Publication details for Professor Tom LancasterGhannadzadeh, 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. (2013). Evolution of magnetic interactions in a pressure-induced Jahn-Teller driven magnetic dimensionality switch. Physical Review B 87(24): 241102.
- Publication type: Journal Article
- ISSN/ISBN: 1098-0121, 1550-235X
- DOI: 10.1103/PhysRevB.87.241102
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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.