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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Babitskii A. N., Belyaev B. A., Boev N. M., Skomorokhov G. V., Izotov A. V., Galeev R. G.
Заглавие : A magnetometer of weak quasi-stationary and high-frequency fields on resonator microstrip transducers with thin magnetic fields
Место публикации : Instrum. Exp. Tech.: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 59, Is. 3. - P.425-432. - ISSN 00204412 (ISSN), DOI 10.1134/S0020441216030131
Примечания : Cited References: 23. - This study was performed within the framework of the State Job of the Ministry of Education and Science of the Russian Federation for the research at the Siberian Federal University in 2014 (project no. 3.528.2014K).
Предметные рубрики: Ferromagnetic-resonance
Films
Susceptibility
Anisotropy
Sensors
Trends
Аннотация: A high-sensitivity magnetometer for simultaneous measurements of three components of a weak quasi-stationary or high-frequency magnetic-field vector was developed and investigated. Microstrip structures that are based on irregular resonators serve as the magnetometer transducers. An anisotropic thin-film magnetic structure is used as the sensing element. This structure consists of two thin magnetic films that are prepared by magnetron sputtering of a Ni75Fe25 permalloy target and separated by a silicon monoxide layer. It is demonstrated that the transducer exhibits the maximum sensitivity, when the easy magnetization axis of the film structure is orthogonal to the polarization direction of the pumping microwave magnetic field in the microstrip resonator and at an optimal value of a constant magnetic bias field and its optimal deflection from the pumping-field polarization direction which is parallel to it. The magnetometer is characterized by a wide dynamic range of measured magnetic fields, 10–10–10–4 Т, and a wide frequency range, 10–1–105 Hz. © 2016, Pleiades Publishing, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Dubrovskiy A. A., Popkov S. I., Shaykhutdinov K. A., Petrov M. I.
Заглавие : Magnetic field dependence of intergrain pinning potential in bulk granular composites YBCO plus CuO demonstrating large magneto-resistive effect
Разночтения заглавия :авие SCOPUS: Magnetic field dependence of intergrain pinning potential in bulk granular composites YBCO + CuO demonstrating large magneto-resistive effect
Место публикации : J. Supercond. Nov. Magn.: SPRINGER, 2008. - Vol. 21, Is. 4. - P243-247. - ISSN 1557-1939, DOI 10.1007/s10948-008-0324-1
Примечания : Cited References: 22
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
ACTIVATED PHASE-SLIP
TRANSITION
DISSIPATION
MECHANISM
SENSORS
MODEL
Ключевые слова (''Своб.индексиров.''): bulk granular high-t(c) superconductor--magneto-resistive effect--josephson junction network--inter-grain pinning potential--bulk granular high-t c superconductor--inter-grain pinning potential--josephson junction network--magneto-resistive effect--bulk composites--bulk granular high-t subc/sub superconductor--granular composites--inter-grain pinning potential--josephson junction network--magnetic field dependences--magneto-resistive effect--pinning potential--resistive effects--resistive transitions--wide temperature range--y-ba-cu-o--atmospheric temperature--barium--copper--copper oxides--electric resistance--magnetic field measurement--magnetic fields--magnetoresistance--magnetos--yttrium barium copper oxides--magnetic field effects
Аннотация: The broadening of the resistive transition in magnetic field and isotherms of magnetoresistance of bulk composites Y-Ba-Cu-O + CuO have been studied. These composites exhibit large magneto-resistive effect in a wide temperature range below T (C) due to weakening of Josephson coupling in this system. The broadening of the resistive transition and magnetoresistance are explained well by the Ambegaokar-Halperin (AH) model for phase slip in Josephson junctions. The magnetic field dependence of pinning potential in the intergrain boundaries deduced from AH model found out to be similar to that of critical current of an array of Josephson junctions. The values of pinning energy point out that the large magneto-resistive effect observed in the composites results from flux flow-like processes at the intergrain boundaries.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Prus A. G., Shaykhutdinov K. A., Gokhfeld D. M., Petrov M. I.
Заглавие : Study of dependence upon the magnetic field and transport current of the magnetoresistive effect in YBCO-based bulk composites
Место публикации : Supercond. Sci. Technol.: IOP PUBLISHING LTD, 2007. - Vol. 20, Is. 6. - P495-499. - ISSN 0953-2048, DOI 10.1088/0953-2048/20/6/002
Примечания : Cited References: 25
Предметные рубрики: CERAMIC SUPERCONDUCTORS
DISSIPATION
TRANSITION
SENSORS
MOTION
FILMS
Ключевые слова (''Своб.индексиров.''): current voltage characteristics--lorentz force--magnetic field effects--magnetic flux--magnetic sensors--magnetoresistance--intergrain boundaries--magnetic field sensor devices--magnetoresistance curves--magnetoresistive properties--yttrium barium copper oxides
Аннотация: The magnetoresistive properties of bulk YBCO + CuO and YBCO + BaPb0.75Sn0.25O3 composites for different orientations of external magnetic field H and macroscopic transport current j have been measured. These composites exhibit large magnetoresistance in weak magnetic fields ( 100 Oe), which makes them promising candidates for practical application in magnetic field sensor devices. The difference between.( T) dependences, magnetoresistance curves R( H) and current - voltage characteristics measured for H parallel to j and H || j is observed indicating the presence of the Lorentz- force- dependent dissipation in the composites. Angular dependences of magnetoresistance R(theta) ( where theta
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Frolov G. I., Yakovchuk V. Y., Seredkin V. A., Iskhakov R. S., Stolyar S. V., Polyakov V. V.
Заглавие : Unidirectional anisotropy in ferromagnetic-ferrimagnetic film structures
Место публикации : Tech. Phys.: AMER INST PHYSICS, 2005. - Vol. 50, Is. 12. - P1605-1610. - ISSN 1063-7842, DOI 10.1134/1.2148562
Примечания : Cited References: 25
Предметные рубрики: BILAYERS
SENSORS
Аннотация: A mechanism of unidirectional anisotropy formation in an exchange-coupled ferromagnetic-ferrimagnetic film structure with orthogonal effective magnetizations in the layers is investigated. The reason for unidirectional anisotropy is the magnetic heterogeneity of the ferrimagnetic layer in the compensation range. Magnetization reversal in the magnetically soft layer of an (REE-transition metal)/NiFe film structure is discussed based on a model of uniform rotation of magnetization. It is found that unidirectional anisotropy sharply decreases the magnetic noise level in the magnetically soft layer. The field of application of these materials is outlined. (c) 2005 Pleiades Publishing, Inc.
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