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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Patrin G. S., Polyakova K. P., Patrusheva T. N., Velikanov D. A., Volkov N. V., Balaev D. A., Patrin K. G., Klabukov A. A.
Заглавие : Synthesis and magnetic property feature of La0.7Sr0.3MnO3 manganite polycrystalline
Место публикации : III Байкальская международная конференция, Иркутск, 2008, C. 79
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ivantsov R. D., Mikhailov M. M., Edelman I. S., Yurkin G. Yu.
Заглавие : Features of magnetic and magneto-optical properties of lanthanum manganite microparticles
Коллективы : Asian School-Conference on Physics and Technology of Nanostructured Materials, Азиатская школа-конференция по физике и технологии наноструктурированных материалов
Место публикации : The Sixth Asian school-conference on physics and technology of nanostructured materials: Proceedings. - VLadivostok, 2022. - Ст.III.o.06. - P.128. - ISBN 987-5-8044-1716-2
Примечания : Cited References: 1
Аннотация: For La1-xSrxMnO3 powders prepared by the solid-phase reaction method using various thermal regimes and x values, the temperature dependences of magnetization, circular magnetic dichroism (MCD), and diffuse reflectance spectra were studied. The powders synthesis at temperatures of 800–900 °C for 2 h leads to the formation of a multiphase state. The higher temperatures and duration of synthesis lead to the formation of two predominant magnetic phases with the Curie temperature (TC) of about 250 and 360 K. Correlation is established between magnetic states of the powder and the shape of the diffuse reflection spectra. The strong red shift of the MCD spectrum for the La1-xSrxMnO3 powder is revealed comparing to the MCD spectra of La1-xSrxMnO3 films available in literature.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Freidman A. L., Semenov S. V., Kolkov M. I., Terent'ev K. Yu., Pavlovskiy N. S., Gokhfeld D. M., Shaykhutdinov K. A., Balaev D. A.
Заглавие : Inverse and direct magnetoelectric effects in orthorhombic DyMnO3 manganite single crystals
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-243024]
Место публикации : J. Appl. Phys. - 2020. - Vol. 128, Is. 9. - Ст.094102. - ISSN 0021-8979, DOI 10.1063/5.0006595. - ISSN 1089-7550(eISSN)
Примечания : Cited References: 27. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project "Research, synthesis and investigation of new oxide single crystals showing the interrelation of magnetic, magnetoelastic and magnetoelectric properties" (Project No. 18-42-243024). The measurements were performed in part on the equipment at the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences
Аннотация: Correlations between the direct and inverse magnetoelectric effects in orthorhombic DyMnO3 single crystals have been investigated. In the inverse magnetoelectric effect, the magnetic moment of the crystal appears to have a contribution that is sinusoidal oscillating in ac electric fields below the temperature TFE of ferroelectric phase transition. The first and the second harmonics of the inverse magnetoelectric effect are clearly detected. The magnetoelectric susceptibilities α and β, corresponding to first and second harmonics, are found to correlate with the derivative of polarization with respect to the magnetic field. The influence of the magnetic and electric regimes during cooling on magnetoelectric effects has also been studied. The maximum change in the magnetic moment of a sample under the action of electric fields is observed under the same (T, H) conditions as the rotation of the spontaneous polarization vector from the crystallographic c direction to the a axis in the magnetic field H || b.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Patrin G. S., Mataev M. M., Seitbekova, K. Zh., Shiyan Ya. G., Yarikov S. A., Zharkov S. M.
Заглавие : Magnetic and resonance properties of the Y0.5Sr0.5Cr0.5Mn0.5O3 polycrystal
Коллективы : Ministry of Education and Science of the Republic of KazakhstanGovernment of the Republic of KazakhstanMinistry of Education and Science of the Republic of Kazakhstan [05130165]
Место публикации : Phys. Solid State. - 2020. - Vol. 62, Is. 8. - P.1350-1354. - ISSN 1063-7834, DOI 10.1134/S1063783420080272. - ISSN 1090-6460(eISSN)
Примечания : Cited References: 20. - This study was supported by the Ministry of Education and Science of the Republic of Kazakhstan, project no. 05130165 and carried out in the framework of the cooperation agreement between the Siberian Federal University and the Kazakh National Women's Teacher Training University
Предметные рубрики: CHROMIUM
TRANSITION
Аннотация: The magnetostatic and magnetic resonance properties of the Y0.5Sr0.5Cr0.5Mn0.5O3 polycrystalline system have been experimentally investigated. The predominance of the intracrystalline ferromagnetic interaction and the antiferromagnetic character of the intercrystallite interaction have been established. The magnetic resonance spectrum in the magnetically ordered region consists of two lines. The high-field line corresponds to the interacting parts of polycrystal shells and the low-field peak is related to the disordered system of ferromagnetic particles.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Samoshkina Yu. E., Edelman I. S., Rautskii M. V., Molokeev M. S.
