Department of Physics Papers

Document Type

Journal Article

Date of this Version

8-19-2005

Publication Source

Physical Review Letters

Volume

95

Start Page

087206-1

Last Page

087206-4

DOI

10.1103/PhysRevLett.95.087206

Abstract

TbMnO3 is an orthorhombic insulator where incommensurate spin order for temperature TN<41  K is accompanied by ferroelectric order for T<28  K. To understand this, we establish the magnetic structure above and below the ferroelectric transition using neutron diffraction. In the paraelectric phase, the spin structure is incommensurate and longitudinally modulated. In the ferroelectric phase, however, there is a transverse incommensurate spiral. We show that the spiral breaks spatial inversion symmetry and can account for magnetoelectricity in TbMnO3.

Included in

Physics Commons

Share

COinS
 

Date Posted: 20 August 2015

This document has been peer reviewed.