Successive magnetic transitions of Ca${}_2$CoSi${}_2$O${}_7$ in high magnetic fields

Abstract

Magnetic and dielectric properties of åkermanite Ca${}_2$CoSi${}_2$O${}_7$ single crystals were investigated in pulsed high magnetic fields. In magnetic fields along the $c$ axis, this material shows a magnetization plateau in a wide range of field below the saturation. Magnetization processes for fields along the $a$ and $b$ axes show multiple anomalies but different traces to each other, indicating the breaking of four-fold symmetry. Measurements of the magnetoelectric effects exhibit the changes in electric polarization according to the changes in the spin system. The experimentally determined quadratic magnetoelectric tensor is consistent with that expected in the crystal symmetry of orthorhombic $P{2}_1{2}_{1}2$.

arXiv comment11 pages, 5 figures

References in corpus (10)

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Cited by in corpus (3)

• Direct observation of spin-quadrupolar excitations in Sr${}_2$CoGe${}_2$O${}_7$ by high field ESR
• Magnetic Structure and Dielectric State in the Multiferroic Ca${}_2$CoSi${}_2$O${}_7$
• Field-induced electric polarization and elastic softening caused by parity-mixed $d$-$p$ hybridized states with electric multipoles in Ba${}_2$CuGe${}_2$O${}_7$