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Published on: March 24, 2019
Anisotropy of antiferromagnetic 180 degrees domains in LiCoPO4 and LiNiPO4
Bas B Van Aken1, J P Rivera, H Schmid
1HISKP, Universität Bonn, Nussallee 14-16, 53115 Bonn, Germany.
Abstract:
Unexpected three-dimensional distributions of antiferromagnetic 180 degrees domains are observed in LiCoPO4 and LiNiPO4 by optical second harmonic generation. Domains in LiCoPO4 are isotropic in spite of the quasi-two-dimensional magnetic structure whereas domains in LiNiPO4 are distinctly anisotropic, but in contrast to the anisotropy of the magnetic structure. The diversity reveals a potential for fine-tuning magnetic properties determined by the distribution of domains or domain walls and the urgent need for an improved understanding of spatial correlations in antiferromagnets.
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