Заглавие : Correlation between magneto-optical and transport properties of Sr doped manganite films
Место публикации : J. Alloys Compd. - 2019. - Vol. 782. - P.334-342. - ISSN 09258388 (ISSN) , DOI 10.1016/j.jallcom.2018.12.158
Примечания : Cited References: 51. - The authors are grateful to A.V. Malakhovskii (Kirensky Institute of Physics, Federal Research Center KSC SB RAS) for fruitful discussions of the magneto-optics data and V.I. Chichkov and N.V. Andreev (National University of Science and Technology MISiS) for the preparation of the manganite films. The work was supported partly by Russian Academy of Sciences , [grant number 0356-2017-0030 ], and the Russian Foundation for Basic Research , [grant number 16-32-00209 ].
Ключевые слова (''Своб.индексиров.''): thin films--manganites--crystal structure--electrical transport--electronic properties--magnetic circular dichroism
Аннотация: The features of electronic structure of La0.7Sr0.3MnO3 Pr0.8Sr0.2MnO3, and Pr0.6Sr0.4MnO3 polycrystalline films of different thickness have been investigated using magnetic circular dichroism (MCD) in the range of 1.1–4.2 eV. The temperature behavior of the samples electrical resistance were also has been studied. It was found that films with high Sr content (0.3 and 0.4) act as high-temperature semiconductors, while the maximum in the temperature dependences of resistivity these films indicates the transition of the samples to the metallic state at some temperature TM-S, which is different for different sample thickness. The films with the lower Sr content (0.2) act as insulators in the used temperature range. The MCD spectra have been decomposed to the Gaussian-shaped lines, and the temperature dependence of intensity of each line has been analyzed in comparison with temperature dependence of the films magnetization and with their electric conductivity type. Different temperature behavior of the intensity of four specified Gaussian-lines was revealed for semiconductor films. In the case of insulating Pr0.8Sr0.2MnO3 samples, the intensity of three specified Gaussian lines changes with the temperature in the same way as the magnetization changed. It was established that the lanthanide (La, Pr) type does not affect the MCD spectra shape for the films with the same electrical conductivity type. Besides, the correlation between the MCD data of the films and their conductivity type was revealed. Due to the detailed analysis of the specified Gaussian lines with taking into account the well-known in the literature absorption bands, lying outside the studied spectral region, the MCD bands for the studied manganite films have been identified with electronic transitions of a different nature.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ivantsov R. D., Mikhailov M. M., Yurkin G. Yu., Edelman I. S.
Заглавие : Preparation, phase evolution, and magnetic properties of lanthanum manganite perovskite powders synthesized by solid-state reaction
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 1. - Ст.C.P14. - P.294-295. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 6. - The reported study was carried out with the financial support of the Russian Foundation for Fundamental Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Territory Fund for Support of Scientific and Technical Activity in the framework of scientific Projects No. 18-43-243003 and No. 18-42-243011. The work is supported by the Special Program of the Ministry of Education and Science of the Russian Federation for the Siberian Federal University
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Samoshkina Yu. E., Edelman I. S., Stepanova E. A., Neznakhin D. S., Ollefs K., Andreev N. V., Chichkov V. I.
Заглавие : Magnetic and XMCD studies of Pr1-xSrxMnO3 manganite films
Место публикации : J. Magn. Magn. Mater.: Elsevier, 2017. - Vol. 428. - P.43-49. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2016.12.014
Примечания : Cited References: 52. - The work was supported by the Russian Foundation for Basic Research, Project no's. 14-02-01211, 16-32-00209 mol_a, and also the Grant of the President of the Russian Federation no. NSh- 7559.2016.2, and the Ministry of Education and Science of the Russian Federation, Project no. 1362.
