Field-induced reentrant magnetoelectric phase in LiNiPO4

Rasmus Toft-Petersen, Ellen Fogh, Takumi Kihara, Jens Jensen, Katharina Fritsch, Jooseop Lee, Garrett E. Granroth, Matthew B. Stone, David Vaknin, Hiroyuki Nojiri, and Niels Bech Christensen
Phys. Rev. B 95, 064421 – Published 21 February 2017

Abstract

Using pulsed magnetic fields up to 30T we have measured the bulk magnetization and electrical polarization of LiNiPO4 and have studied its magnetic structure by time-of-flight neutron Laue diffraction. Our data establish the existence of a reentrant magnetoelectric phase between 19T and 21T. We show that a magnetized version of the zero field commensurate structure explains the magnetoelectric response quantitatively. The stability of this structure suggests a field-dependent spin anisotropy. Above 21T, a magnetoelectrically inactive, short-wavelength incommensurate structure is identified. Our results demonstrate the combination of pulsed fields with epithermal neutron Laue diffraction as a powerful method to probe even complex phase diagrams in strong magnetic fields.

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  • Received 1 April 2016
  • Revised 20 January 2017

DOI:https://doi.org/10.1103/PhysRevB.95.064421

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Rasmus Toft-Petersen1,*, Ellen Fogh2, Takumi Kihara3, Jens Jensen4, Katharina Fritsch1, Jooseop Lee5, Garrett E. Granroth6, Matthew B. Stone5, David Vaknin7, Hiroyuki Nojiri3, and Niels Bech Christensen2

  • 1Helmholtz Zentrum Berlin für Materialien und Energie, D-14109 Berlin, Germany
  • 2Department of Physics, Technical University of Denmark, DK-2880 Kongens Lyngby, Denmark
  • 3Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 4Niels Bohr Institute, Universitetsparken 5, DK-2100 Copenhagen, Denmark
  • 5Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 6Neutron Data Analysis and Visualization Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 7Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • *Present address: Department of Physics, Technical University of Denmark, DK-2880 Kongens Lyngby, Denmark.

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Issue

Vol. 95, Iss. 6 — 1 February 2017

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