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Determination of the exchange anisotropy in perovskite antiferromagnets using powder inelastic neutron scattering

TitleDetermination of the exchange anisotropy in perovskite antiferromagnets using powder inelastic neutron scattering
Publication TypeJournal Article
Year of Publication2008
AuthorsMcQueeney RJ, Yan JQ, Chang S, Ma J
Journal TitlePhysical Review B
Volume78
Pages184417
Date Published11/01
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000261214800063
Abstract

A procedure is outlined for the determination of magnetic exchange constants in anisotropic perovskite anitferromagnets using powder inelastic neutron scattering. Spin-wave densities of states are measured using time-of-flight inelastic neutron scattering for LaMnO3 (A-type antiferromagnet), LaVO3 (C type), and LaFeO3 (G type) and compared to Heisenberg model calculations. The anisotropy of in-plane (J(ab)) and out-of-plane (J(c)) exchange constants can be obtained from the data. The procedure quickly determines the magnetic exchange interactions without the need for single-crystal dispersion measurements and allows for rapid systematic studies of the evolution of magnetism in perovskite systems.
DOI10.1103/PhysRevB.78.184417
Alternate JournalPhys. Rev. B