NONEQUILIBRIUM PHASE TRANSITIONS IN FERROMAGNETIC SEMICONDUCTORS (EuO1-delta) / Volkov A. G.,Povzner A. A.,Cherepanova A. N. // RUSSIAN PHYSICS JOURNAL. - 2009. - V. 52, l. 9. - P. 984-989.

ISSN/EISSN:

1064-8887 / нет данных

Type:

Article

Abstract:

The features of metal. semiconductor kinetic phase transformation in ferromagnetic semiconductors are studied. It is shown that heat release caused by current results in a positive feedback between the current density and the sample temperature, magnetization, and thermal-spin fluctuation amplitude. The Joule heating of the sample leads to disappearance of magnetization and, as a result, to restoration of the forbidden band between the conduction and valence bands. However, the energy gap width continues to change due to an increase in the fluctuations of internal exchange fields splitting the electron states. Within the framework of the developed model, an S-shaped volt-ampere characteristic is obtained for a EuO1-delta, ferromagnetic semiconductor. The lower branch of the characteristic corresponds to a ferromagnetic metal state (a ``cold{''} phase) and the upper one is due to a semiconductor paramagnetic state (a ``hot{''} phase).

Author keywords:

metal-semiconductor kinetic phase transformation; ferromagnetic semiconductor; spin fluctuations

DOI:

нет данных

Web of Science ID:

ISI:000274854000013

Соавторы в МНС:

Другие поля

Поле	Значение
Month	SEP
Publisher	SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	povz@kf.ustu.ru
ResearcherID-Numbers	Povzner, Aleksandr/A-4625-2016 Volkov, Arkadij/A-1980-2016
ORCID-Numbers	Volkov, Arkadij/0000-0002-6698-0238
Number-of-Cited-References	9
Usage-Count-Since-2013	2
Journal-ISO	Russ. Phys. J.
Doc-Delivery-Number	559UR