Melting of incommensurate-ferroelectric phase with magnetic field in multiferroic TbMnO3

被引：31

作者：

Argyriou, D. N.

Aliouane, N.

Strempfer, J.

Zegkinoglou, I.

Bohnenbuck, B.

Habicht, K.

Zimmermann, M. V.

机构：

[1] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[3] DESY, HASYLAB, D-22603 Hamburg, Germany

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.75.020101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the reentrant ferroelectric behavior of TbMnO3 under a c-axis-aligned magnetic field (H parallel to c) using neutron and x-ray single-crystal diffraction. We find that below T-N=41 K and at high field the incommensurate ordering of Mn spins melts and coincides with the disappearance of ferroelectricity. The paraelectric phase which emerges is characterized by a simple commensurate antiferomagnetic ordering. We suggest that the reentrance of ferroelectricity at low temperatures and high magnetic field coincides with the development of incommensurate Mn- and Tb-spin ordering.

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页数：4

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