Open AccessCritical phenomenon of the near room temperature skyrmion material FeGe
Author(s) -
Lei Zhang,
Hui Han,
Gao Min,
Haifeng Du,
Chan Jin,
Wensen Wei,
Jiyu Fan,
Changjin Zhang,
Li Pi,
Yuheng Zhang
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep22397
Subject(s) - skyrmion , condensed matter physics , critical exponent , scaling , physics , spintronics , anisotropy , magnetization , nonlinear system , critical phenomena , heisenberg model , phase transition , magnetic field , ferromagnetism , quantum mechanics , mathematics , geometry
The cubic B20 compound FeGe, which exhibits a near room temperature skyrmion phase, is of great importance not only for fundamental physics such as nonlinear magnetic ordering and solitons but also for future application of skyrmion states in spintronics. In this work, the critical behavior of the cubic FeGe is investigated by means of bulk dc-magnetization. We obtain the critical exponents ( β = 0.336 ± 0.004, γ = 1.352 ± 0.003 and β = 5.276 ± 0.001), where the self-consistency and reliability are verified by the Widom scaling law and scaling equations. The magnetic exchange distance is found to decay asr −4.9 , which is close to the theoretical prediction of 3D-Heisenberg model (r −5 ). The critical behavior of FeGe indicates a short-range magnetic interaction. Meanwhile, the critical exponents also imply an anisotropic magnetic coupling in this system.