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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Petrakovskii G. A., Sokolov V. V., Velikanov D. A., Vorotynov A. M., Bovina A. F., Amirov A. A., Aliev A. M., Khanov L. N., Patrin G. S.
Заглавие : New magnetic materials Cu x Mn1 − x S with a metal-insulator transition
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 3. - P.531–536. - ISSN 1063-7834, DOI 10.1134/S106378341203002X
Примечания : Cited References: 9
Предметные рубрики: Alpha-MnS
Manganese
Аннотация: This paper reports on first results of the synthesis and study of the thermal, structural, electrical, resonance, and magnetic properties of new sulfide materials Mex Mn1 – S (Me = Cu, 0 ˂ x ˂ 0.2) synthesized based on manganese monosulfide. The materials have a NaCl cubic structure at 300 K and undergo a con centration metal–insulator transition with increasing degree of substitution and with varying temperature. The magnetic transition occurs in the region of the heat capacity anomaly. The Néel temperature is slightly dependent on the copper concentration. The samples with a high copper content exhibit metallic conduction at T ˂ 260 K and semiconductor conduction at T ˃ 260 K.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Schefer, Juerg, Aliouane N., Boehm M., Petrakovskiy G. A., Vorotynov A. M., Gorev M. V., Bovina A. F., Sokolov V. V.
Заглавие : Single-crystal and powder neutron diffraction study of the FeXMn1−XS solid solutions
Место публикации : J. Alloys Compd.: Elsevier Science, 2015. - Vol. 632. - P.563-567. - ISSN 0925, DOI 10.1016/j.jallcom.2015.01.162. - ISSN 18734669(eISSN)DOI 10.1002/chin.201522001
Примечания : Cited References:23. - This study was supported in part by the INTAS project no. 06-1000013-9002 and the CRDF-SB RAS project no. RUP1-7054-KR-11, N 16854.
Предметные рубрики: PHASE-TRANSITIONS
ALPHA-MNS
MAGNETIC STRUCTURES
HIGH-PRESSURE
FEO
Ключевые слова (''Своб.индексиров.''): magnetic semiconductors--neutron diffraction
Аннотация: The α-MnS-based FeXMn1−XS (0 < x < 0.3) solid solutions are synthesized and shown to be new Mott materials with the rock salt structure. Neutron diffraction data show that the chemical-pressure-induced Neel temperature shift from 150 (x = 0) to 200 K (x = 0.29) observed in these materials is accompanied by a decrease in the NaCl-type cubic lattice parameters. It is established that at the symmetry transformation in the compositions with x = 0.25 and 0.29 the structural transition occurs, which is followed by the magnetic transition. These features make the FeXMn1−XS solid solutions interesting for both fundamental study of the interrelation between the magnetic, electrical, and structural properties in MnO-type strongly correlated electron systems and application.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Ryabinkina L. I., Romanova O. B., Velikanov D. A., Balaev A. D., Balaev D. A., Yanushkevich K. I., Galyas A. I., Demidenko O. F., Bandurina O. N.
Заглавие : Transport properties and ferromagnetism of Co(x)Mn(1-x)Ssulfides
Разночтения заглавия :авие SCOPUS: Transport properties and ferromagnetism of Co x Mn 1 - X S sulfides
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 106, Is. 4. - P765-772. - ISSN 1063-7761, DOI 10.1134/S1063776108040158
Примечания : Cited References: 39
Предметные рубрики: GIANT VOLUME MAGNETOSTRICTION
COLOSSAL MAGNETORESISTANCE
MAGNETIC SEMICONDUCTORS
ELECTRICAL-PROPERTIES
ROOM-TEMPERATURE
ALPHA-MNS
SPINTRONICS
TRANSITION
FEXMN1-XS
FIELDS
Ключевые слова (''Своб.индексиров.''): coulomb interactions--current voltage characteristics--electromotive force--ferromagnetism--magnetic susceptibility--magnetization--thermoelectricity--transport properties--charge susceptibility--external magnetic fields--temperature intervals--thermoelectromotive force--cobalt compounds
Аннотация: We have studied the resistivity and thermoelectromotive force (thermo emf) in a temperature range of T = 80-1000 K, the magnetic susceptibility and magnetization in a temperature range of T= 4.2-300 K at an external magnetic field of up to 70 kOe, and the structural characteristics of CoxMn1 - S-x sulfides (0
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Petrakovskii G. A., Bayukov O. A., Varnek V. A., Sokolov V. V., Bovina A. F.
