Volume 94, Number 1, April 2011
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||31 March 2011|
Successive phase transitions and phase diagrams for the quasi-two-dimensional easy-axis triangular antiferromagnet Rb4Mn(MoO4)3
Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa - Chiba 277-8581, Japan
2 Department of Physics, Kyoto University - Kyoto 606-8502, Japan
3 Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University Baltimore, MD 21218, USA
4 NIST Center for Neutron Research, National Institute of Standards and Technology (NIST) Gaithersburg, MD 20899, USA
5 Department of Chemistry, Louisiana State University - Baton Rouge, LA 70803, USA
Accepted: 3 March 2011
Using magnetic, thermal and neutron measurements we show that Rb4Mn(MoO4)3 is a quasi-2D triangular Heisenberg antiferromagnet with easy-axis anisotropy and successive transitions bracketing an intermediate collinear phase. An accurate quantitative account of the phase diagram is achieved through Monte Carlo simulation of a spin Hamiltonian with easy-axis anisotropy D=0.22J.
PACS: 75.10.Hk – Classical spin models / 75.40.Cx – Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) / 75.50.Ee – Antiferromagnetics
© EPLA, 2011
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