Pressure-induced transition in the multiferroic $\mathrm{CoC}{\mathrm{r}}_{2}{\mathrm{O}}_{4}$ spinel

Pressure-induced transition in the multiferroic $CoC r_{2} O_{4}$ spinel

I. Efthimiopoulos, Z. T. Y. Liu, S. V. Khare, P. Sarin, T. Lochbiler, V. Tsurkan, A. Loidl, D. Popov, and Y. Wang

Phys. Rev. B 92, 064108 – Published 12 August 2015

Abstract

We have explored the high-pressure structural, vibrational, electronic, and magnetic behavior of the multiferroic $CoC r_{2} O_{4}$ spinel up to 30 GPa by means of x-ray diffraction, Raman spectroscopy, and density functional theory calculations. Our investigations revealed a reversible tetragonal distortion of the starting cubic structure above 16 GPa. We suggest that the structural modification is mainly driven by magnetic effects induced under pressure. The results obtained are compared with the high-pressure behavior of related spinels.

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Received 7 May 2015
Revised 25 June 2015

DOI:https://doi.org/10.1103/PhysRevB.92.064108

Authors & Affiliations

I. Efthimiopoulos^1,*, Z. T. Y. Liu², S. V. Khare², P. Sarin³, T. Lochbiler¹, V. Tsurkan^4,5, A. Loidl⁴, D. Popov⁶, and Y. Wang^1,†

¹Department of Physics, Oakland University, Rochester, Michigan 48309, USA
²Department of Physics, University of Toledo, Toledo, Ohio 43606, USA
³School of Materials Science and Engineering, Oklahoma State University, Tulsa, Oklahoma 74106, USA
⁴Experimental Physics 5, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86159 Augsburg, Germany
⁵Institute of Applied Physics, Academy of Sciences of Moldova, MD 2028 Chisinau, Republic of Moldova
⁶High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA

^*Corresponding author: iliefthi@gmail.com
^†Corresponding author: ywang235@oakland.edu

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Vol. 92, Iss. 6 — 1 August 2015

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Physical Review B

covering condensed matter and materials physics

Pressure-induced transition in the multiferroic $CoC r_{2} O_{4}$ spinel

I. Efthimiopoulos, Z. T. Y. Liu, S. V. Khare, P. Sarin, T. Lochbiler, V. Tsurkan, A. Loidl, D. Popov, and Y. Wang

Phys. Rev. B 92, 064108 – Published 12 August 2015

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Physical Review B

covering condensed matter and materials physics

Pressure-induced transition in the multiferroic CoCr2O4 spinel

I. Efthimiopoulos, Z. T. Y. Liu, S. V. Khare, P. Sarin, T. Lochbiler, V. Tsurkan, A. Loidl, D. Popov, and Y. Wang

Phys. Rev. B 92, 064108 – Published 12 August 2015

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Pressure-induced transition in the multiferroic $CoC r_{2} O_{4}$ spinel