Spin-reorientation and multidomain states in the spin-flop region of uniaxial antiferromagnets

Based on an effective phenomenological energy, a strongly pronounced two-scale character is demonstrated for magnetic states of easy-axis antiferromagnets. Near the spin-flop field, magnetic properties are determined by weaker interaction terms than those in the major part of the magnetic phase diag...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2005-04, Vol.290-291, p.768-771, Article 768
Main Authors: Bogdanov, A.N., Zhuravlev, A.V., Zhikharev, I.V., Rößler, U.K.
Format: Article
Language:English
Subjects:
Antiferromagnets
Domains
Spin-flop
Susceptibility—field dependent
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Summary:Based on an effective phenomenological energy, a strongly pronounced two-scale character is demonstrated for magnetic states of easy-axis antiferromagnets. Near the spin-flop field, magnetic properties are determined by weaker interaction terms than those in the major part of the magnetic phase diagram. Field and angular dependencies of the magnetic susceptibility tensor are calculated for homogeneous and multidomain states. Their peculiarities in the vicinity of the spin-flop can be employed for investigations on magnetic states and material parameters of easy-axis antiferromagnets. Corresponding experiments on the orthorhombic layered antiferromagnet (C2H5NH3)2CuCl4 are presented. The evolution of multidomain states and their phase boundaries are determined in the spin-flop region.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2004.11.350