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CaBaCo$_4$O$_7$ : A ferrimagnetic pyroelectric

Abstract:
Magneto-electric coupling in pyroelectric CaBaCo$_4$O$_7$ is investigated using ab-intio calculations and Landau theory. The former shows that exchange-striction is strong enough to produce a giant change in electric polarization upon ferrimagnetic ordering, comparable to the experimentally determined value of ~17 mC/m$^2$ . Furthermore, Landau theory demonstrates that magneto-elastic coupling in CaBaCo$_4$O$_7$ is responsible for the strong magneto-electric coupling appearing close to the magnetic phase transition.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.90.045129

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
Publisher:
American Physical Society
Journal:
PHYSICAL REVIEW B
Volume:
90
Issue:
4
Publication date:
2014-03-03
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:fa80d41a-74c4-4675-ae7c-d7a2de0166d2
Source identifiers:
455918
Local pid:
pubs:455918
Language:
English
Keywords:

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