Ключевые слова (''Своб.индексиров.''): hole-doped manganites--thin films--magnetic measurements--spin-glass behavior--x-ray magnetic circular dichroism
Аннотация: Magnetic properties of the Pr0.8Sr0.2MnO3 and Pr0.6Sr0.4MnO3 polycrystalline films have been studied using temperature and magnetic field dependences of the static magnetization and X-ray magnetic circular dichroism (XMCD) spectroscopy. For the both compositions, the difference between the temperature dependences of magnetization obtained in the zero fields cooling (ZFC) and field cooling (FC) modes has been revealed. The ZFC curves demonstrate a pronounced maximum at temperature Tm. It is shown that the Tm value dependence on the magnetic field follows the Almeida-Thouless line typical for the classic spin glass, what allows us to assume the possible spin-glass behavior of the films. Effect of the disorder in a direction of the crystallites easy-axis on the difference between FC and ZFC curves has been discussed also. Magnetic field dependences of the sample magnetization are presented by the hysteresis loops with the shape changing upon temperature variation. This behavior has been attributed to the effect of crystallographic anisotropy and Pr ions. The spectra and magnetic field dependences of XMCD at the Pr L2- and Mn K-edges have been studied at 90 K. The magnetic field dependences of the XMCD at the Pr L2-edge had shown Van Vleck paramagnetism from Pr3+ ions. © 2016 Elsevier B.V.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Samoshkina Yu. E., Edelman I. S., Sokolov A. Е., Molokeev M. S., Maximova O. A., Andreev N. V., Chichkov V. I.
Заглавие : Features of the magneto-optical response in manganite films
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow International Symposium on Magnetism (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.5PO-K3-2. - P.1093 (Шифр 29916280)
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Samoshkina Yu. E., Edelman I. S., Sokolov A. E., Rautskii M. V., Semenov S. V., Andreev N. V., Chichkov V. I.
Заглавие : La-Sr and Pr-Sr polycrystalline manganite films: correlation between magneto-optical and transport properties
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.P6.7. - P.315. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : The work was supported partly by the Russian Foundation for Basic Researches, Grants Nos. 14-02-01211 and 16-32-00209
Ключевые слова (''Своб.индексиров.''): hole-doped manganites--thin films--magnetic circular dichroism--metal-insulator transition
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Никитин, Станислав Евгеньевич, Попков, Сергей Иванович, Петров, Михаил Иванович, Терентьев, Константин Юрьевич, Семенов, Сергей Васильевич, Шайхутдинов, Кирилл Александрович
Заглавие : Особенности магнетосопротивления двухслойного монокристаллического манганита La1,4Sr1,6Mn2O7
Коллективы : Сибирский молодежный семинар по высокотемпературной сверхпроводимости и физике наноструктур – ОКНО 2014 (X; 13 - 14 ноября 2014 г.; Новосибирск)
Место публикации : Вестник НГУ. Физика: Новосибирский государственный университет, 2015. - Т. 10, Вып. 1. - С. 63-66. - ISSN 1818-7994
Примечания : Библиогр.: 8
Ключевые слова (''Своб.индексиров.''): манганиты лантана--положительное магнетосопротивление--manganite--positive magnetoresistance
Аннотация: Представлены результаты исследования магнетосопротивления на двухслойном монокристаллическом манганите лантана La1,4Sr1,6Mn2O7 при пропускании транспортного тока вдоль оси с ( j ‖ c ) и приложении внешнего магнитного поля H ‖ j и H ⊥ j. В монокристалле La1,4Sr1,6Mn2O7 в случае, когда H ⊥ j, помимо присущего всем замещенным манганитам лантана отрицательного магнетосопротивления в температурном диапазоне T 60 K, обнаружен эффект положительного магнетосопротивления. Механизм возникновения данного эффекта принципиально отличается от эффекта колоссального магнетосопротивления, присущего всем манганитам лантана. Мы считаем, что появление положительного магнетосопротивления вызвано спин-зависимым туннелированием носителей между марганец-кислородными бислоями, при данной конфигурации «магнитное поле - ток», и может быть объяснено особенностями магнитной структуры данных составов.We investigate magnetoresistance of single-crystal bilayer lanthanum manganite La1.4Sr1.6Mn2O7 at a transport current flowing along the crystal c axis and in external magnetic fields applied parallel to the crystal c axis or ab plane. It is demonstrated that the La1.4Sr1.6Mn2O7 manganite exhibits the positive magnetoresistance effect in the magnetic field applied in the ab plane of the sample at the temperatures T 60 K. The mechanism of this effect is shown to be fundamentally different from the colossal magnetoresistance effect typical of lanthanum manganites. The positive magnetoresistance originates from spin-dependent tunneling of carriers between the manganese-oxygen bilayers and can be explained by features of the magnetic structure of the investigated compounds.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Samoshkina Yu. E., Edelman I. S., Sokolov A. E., Andreev N. V., Chichkov V. I.
