Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/103160
Title: Phase transitions induced by concentration and thermodynamic magnetic fluctuations in chiral ferromagnets Fe1-xCoxSi
Authors: Povzner, A.
Volkov, A.
Nogovitsyna, T.
Bessonov, S.
Issue Date: 2021
Publisher: American Institute of Physics Inc.
Citation: Phase transitions induced by concentration and thermodynamic magnetic fluctuations in chiral ferromagnets Fe1-xCoxSi / A. Povzner, A. Volkov, T. Nogovitsyna, et al. — DOI 10.1063/9.0000071 // AIP Advances. — 2021. — Vol. 11. — Iss. 1. — 015024.
Abstract: Taking into account the results of LDA+U+SO-modeling of the electronic structure of Fe1-xCoxSi, temperature-prolonged magnetic phase transitions of the first order in strongly correlated alloys with a broken crystal structure of the B20 type are investigated. It is shown that such phase transitions are induced by concentration and thermodynamic fluctuations for compositions with 0.2<x<0.65 and are accompanied by a change in the sign of the mode-mode coupling parameter. In this case, an intermediate region appears between the long-range order phases and the paramagnetic phase, with the short-range spin order characterized by ferromagnetic and helicoidal spatial fluctuations. We have defined the intervals of external magnetic fields, at which skyrmion microstructures spatially limited by the crossover of helicoidal and ferromagnetic fluctuations appear in the considered region of the extended phase transition. The peculiarities of the temperature dependences of the magnetic susceptibility in an external magnetic field, characteristic of the appearance of skyrmions, are obtained. © 2021 Author(s).
Keywords: CRYSTAL STRUCTURE
ELECTRONIC STRUCTURE
FERROMAGNETIC MATERIALS
FERROMAGNETISM
MAGNETIC FIELDS
MAGNETIC SUSCEPTIBILITY
SPIN FLUCTUATIONS
TEMPERATURE DISTRIBUTION
EXTERNAL MAGNETIC FIELD
FERROMAGNETIC FLUCTUATION
MAGNETIC FLUCTUATION
MAGNETIC PHASE TRANSITIONS
PARAMAGNETIC PHASE
SPATIAL FLUCTUATION
TEMPERATURE DEPENDENCE
THERMODYNAMIC FLUCTUATIONS
PHASE TRANSITIONS
URI: http://hdl.handle.net/10995/103160
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85099496757
PURE ID: 20516707
d0141a65-3ad7-4eda-b185-c05820c91efd
ISSN: 21583226
DOI: 10.1063/9.0000071
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

Files in This Item:
File Description SizeFormat 
2-s2.0-85099496757.pdf5,61 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.