Large off-diagonal magnetoelectric coupling in the quantum paraelectric antiferromagnet EuTiO3

被引：91

作者：

Shvartsman, V. V. ^{[1
]}

Borisov, P. ^{[1
]}

Kleemann, W. ^{[1
]}

Kamba, S. ^{[2
]}

Katsufuji, T. ^{[3
]}

机构：

[1] Univ Duisburg Essen, D-47048 Duisburg, Germany

[2] ASCR, Inst Phys, Prague 18221 8, Czech Republic

[3] Waseda Univ, Dept Phys, Shinjuku Ku, Tokyo 1698555, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 06期

关键词：

SUSCEPTIBILITY; BIREFRINGENCE; SYMMETRY;

D O I：

10.1103/PhysRevB.81.064426

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The third-order (EH2)-H-2-type magnetoelectric (ME) response of polycrystalline EuTiO3 changes sign under magnetic bias and shows a large anomaly at the antiferromagnetic (AF)-paramagnetic phase boundary below T-N approximate to 5.3 K. It is attributed to critical fluctuations of the AF order parameter reinforced by quantum paraelectric polar correlations. The underlying biquadratic spin-lattice coupling involves electric field induced Dzyaloshinskii-Moriya interaction as described within mean-field approximation. Single domaining by ME annealing (or cooling) significantly enhances the response by additional EH and EH2 effects.

引用

页数：4

共 30 条

[11]

FERRE J, 1984, REP PROG PHYS, V47, P513, DOI 10.1088/0034-4885/47/5/002

[12]

FIEGIG M, 2005, J PHYS D, V38, pR123

[13] Polar phonon mixing in magnetoelectric EuTiO3 [J].