Publication details for Professor Tom LancasterLancaster, T., Blundell, S.J., Baker, P.J., Hayes, W., Giblin, S.R., McLain, S.E., Pratt, F.L., Salman, Z., Jacobs, E.A., Turner, J.F.C. & Barnes, T. (2007). Intrinsic magnetic order in Cs2AgF4 detected by muon-spin relaxation. Physical review B 75(22): 220408(R).
- Publication type: Journal Article
- ISSN/ISBN: 1098-0121, 1550-235X
- DOI: 10.1103/PhysRevB.75.220408
- Further publication details on publisher web site
Author(s) from Durham
We present the results of a muon-spin relaxation study of the high-Tc analog material Cs2AgF4. We find unambiguous evidence for magnetic order, intrinsic to the material, below TC=13.95(3)K. The ratio of interplane to intraplane coupling is estimated to be ∣∣J′/J∣=1.9×10−2, while fits of the temperature dependence of the order parameter reveal a critical exponent β=0.292(3), implying an intermediate character between pure two- and three-dimensional magnetism in the critical regime. Above TC we observe a signal characteristic of dipolar interactions due to linear F−μ+−F bonds, allowing the muon stopping sites in this compound to be characterized.