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Influence of classical anisotropy fields on the properties of Heisenberg antiferromagnets within unified molecular field theory

TitleInfluence of classical anisotropy fields on the properties of Heisenberg antiferromagnets within unified molecular field theory
Publication TypeJournal Article
Year of Publication2017
AuthorsJohnston, DC
JournalPhysical Review B
Volume96
Pagination36
Date Published12
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000418653500008
Keywordsmnf2, physics
Abstract

0 in the H-z-T plane are constructed for spins S = 1/2. For h(A1) = 0, the SF phase is stable at low field and the PM phase at high field with no AFM phase present. As h(A1) increases, the phase diagram contains the AFM, SF, and PM phases. Further increases in h(A1) lead to the disappearance of the SF phase and the appearance of a tricritical point on the AFM-PM transition curve. Applications of the theory to extract h(A1) from experimental low-field magnetic susceptibility data and high-field magnetization versus field isotherms for single crystals of AFMs are discussed.

DOI10.1103/PhysRevB.96.224428
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Complex States