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Anisotropic spin-driven ferroelectricity and magnetoelectric effect in a Y-type hexaferrite

Authors :
M. F. Liu
Deyang Chen
X. S. Gao
Zhipeng Hou
Zhen Fan
Leiyu Li
J.-M. Liu
Peilian Li
Xubing Lu
Minghui Qin
W. Wang
J. B. Xian
Min Zeng
Source :
Applied Physics Letters. 118:142902
Publication Year :
2021
Publisher :
AIP Publishing, 2021.

Abstract

We report a systematic study on the magnetic, dielectric, and magnetoelectric (ME) properties of the Y-type hexaferrite (Ba0.4Sr1.6)Zn2(Fe11.3Al0.7)O22 single crystal. The phase diagrams were established by the observed magnetic anomalies under magnetic field and temperature scans for the in-plane and out-of-plane cases. Intrinsic large anisotropy in the magnetodielectric and converse ME effects was revealed. The spin-driven electric polarizations induced in the ab-plane and out-of-plane were found to be closely related to the transverse conical and alternating longitudinal conical spin structures, respectively. The amplitudes of varied magnetization ΔM are about ∼0.128 μB/f.u and ∼0.0178 μB/f.u. in the E oscillating between ±1 MV/m at 100 K, corresponding to the converse ME effect coefficient of ∼3500 ps/m and ∼480 ps/m for the in-plane and out-of-plane cases, respectively. All these results demonstrate the essential and unique spin-order-induced anisotropic ferroelectricity and ME properties in these Y-type hexaferrites.

Details

ISSN :
10773118 and 00036951
Volume :
118
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........c38afb0e9625a7be8a643baa05bf9b10
Full Text :
https://doi.org/10.1063/5.0045273