Заглавие : Visible circular and linear magnetic dichroism in manganite thin films
Место публикации : Circular and Linear Dichroism/ ed. J. Wallace. - New York: Nova Science Publishers, 2015. - P.131-158. - (Lasers and electro-optics research and technology). - ISBN 978-1-63483-762-0
Примечания : Cited References: 45. - The work was supported partly by RFBR, grant № 14-02-01211 and Grant of President of Russian Federation No. NSh-2886.2014.2
Аннотация: Evolution of the magneto-optical spectra of the La0.7Sr0.3MnO3, Pr0.6Sr0.4MnO3 and Pr0.8Sr0.2MnO3 manganite films with the change in the Sr concentration has been studied in the visible and near infrared range. Magnetic circular dichroism (MCD) and magnetic linear dichroism (MLD) have been chosen for investigation as these effects are higher informative comparing to the Faraday and Kerr effects. The Sr concentration increase in the samples leads to a sequential shift of the gravity centers of the magneto-optical bands to lower energies, to a strong increase of the effects magnitude in the range of 2.5-3.6 eV, and to the appearance of the additional bands in the spectra of the films with metallic conductivity. Experimental spectra have been decomposed to several Gaussian and Lorentz contours, and their intensity temperature dependences have been analyzed. For the films with metallic conductivity, the different character of the temperature dependences of the different bands intensity has been found. Basing on the characteristic dependence of the magneto-optical bands intensity on temperature, Sr concentration, and films conductivity type, electron transitions responsible for the MCD and MLD spectra formation have been identified.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Myagkov V. G., Zhigalov V. S., Matsynin A. A., Bykova L. E., Mikhlin Y. L., Bondarenko G. N., Patrin G. S., Yurkin G. Yu.
Заглавие : Formation of ferromagnetic germanides by solid-state reactions in 20Ge/80Mn films
Место публикации : Thin Solid Films: Elsevier Science, 2014. - Vol. 552. - P.86-91. - ISSN 0040-6090, DOI 10.1016/j.tsf.2013.12.029
Примечания : Cited References: 53
Предметные рубрики: PHASE-FORMATION
MAGNETIC-PROPERTIES
Mn5Ge3 FILMS
X-RAY
Ge(111)
TRANSFORMATIONS
DIFFUSION
SPECTRA
SYSTEM
LAYERS
Ключевые слова (''Своб.индексиров.''): manganite-germanium--solid state reaction--first phase--mn5ge3 alloy--carbon impurity--oxygen impurity--annealing--magnetic anisotropy
Аннотация: Solid state reactions between Ge and Mn films are systematically examined using X-ray diffraction, photoelectron spectroscopy, and magnetic and electrical measurements. The films have a nominal atomic ratio Ge:Mn = 20:80 and are investigated at temperatures from 50 to 500 °C. It is established that after annealing at ~ 120°C, the ferromagnetic Mn5Ge3 phase is the first phase to form at the 20Ge/80Mn interface. As the annealing temperature increases to 300°C, the weak magnetic Mn5Ge 2 + Mn3Ge phases simultaneously begin to grow and they become dominant at 400°C. Increasing the annealing temperature to 500°C leads to the formation of the ferromagnetic phase with a Curie temperature TC ~ 350-360 K and magnetization 14-25 kA/m at room temperature. The X-ray diffraction study of the samples shows the reflections from the Mn 5Ge3 phase, and the photoelectron spectra contain the oxygen and carbon peaks. The homogeneous distribution of oxygen and carbon over the sample thickness suggests that the increased Curie temperature and magnetization are related to the migration of C and O atoms into the Mn 5Ge3 lattice and the formation of the Nowotny phase Mn5Ge3CxOy. The initiation temperature (~ 120 C) is the same in the Mn5Ge3 phase with the solid-state reactions in the Ge/Mn films as well as in the phase separation in the GexMn1 - x diluted semiconductors. Thus, we conclude that the synthesis of the Mn5Ge3 phase is the moving force for the spinodal decomposition of the GexMn 1 - x diluted semiconductors.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Smolyakov D. A., Rautskii M. V., Chichkov V. I., Mukovskii Y. M.
