Electronic Structure and Magnetic Phase Transition in MnSi / Povzner A. A.,Volkov A. G.,Nogovitsyna T. A. // PHYSICS OF THE SOLID STATE. - 2017. - V. 59, l. 7. - P. 1285-1290.

ISSN/EISSN:

1063-7834 / 1090-6460

Type:

Article

Abstract:

Temperature variations of the amplitude of zero-point and thermal spin fluctuations in a helicoidal ferromagnetic (MnSi) are characterized using the electronic structure model that follows from ab initio LDA + U + SO calculations. It is found that a drastic reduction in the amplitude of zero-point spin fluctuations at temperature T (S) (in the vicinity of the magnetic phase transition) leads to ferromagnetic solution instability (a change in the sign of the intermode interaction parameter). The observed magnetovolume effect and a sharp change in the radius of spin correlations have the same underlying cause. The results of calculation of the volumetric coefficient of thermal expansion agree well with the observed anomaly in the region of the magnetic phase transition.

Author keywords:

HELICAL FERROMAGNET MNSI; SPIN FLUCTUATIONS

DOI:

10.1134/S1063783417070186

Web of Science ID:

ISI:000405713400003

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6460
Keywords-Plus	HELICAL FERROMAGNET MNSI; SPIN FLUCTUATIONS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	a.a.povzner@urfu.ru
ResearcherID-Numbers	Povzner, Aleksandr/A-4625-2016
Number-of-Cited-References	19
Usage-Count-Last-180-days	9
Usage-Count-Since-2013	9
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	FA8RL