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Control of Chiral Magnetism Through Electric Fields in Multiferroic Compounds above the Long-Range Multiferroic Transition

J. Stein, M. Baum, S. Holbein, T. Finger, T. Cronert, C. Tölzer, T. Fröhlich, S. Biesenkamp, K. Schmalzl, P. Steffens, C. H. Lee, and M. Braden
Phys. Rev. Lett. 119, 177201 – Published 26 October 2017
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Abstract

Polarized neutron scattering experiments reveal that type-II multiferroics allow for controlling the spin chirality by external electric fields even in the absence of long-range multiferroic order. In the two prototype compounds TbMnO3 and MnWO4, chiral magnetism associated with soft overdamped electromagnons can be observed above the long-range multiferroic transition temperature TMF, and it is possible to control it through an electric field. While MnWO4 exhibits chiral correlations only in a tiny temperature interval above TMF, in TbMnO3 chiral magnetism can be observed over several kelvin up to the lock-in transition, which is well separated from TMF.

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  • Received 24 March 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.177201

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Synopsis

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Chiral Magnetism Under Electric Control

Published 26 October 2017

An applied electric field can be used to control a twisted form of magnetic ordering inside small domains of multiferroic materials.

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Authors & Affiliations

J. Stein1, M. Baum1,†, S. Holbein1,2, T. Finger1, T. Cronert1, C. Tölzer1, T. Fröhlich1, S. Biesenkamp1, K. Schmalzl3, P. Steffens2, C. H. Lee4, and M. Braden1,*

  • 1II. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
  • 2Institut Laue-Langevin, 71 avenue des Martyrs, 38000 Grenoble, France
  • 3Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH, Outstation at Institut Laue-Langevin, 71 avenue des Martyrs, 38000 Grenoble, France
  • 4National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan

  • *braden@ph2.uni-koeln.de
  • Present address: Fraunhofer INT, Euskirchen, Germany.

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Issue

Vol. 119, Iss. 17 — 27 October 2017

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