Заглавие : Magnetization dynamics and electron transport in the La0.7Sr0.3MnO3/Y3Fe5O12 hybrid structures
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : Solid State Phenom.: Selected, peer reviewed papers/ ed.: S. G. Ovchinnikov, A. Samardak: Trans Tech Publications, 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P.368-371. - ISSN 978-303835054-5, DOI 10.4028/www.scientific.net/SSP.215.368. - ISSN 1662-9779
Примечания : Cited References: 6
Ключевые слова (''Своб.индексиров.''): hybrid structure--manganite--spin pumping
Аннотация: We present the results of investigations of the spin-polarized current and spin dynamics in the hybrid structures ferrimagnetic insulator/ferromagnetic metal subjected to microwave radiation. We studied the La0.7Sr0.3MnO3/Y3Fe5O12 bilayer films on the Gd3Ga5O12 substrate. It was experimentally established that under the action of spin pumping the resistance of the La0.7Sr0.3MnO3 film changes. The value of ?R is maximum in the sample with a La0.7Sr0.3MnO3 layer thickness of 10 nm and sharply drops as the manganite film thickness is increased. The resistance decreases in the paramagnetic region and grows in the ferromagnetic region at temperatures below the metal-insulator transition point. The variation in the resistance of the manganite film can be attributed to the correlation of the spin dynamics and transport properties of conduction electrons in the structure. © (2014) Trans Tech Publications, Switzerland.
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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Bondarev I. A., Volkov N. V.
Заглавие : Transport properties of the La0.75Ca0.25MnO3 manganite
Коллективы : RACIRI Summer School
Место публикации : RACIRI Summer School: Book of abstracts. - 2013. - P.18
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Greben'kova Yu.E., Sokolov A. E., Edelman I. S., Andreev N. V., Chichkov V. I.
Заглавие : Magneto-optical spectroscopy of manganite thin film : Abstract
Коллективы : "Functional Materials", International Conference , Taurida National V. I. Vernadsky University
Место публикации : Functional materials: Abstracts/ ed. V. N. Berzhansky. - Simferopol, 2013. - P.186. - ISBN 978-966-491-465-6
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Greben'kova Yu.E., Sokolov A. E., Edel'man I. S., Andreev N. V., Chichkov V. I.
Заглавие : Linear and circular magnetic dichroism in thin films of lanthanum manganite
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - P.324. - ISBN 978-5-7444-3124-2
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Volkov N. V., Rautskii M. V., Eremin E. V., Patrin G. S., Kim P. D., Lee C. G.
Заглавие : Response of a manganite-based magnetic tunnel structure to microwave radiation
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P.125-128. - ISBN 978, DOI 10.4028/www.scientific.net/SSP.190.125. - ISBN 9783037854365
Ключевые слова (''Своб.индексиров.''): magnetic tunnel structure--microwave detection effect--spintronics--current flowing--current-in-plane geometry--magnetic tunnels--magnetization dynamics--microwave detection--non-linearity--rectification effects--spin-polarized currents--voltage signals--magnetic materials--magnetoelectronics--manganese oxide--microwaves--magnetism
Аннотация: We demonstrate that a magnetic tunnel structure irradiated by microwaves can generate a significant voltage signal due to the rectification effect. The measurements were carried out using current-in-plane geometry with a current flowing parallel to the interfaces in the structure. A value of the microwave-induced voltage strongly depends on a bias current and can be driven by a magnetic field. The rectification effect is discussed both in "Classical" terms of nonlinearity of the current-voltage characteristic and using a mechanism that involves the interplay between the spinpolarized current and magnetization dynamics in the magnetic tunnel structure. В© (2012) Trans Tech Publications.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V.
Заглавие : Spintronics: manganite-based magnetic tunnel structures
Место публикации : Phys. Usp.: Turpion LTD, 2012. - Vol. 55, Is. 3. - P.250-269. - ISSN 1063-7869, DOI 10.3367/UFNe.0182.201203b.0263
Примечания : Cited References: 91. - This work was supported by the Russian Foundation for Basic Research (grant No. 11-02-00367-a); the program of the Presidium of the RAS, Fundamental Research on Nanotechnologies and Nanomaterials (grant No. 21.1); the program of the Department of Physical Sciences of the RAS "Spin Phenomena in Solid Nanostructures and Spintronics" (grant No. 2.4.4.1); integration projects of the Siberian Branch, RAS, Nos 5 and 134; and the Federal Special Purpose Program "Scientific and Pedagogical Personnel of Innovative Russia" (state contract No. NK-556P_15).
