Magnetic Structure and Dielectric State in the Multiferroic Ca${}_2$CoSi${}_2$O${}_7$

Abstract

Magnetic structure of the multiferroic Ca${}_2$CoSi${}_2$O${}_7$ was determined by neutron diffraction techniques. Combination of the polycrystalline and single-crystal samples experiments revealed a collinear antiferromagnetic structure with the easy axis along $<$100$>$ directions. The dielectric state was discussed in the framework of the spin-dependent $d$-$p$ hybridization mechanism, leading to the realization of the antiferroelectric structure. The origin of the magnetic anisotropy was discussed in comparison with the isostructural Ba${}_2$CoGe${}_2$O${}_7$.

5 pages, 5 figures

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Cited by in corpus (1)

• 51V-NMR study on the S=1/2 square lattice antiferromagnet K2V3O8