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Evolution of magnetic interactions in a pressure-induced Jahn-Teller driven magnetic dimensionality switch

Ghannadzadeh, S.; Möller, J.S.; Goddard, P.A.; Lancaster, T.; Xiao, F.; Blundell, S.J.; Maisuradze, A.; Khasanov, R.; Manson, J.L.; Tozer, S.W.; Graf, D.; Schlueter, J.A.

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Authors

S. Ghannadzadeh

J.S. Möller

P.A. Goddard

F. Xiao

S.J. Blundell

A. Maisuradze

R. Khasanov

J.L. Manson

S.W. Tozer

D. Graf

J.A. Schlueter



Abstract

We present the results of high-field magnetization and muon-spin relaxation measurements on the coordination polymer CuF 2 (H 2 O) 2 (pyrazine) in pressures up to 22.5 kbar. We observe a transition from a quasi-two-dimensional to a quasi-one-dimensional antiferromagnetic phase at 9.1 kbar, driven by a rotation of the Jahn-Teller axis. Long-range antiferromagnetic ordering is seen in both regimes, as well as a phase separation in the critical pressure region. The magnetic dimensionality switching as pressure is increased is accompanied by a halving of the primary magnetic exchange energy J and a fivefold decrease in the ordering temperature T N . J decreases gradually with pressure in the two-dimensional phase, and then increases in the one-dimensional regime. We relate both effects to the changes in the crystal structure with applied pressure.

Citation

Ghannadzadeh, S., Möller, J., Goddard, P., Lancaster, T., Xiao, F., Blundell, S., …Schlueter, J. (2013). Evolution of magnetic interactions in a pressure-induced Jahn-Teller driven magnetic dimensionality switch. Physical review B, 87(24), Article 241102. https://doi.org/10.1103/physrevb.87.241102

Journal Article Type Article
Publication Date Jun 1, 2013
Deposit Date Jul 2, 2013
Publicly Available Date Jan 24, 2014
Journal Physical Review B
Print ISSN 1098-0121
Electronic ISSN 1550-235X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 87
Issue 24
Article Number 241102
DOI https://doi.org/10.1103/physrevb.87.241102
Public URL https://durham-repository.worktribe.com/output/1472959

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Copyright Statement
© 2013 American Physical Society






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