title: Anisotropy of antiferromagnetic 180 degrees domains in LiCoPO4 and LiNiPO4.
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.
authors.affiliation: HISKP, Universität Bonn, Nussallee 14-16, 53115 Bonn, Germany.
authors.forename: Bas B
authors.initials: BB
authors.lastname: Van Aken
authors.forename: J P
authors.initials: JP
authors.lastname: Rivera
authors.forename: H
authors.initials: H
authors.lastname: Schmid
authors.forename: M
authors.initials: M
authors.lastname: Fiebig