Giant magnetoelectric effects achieved by tuning spin cone symmetry in Y-type hexaferrites

Nature Communications - Tập 8 Số 1
Kun Zhai1, Yan Wu2, Shipeng Shen1, Wei Tian2, Huibo Cao2, Yisheng Chai1, Bryan C. Chakoumakos2, Dashan Shang1, Liqin Yan1, Fangwei Wang1, Young Sun3
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
3School of Physical Science, University of Chinese Academy of Sciences, Beijing, 100190, China

Tóm tắt

AbstractMultiferroics materials, which exhibit coupled magnetic and ferroelectric properties, have attracted tremendous research interest because of their potential in constructing next-generation multifunctional devices. The application of single-phase multiferroics is currently limited by their usually small magnetoelectric effects. Here, we report the realization of giant magnetoelectric effects in a Y-type hexaferrite Ba0.4Sr1.6Mg2Fe12O22 single crystal, which exhibits record-breaking direct and converse magnetoelectric coefficients and a large electric-field-reversed magnetization. We have uncovered the origin of the giant magnetoelectric effects by a systematic study in the Ba2-x Sr x Mg2Fe12O22 family with magnetization, ferroelectricity and neutron diffraction measurements. With the transverse spin cone symmetry restricted to be two-fold, the one-step sharp magnetization reversal is realized and giant magnetoelectric coefficients are achieved. Our study reveals that tuning magnetic symmetry is an effective route to enhance the magnetoelectric effects also in multiferroic hexaferrites.

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Tập 8 Số 1

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