Field-induced magnetic phases and electric polarization in LiNiPO4

被引：53

作者：

Jensen, Thomas Bagger Stibius ^{[1
]}

Christensen, Niels Bech ^{[1
,2
,3
]}

Kenzelmann, Michel ^{[2
,3
,4
]}

Ronnow, Henrik Moodysson ^{[2
,3
,5
]}

Niedermayer, Christof ^{[2
,3
]}

Andersen, Niels Hessel ^{[1
]}

Lefmann, Kim ^{[1
]}

Schefer, Juerg ^{[2
,3
]}

Von Zimmermann, Martin ^{[6
]}

Li, Jiying ^{[7
,8
]}

Zarestky, Jerel L. ^{[7
,8
]}

Vaknin, David ^{[7
,8
]}

机构：

[1] Tech Univ Denmark, Mat Res Div, Riso DTU, DK-4000 Roskilde, Denmark

[2] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[4] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[5] Ecole Polytech Fed Lausanne, Lab Quantum Magnetism, CH-1015 Lausanne, Switzerland

[6] DESY, Hamburger Synchrotronstrahlungslabor, D-22603 Hamburg, Germany

[7] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[8] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 09期

基金：

瑞士国家科学基金会;

关键词：

antiferromagnetism; lithium compounds; magnetic structure; magnetic transitions; magnetoelastic effects; magnetoelectric effects; neutron diffraction; nickel compounds; MULTIFERROICS; LICOPO4;

D O I：

10.1103/PhysRevB.79.092412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron diffraction is used to probe the (H,T) phase diagram of magnetoelectric (ME) LiNiPO4 for magnetic fields along the c axis. At zero field the Ni spins order in two antiferromagnetic phases. One has commensurate (C) structures and general ordering vectors k(C)=(0,0,0); the other one is incommensurate (IC) with k(IC)=(0,q,0). At low temperatures the C order collapses above mu H-0=12 T and adopts an IC structure with modulation vector parallel to k(IC). We show that C order is required for the ME effect and establish how electric polarization results from a field-induced reduction in the total magnetoelastic energy.

引用

页数：4

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