The nonlinear influence of an electric field on phase transitions in ferromagnetic semiconductors: Lanthanum manganite / Povzner A. A.,Volkov A. G. // TECHNICAL PHYSICS LETTERS. - 2016. - V. 42, l. 4. - P. 387-390.

ISSN/EISSN:

1063-7850 / 1090-6533

Type:

Article

Abstract:

We investigate nonequilibrium processes of self-heating induced by electric current in ferromagnetic semiconductors exhibiting colossal magnetoresistance (CMR) in the vicinity of the Curie temperature. The heat balance equation is solved taking into consideration localized states that appear as a result of scattering from magnetic inhomogeneities and are characterized by a percolation threshold proportional to the amplitude of spin fluctuations. The appearance of N-shaped current-voltage characteristics and hysteresis in the dependence of magnetization on electric potential difference, which are caused by the emergence of a ``hot{''} (with respect to internal temperature) semiconductor paramagnetic phase, is revealed in the steady-state regime. The possibility of suppression of the effect of colossal magnetoresistance with increasing potential difference is indicated. The onset of self-oscillation of current and magnetization with decreasing transverse dimensions of the sample is demonstrated.

Author keywords:

DISORDER

DOI:

10.1134/S106378501604012X

Web of Science ID:

ISI:000376454900015

Соавторы в МНС:

Другие поля

Поле	Значение
Month	APR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6533
Keywords-Plus	DISORDER
Research-Areas	Physics
Web-of-Science-Categories	Physics, Applied
Author-Email	a.a.povzner@urfu.ru
ResearcherID-Numbers	Povzner, Aleksandr/A-4625-2016
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation {[}1236]
Funding-Text	This work was supported by the Ministry of Education and Science of the Russian Federation within the framework of the project part of the state assignment to Ural Federal University, project no. 1236.
Number-of-Cited-References	9
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	3
Journal-ISO	Tech. Phys. Lett.
Doc-Delivery-Number	DM6IJ