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Tuning the metamagnetism of an antiferromagnetic metal
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Staunton, Julie B., dos Santos Dias, Manuel, Peace, Jonathan, Gercsi, Z. and Sandeman, K. G. (2013) Tuning the metamagnetism of an antiferromagnetic metal. Physical Review B (Condensed Matter and Materials Physics), Volume 87 (Number 6). Article no. 060404. doi:10.1103/PhysRevB.87.060404 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.87.060404
Abstract
We describe a `disordered local moment' (DLM) first-principles electronic structure theory which demonstrates that tricritical metamagnetism can arise in an antiferromagnetic metal due to the dependence of local moment interactions on the magnetisation state. Itinerant electrons can therefore play a defining role in metamagnetism in the absence of large magnetic anisotropy. Our model is used to accurately predict the temperature dependence of the metamagnetic critical fields in CoMnSi-based alloys, explaining the sensitivity of metamagnetism to Mn-Mn separations and compositional variations found previously. We thus provide a
finite-temperature framework for modelling and predicting new metamagnets of interest in applications such as magnetic cooling.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Antiferromagnetism, Metals -- Magnetic properties | ||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1098-0121 | ||||
Official Date: | 13 February 2013 | ||||
Dates: |
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Volume: | Volume 87 | ||||
Number: | Number 6 | ||||
Page Range: | Article no. 060404 | ||||
DOI: | 10.1103/PhysRevB.87.060404 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 24 December 2015 | ||||
Date of first compliant Open Access: | 24 December 2015 | ||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), Fundação para a Ciência e a Tecnologia (FCT), Royal Society (Great Britain) | ||||
Grant number: | EP/G060940/1 (EPSRC), EP/E016243/1 (EPSRC), SFRH/BD/35738/2007 (FCT) |
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