Successive phase transitions and phase diagrams for the quasi-two-dimensional easy-axis triangular antiferromagnet Rb ₄ Mn(MoO ₄ ) ₃

Abstract

Comprehensive experimental studies by magnetic, thermal and neutron\nmeasurements have clarified that Rb4Mn(MoO4)3 is a model system of a quasi-2D\ntriangular Heisenberg antiferromagnet with an easy-axis anisotropy, exhibiting\nsuccessive transitions across an intermediate collinear phase. As a rare case\nfor geometrically frustrated magnetism, quantitative agreement between\nexperiment and theory is found for complete, anisotropic phase diagrams as well\nas magnetic properties.\n