Magnetoelectric effect and phase transitions in CuO in external magnetic fields

Nature Communications
Zhaosheng WangVassil Skumryev

Abstract

Apart from being so far the only known binary multiferroic compound, CuO has a much higher transition temperature into the multiferroic state, 230 K, than any other known material in which the electric polarization is induced by spontaneous magnetic order, typically lower than 100 K. Although the magnetically induced ferroelectricity of CuO is firmly established, no magnetoelectric effect has been observed so far as direct crosstalk between bulk magnetization and electric polarization counterparts. Here we demonstrate that high magnetic fields of ≈ 50 T are able to suppress the helical modulation of the spins in the multiferroic phase and dramatically affect the electric polarization. Furthermore, just below the spontaneous transition from commensurate (paraelectric) to incommensurate (ferroelectric) structures at 213 K, even modest magnetic fields induce a transition into the incommensurate structure and then suppress it at higher field. Thus, remarkable hidden magnetoelectric features are uncovered, establishing CuO as prototype multiferroic with abundance of competitive magnetic interactions.

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Citations

Aug 2, 2018·Nature Communications·Junzhuang CongYoung Sun
Nov 22, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·P TolédanoA S B Sombra
Mar 1, 2019·Nanomaterials·Elinor C SpencerNancy L Ross
Dec 30, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Binoy Krishna DeV G Sathe
May 6, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Arif I InamdarKuang-Lieh Lu
Sep 22, 2020·ACS Omega·Sudipta GoswamiDipten Bhattacharya
Apr 2, 2019·Journal of the American Chemical Society·Yuanpeng ZhangMatthew G Tucker
Jan 18, 2019·ACS Applied Materials & Interfaces·Xiaolei WangJianhua Zhao
Dec 30, 2021·Inorganic Chemistry·Xiyu ChenJun-Ming Liu

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Methods Mentioned

BETA
single-crystal neutron diffraction
neutron diffraction
neutron back scattering

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