Barker, J orcid.org/0000-0003-4843-5516 and Mryasov, O (2016) The role of spin fluctuations in the anomalous anisotropy of MnBi. Journal of Physics D: Applied Physics, 49 (48). 484002. ISSN 0022-3727
Abstract
MnBi is unusual for having a magnetic anisotropy energy which increases with temperature. Recent theoretical works have studied how the lattice effects the anisotropy. However, the role of spin fluctuations has been hitherto overlooked, even though this is the primary mechanism for the temperature dependence of anisotropy in magnetic materials. We have created a model of MnBi including all anisotropy terms which are indicated from experiments and theory. Parameterizing based on experimental measurements we used the Callen–Callen theory to calculate the temperature dependence of the magnetic anisotropy due to spin fluctuations. An excellent agreement is found with experiments, across the entire temperature range. Our results indicate the driving force to be the competition between in-plane single ion and out of plane two-ion anisotropies.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 IOP Publishing Ltd. This is an author produced version of a paper published in Journal of Physics D: Applied Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | MnBi; anisotropy; theory |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 Oct 2018 10:40 |
Last Modified: | 23 Oct 2018 10:40 |
Status: | Published |
Publisher: | IOP Publishing |
Identification Number: | 10.1088/0022-3727/49/48/484002 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:137514 |