Influence of voltage on magnetization of ferromagnetic semiconductors with colossal magnetoresistance / Povzner A. A.,Volkov A. G. // JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - 2017. - V. 432, l. . - P. 466-471.

ISSN/EISSN:

0304-8853 / 1873-4766

Type:

Article

Abstract:

The nonequilibrium processes of ``self-heating{''} arising during the flow of electric current are studied for ferromagnetic semiconductors with colossal magnetoresistance near the Curie temperature. These processes lead to the emergence of ``hot{''} paramagnons and the destruction of ferromagnetic order. The solution to the heat balance equation takes into account the temperature dependence of the electrical conductivity caused by Anderson localization of electrons due to their scattering on magnetic inhomogeneities. Description of delocalized electrons subsystem takes into account the spin-flip processes leading to the double exchange. At that, the value of the Anderson percolation threshold and the double exchange depends on the amplitude of spin fluctuations. It was found that N-shaped current-voltage characteristics and hysteresis dependencies of magnetization on the voltage arise in a steady state due to the emergence of ``hot{''} (by internal sample temperature) semiconductor paramagnetic phase. It is shown that the occurrence of self-oscillations of current and magnetization there may be. (C) 2017 Published by Elsevier B.V.

Author keywords:

ANOMALOUS INFLUENCE; FIELD

DOI:

10.1016/j.jmmm.2017.01.104

Web of Science ID:

ISI:000399601600070

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-4766
Keywords-Plus	ANOMALOUS INFLUENCE; FIELD
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Condensed Matter
Author-Email	a.a.povzner@urfu.ru agvolkov@yandex.ru
ResearcherID-Numbers	Povzner, Aleksandr/A-4625-2016
ORCID-Numbers	Volkov, Arkadij/0000-0002-6698-0238
Number-of-Cited-References	14
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	3
Journal-ISO	J. Magn. Magn. Mater.
Doc-Delivery-Number	ES5RT