Предметные рубрики: HIGH-FREQUENCY RECTIFICATION
THIN INSULATING FILM
COLOSSAL MAGNETORESISTANCE
GIANT MAGNETORESISTANCE
ELECTRONIC-STRUCTURE
SANDWICH STRUCTURES
SPIN POLARIZATION
IDENTICAL METALS
PHASE-SEPARATION
ROOM-TEMPERATURE
Аннотация: A topical and highly promising aspect of the field of spintronics is the physics involved in the flow of a spin-polarized current through magnetic tunnel structures. This review focuses on manganite-based structures, which are appealing for their high Curie temperature, highly spin-polarized conduction electrons, high chemical stability, and well-developed fabrication technology. Particular emphasis is placed on some novel approaches to studying the tunnel structures, including the use of planar geometry and the application of combined external factors (microwave and optical radiation) to investigate spin-polarized transport.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Rautskiy M. V., Eremin E. V., Patrin G. S., Kim P. D., Lee C. G.
Заглавие : Response of a manganite-based magnetic tunnel structure to microwave radiation
Место публикации : J. Phys. D. - 2012. - Vol. 45, Is. 25. - Ст.255301. - ISSN 0022-3727, DOI 10.1088/0022-3727/45/25/255301
Примечания : Cited References: 20. - This study was supported by the Russian Foundation for Basic Research, project no 11-02-00367-a; the Presidium of the Russian Academy of Sciences, program Fundamentals for Basic Research of Nanotechnology and Nanomaterials, project no 21.1; the Division of Physical Sciences of the Russian Academy of Sciences, program Spin-Dependent Effects in Solids and Spintronics, project no 2.4.4.1; the Siberian Branch of the Russian Academy of Sciences, integration projects nos 5 and 134; and the Federal target program Scientific and Pedagogical Personnel of Innovative Russia (State contract no NK-556P_15).
Предметные рубрики: IDENTICAL METALS
JUNCTIONS
RECTIFICATION
SPINTRONICS
MECHANISM
Аннотация: We demonstrate that a magnetic tunnel structure irradiated by microwaves can generate a typical voltage signal due to the rectification effect. We performed measurements in current-in-plane geometry when a current flows parallel to the interfaces in the structure. The value of the microwave-induced voltage strongly depends on the bias current and can be driven by a magnetic field. The rectification effect is discussed both in classical terms of nonlinearity of the current-voltage characteristics and within the mechanism involving the interplay between the spin-polarized current and the magnetization dynamics in the magnetic tunnel structure.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shaykhutdinov K. A., Semenov S. V., Popkov S. I., Balaev D. A., Bykov A. A., Dubrovskiy A. A., Petrov M. I., Volkov N. V.
Заглавие : Magnetoresistance of substituted lanthanum manganites La0.7Ca0.3MnO3 upon nonequilibrium overheating of carriers
Разночтения заглавия :авие SCOPUS: Magnetoresistance of substituted lanthanum manganites La 0.7Ca 0.3MnO 3 upon nonequilibrium overheating of carriers
Место публикации : J. Appl. Phys.: AMER INST PHYSICS, 2011. - Vol. 109, Is. 8. - Ст.83711. - ISSN 0021-8979, DOI 10.1063/1.3573666
Примечания : Cited References: 15. - This study was partially supported by the Russian Foundation for Basic Research, project no. 08-02-00259a, and the Lavrent'ev's Competition of Young Scientists of the Siberian Branch of the RAS, project no. 12.
Ключевые слова (''Своб.индексиров.''): field dependence--lanthanum manganites--low thermal conductivity--manganite materials--negative differential resistivity--non equilibrium--non-linearity--nonequilibrium heating--polycrystalline--positive magnetoresistance--transport currents--electric resistance--electron gas--heating--lanthanum--lanthanum alloys--magnetic fields--magnetoelectronics--magnetoresistance--manganese oxide--manganites--thermal conductivity--current voltage characteristics
Аннотация: Current-voltage characteristics of the polycrystalline substituted lanthanum manganite La0.7Ca0.3MnO3 were experimentally studied at T - 77.4 K in magnetic fields up to 13 kOe. In these characteristics, a portion of negative differential resistivity was observed above a certain threshold value of critical current density j caused, in our opinion, by nonequilibrium heating of the electron gas due to low thermal conductivity of the manganite material. Because of the nonlinearity of the current-voltage characteristics, the field dependences of resistivity rho( H) appear extremely sensitive to the value of a transport current. In this case, the rho( H) dependences reveal both ordinary negative and positive magnetoresistance. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3573666]
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