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Reversal and non-reversal ferroelectric polarization in a Y-type hexaferrite

Abstract

The Cr ion doped Y-type hexaferrite Ba0.5Sr1.5Zn2Fe11.4Cr0.6O22 has been found as a promising magnetoelectric material for the non-zero spontaneous electric polarization that can be reversed by a relatively low magnetic field. However, it remains an open question what the underlying mechanism of magnetoelectric correlation is and how this correlation evolves with the varying temperature and magnetic field. Here we establish a detailed phase diagram via the combined measurements and analyses of magnetization, dielectric constant, and electric polarization. Various magnetic and ferroelectric phases are discovered for different scales of temperature and magnetic field, as well as the complicated and intriguing phase transitions. A newly emerging transition at 183 K separates the low-field ferroelectric phase into two regions with reversal and non-reversal polarization respectively, which is rarely observed among various magnetoelectric ferrites. Possible field-dependent magnetic structures are proposed to qualitatively explain this transition.

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Publication details

The article was received on 17 Oct 2018, accepted on 29 Nov 2018 and first published on 01 Dec 2018


Article type: Paper
DOI: 10.1039/C8TC05247F
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Reversal and non-reversal ferroelectric polarization in a Y-type hexaferrite

    Y. Q. Wang, S. Zhang, W. Zhu, L. Ling, L. Zhang, Z. Qu, P. Li, W. Tong and M. Tian, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC05247F

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