Заглавие : Mossbauer studies of FexMn1-xS single crystals
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 50, Is. 2. - P237-240. - ISSN 1063-7834, DOI 10.1134/S1063783408020042
Примечания : Cited References: 16
Предметные рубрики: METAL-INSULATOR-TRANSITION
MAGNETIC-PROPERTIES
ALPHA-MNS
SULFIDES
MAGNETORESISTANCE
PRESSURE
SYSTEM
OXIDES
Аннотация: Single crystals of iron manganese sulfides FexMn1-xS (0.25
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Volkov N. V., Petrakovskii G. A., Mita Y., Bayukov O. A., Velikanov D. A., Vorotynov A. A., Sokolov V. V., Bovina A. F.
Заглавие : Metal-insulator transition in FexMn1-xS crystals
Разночтения заглавия :авие SCOPUS: Metal-insulator transition in Fe x Mn1-x S crystals
Место публикации : JETP Letters. - 2007. - Vol. 86, Is. 6. - P.371-374. - ISSN 0021-3640, DOI 10.1134/S0021364007180051
Примечания : Cited References: 15
Предметные рубрики: ALPHA-MNS
PHASE-TRANSITION
SULFIDES
Аннотация: Results of an experimental study of MnS, FeS, and FexMn1-xS single crystals are presented. The phase composition, the lattice parameters, and the state of paramagnetic ions in FexMn1-xS have been determined by x-ray diffraction analysis and Mossbauer spectroscopy. A sequence of transitions have been found in iron manganese sulfide with x = 0.29 at temperatures T-1 approximate to 25-50 K, T-2 approximate to 125 K, and T-3 approximate to 190 K with a change in kinetic properties and the formation of a metallic state at low temperatures T approximate to 2 K. The possibility of a Mott-Hubbard transition in FexMn1-xS sulfides with variation of the composition and the temperature is discussed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Petrakovskii G. A.
Заглавие : Metal-insulator transition, magnetoresistance, and magnetic properties of 3d-sulfides (Review)
Место публикации : Low Temp. Phys. - 2006. - Vol. 32, Is. 8-9. - P.725-734. - ISSN 1063-777X, DOI 10.1063/1.2219495; \b Физика низких температур
Примечания : Cited References: 74
Предметные рубрики: GIANT-MAGNETORESISTANCE
PHASE-TRANSITION
ALPHA-MNS
COLOSSAL MAGNETORESISTANCE
SINGLE-CRYSTALS
FES-MNS
SULFIDES
FERROMAGNETISM
SEMICONDUCTORS
TEMPERATURE
Аннотация: The results of a study of the transport and magnetic properties of some sulfides of 3d elements are reported. The concentration transitions with a change of conductivity type and a change of magnetic order are considered, and the features of the colossal magnetoresistance in FexMn1-xS and CuVxCr1-xS2 solid solutions are discussed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Petrakovskiy G. A., Zuberek R., Nabialek A., Boem M., Sokolov V. V., Bovina A. F.
Заглавие : Magnetostriction of FexMn1-xS (x=0.27) Crystals
Коллективы : Siberian Branch, Russian Academy of Sciences; INTAS [06-1000013-9002]
Разночтения заглавия :авие SCOPUS: Magnetostriction of FexMn1 - xS (x = 0.27) crystals
Место публикации : JETP Letters. - 2009. - Vol. 90, Is. 3. - P.207-210. - ISSN 0021-3640, DOI 10.1134/S0021364009150107
Примечания : Cited References: 19. - This work was supported by the Siberian Branch, Russian Academy of Sciences, and INTAS, joint project no. 06-1000013-9002.
