A Method to Calculate Critical Magnetic Field of PM-FM Transformation

doi:10.19596/j.cnki.1001-246x.7857

CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2019, Vol. 36 ›› Issue (4): 421-426.DOI: 10.19596/j.cnki.1001-246x.7857

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A Method to Calculate Critical Magnetic Field of PM-FM Transformation

MA Wenjie, ZHANG Ping

Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Received:2018-03-14 Revised:2018-06-13 Online:2019-07-25 Published:2019-07-25

Abstract

Abstract: Based on linear spin wave approximation and Hellmann-Feynman theorem, we introduce a method to calculate critical magnetic field where the ground state transforms into a fully polarized ferromagnetism as magnetic field is applied. To confirm our method, we apply it to two models and compare results with numerical data.

Key words: critical magnetic field, linear spin wave, spontaneous symmetry breaking, Hellmann-Feynman, magnon

CLC Number:

O469

MA Wenjie, ZHANG Ping. A Method to Calculate Critical Magnetic Field of PM-FM Transformation[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2019, 36(4): 421-426.

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A Method to Calculate Critical Magnetic Field of PM-FM Transformation

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