Origin of the magnetoelectric effect in the Cs2FeCl5·D2O compound

Oscar Fabelo, J. Alberto Rodríguez-Velamazán, Laura Canadillas-Delgado, Lidia Mazzuca, Javier Campo, Ángel Millán, Laurent C. Chapon, and Juan Rodríguez-Carvajal
Phys. Rev. B 96, 104428 – Published 21 September 2017
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Abstract

Cs2FeCl5·D2O has been identified as a linear magnetoelectric material, although the correlation of this property with the magnetic structures of this compound has not been adequately studied. We have used single-crystal and powder neutron diffraction to obtain detailed information about its nuclear and magnetic structures. From the nuclear structure analysis, we describe the occurrence of a phase transition related to the reorganization of the [FeCl5·D2O]2 ions and the Cs+ counterion. The magnetic structure was determined at zero magnetic field at 1.8 K using single-crystal diffraction and its temperature evolution was recorded using powder diffraction. The symmetry analysis of the magnetic structure is compatible with the occurrence of the magnetoelectric effect. Moreover, the evolution of the magnetic structure as a function of the external magnetic field has also been studied. The reorientation of the magnetic moments under applied external field along the easy axis (b axis at low temperature) is compatible with the occurrence of a spin-flop transition. The application of a magnetic field below TN compels the magnetic moments to flip from the b axis to the ac plane (with a small induced component along the b axis), for a critical magnetic field of ca. 1.2 T.

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  • Received 23 May 2017
  • Revised 21 July 2017

DOI:https://doi.org/10.1103/PhysRevB.96.104428

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Oscar Fabelo1,*, J. Alberto Rodríguez-Velamazán1,2, Laura Canadillas-Delgado1,3, Lidia Mazzuca1, Javier Campo2, Ángel Millán2, Laurent C. Chapon1, and Juan Rodríguez-Carvajal1

  • 1Institut Laue Langevin, 71 Avenue des Martyrs, CS 20156, Cedex 9, Grenoble, 38042, France
  • 2Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, C/ Pedro Cerbuna 12, Zaragoza, 50009, Spain
  • 3Centro Universitario de la Defensa de Zaragoza, Carretera de Huesca s/n. 50090 Zaragoza, Spain

  • *fabelo@ill.fr

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Issue

Vol. 96, Iss. 10 — 1 September 2017

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