Предметные рубрики: ALPHA-MNS
SINGLE-CRYSTALS
TRANSITION
MOSSBAUER
Аннотация: The magnetostriction of FexMn1-xS (x = 0.27) single crystals in strong magnetic fields up to 120 kOe has been investigated. It has been found that the magnetostriction reaches colossal values (+/-3 x 10(-4)) atypical of compounds of 3d elements. It has been found that the magnetostriction changes sign when varying temperature and magnetic field; this behavior indicates an important role of the spin-phonon interactions in the formation of the magnetic order in solid solutions of iron-manganese sulfides.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Ryabinkina L. I., Romanova O. B., Sokolov V. V., Pichugin A. Y., Galyas A. I., Demidenko O. F., Makovetskii G. I., Yanushkevich K. I.
Заглавие : Magnetic and electrical properties of cation-substituted sulfides Me (x) Mn1-x S (Me = Co, Gd)
Коллективы : Russian Foundation for Basic Research RFFI-BRFFI [0802-90031]; FFIRB [F08R-037]
Разночтения заглавия :авие SCOPUS: Magnetic and electrical properties of cation-substituted sulfides Me x Mn1 - X S (Me = Co, Gd)
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2009. - Vol. 51, Is. 4. - P698-701. - ISSN 1063-7834, DOI 10.1134/S1063783409040076
Примечания : Cited References: 17. - This study was supported by the Russian Foundation for Basic Research RFFI-BRFFI (project no. 0802-90031) and FFIRB (project no. F08R-037).
Предметные рубрики: ALPHA-MNS
MAGNETORESISTANCE
TRANSPORT
Аннотация: The temperature dependences of the specific magnetization sigma and the electrical resistivity rho of Me (x) Mn1 - x S single crystals (Me= Co, Gd; x= 0.05) have been studied in the temperature range 80 K T 1000 K. The samples under study have revealed the presence of a spontaneous magnetic moment below the N,el temperature (T (N)) and ferromagnetic clusters in Gd0.05Mn0.95S in the temperature range 146 K T 680 K. Substitution of gadolinium for manganese initiates a transition from p-type to n-type conduction. The change in the conduction type is accompanied by an increase in the electrical resistivity at 300 K by approximately one order of magnitude and, accordingly, by a decrease in the activation energy. The magnetic and electrical properties of the crystals under study have been interpreted in terms of the cluster model with temperature-dependent ferromagnetic exchange and an electron localized in this cluster.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Sitnikov M. N., Romanova O. B., Pichugin, A. Yu.
Заглавие : Magnetoelectric and magnetoresistive properties of the CexMn1-xS semiconductors
Коллективы : RFFI [15-42-04099 r_sibir_a, 16-52-00045 Bel_a]; [114090470016]
Место публикации : Phys. Status Solidi B. - 2016. - Vol. 253, Is. 9. - P.1771-1781. - ISSN 0370-1972, DOI 10.1002/pssb.201600134. - ISSN 1521-3951(eISSN)
Примечания : Cited References:24. - This work was financially supported by RFFI no. 15-42-04099 r_sibir_a, RFFI no. 16-52-00045 Bel_a, and government work no. 114090470016.
Предметные рубрики: X MN1-X S
ALPHA-MNS
GD
Ключевые слова (''Своб.индексиров.''): dielectric permeability--hall effect--magnetoelectric properties--magnetoresistive properties--semiconductors
Аннотация: The effect of electron doping on the magnetoelectric and magnetoresistivity properties of cation-substituted antiferromagnetic CexMn1-xS (x ≤ 0.05) semiconductors at temperatures of 77-500 K in magnetic fields of up to 10 kOe was investigated. For all the compositions shifts of the temperature of the dielectric loss maximum toward higher temperature (80-500 K) with increasing magnetic field up to 10 kOe are found. The current dependence of magnetoresistance from the I-V characteristic measured in a magnetic field was established. The increase of the magnetoresistive effect with increase of the cerium ions concentration in the CexMn1-xS is found. The type of current carriers was determined on the basis of the Hall coefficient measurement. For explanation of experimental data the model of charge-orbital ordering, including orbital glass is used.
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