Hidden spin-order-induced room-temperature ferroelectricity in a peculiar conical magnetic structure

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

21 Scopus Citations
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Author(s)

  • Shi-Peng Shen
  • Xin-Zhi Liu
  • Yi-Sheng Chai
  • Andrew Studer
  • Kirrily Rule
  • And 7 others
  • Kun Zhai
  • Li-Qin Yan
  • Da-Shan Shang
  • Frank Klose
  • Yun-Tao Liu
  • Dong-Feng Chen
  • Young Sun

Detail(s)

Original languageEnglish
Article number094405
Journal / Publication Physical Review B: covering condensed matter and materials physics
Volume95
Issue number9
Publication statusPublished - 7 Mar 2017

Abstract

A novel mechanism of spin-induced ferroelectricity is unraveled in the alternating longitudinal conical (ALC) magnetic structure. Because the noncollinear ALC structure possesses a c-axis component with collinear ↑-↑-↓-↓ spin order, spin-driven ferroelectricity along the c axis due to the exchange striction mechanism is predicted. Our experiments verify this prediction in the Y-type hexaferrite Ba0.3Sr1.7Co2Fe11AlO22, where ferroelectricity along the c axis is observed up to room temperature. Neutron diffraction data clearly reveal the ALC phase and its evolution with magnetic fields. The c-axis electric polarization can be well modulated by applying either ab-plane or c-axis magnetic fields, even at 305 K. This kind of spin-induced ferroelectricity associated with the ALC magnetic structure provides a new resource of type II multiferroics.

Citation Format(s)

Hidden spin-order-induced room-temperature ferroelectricity in a peculiar conical magnetic structure. / Shen, Shi-Peng; Liu, Xin-Zhi; Chai, Yi-Sheng; Studer, Andrew; Rule, Kirrily; Zhai, Kun; Yan, Li-Qin; Shang, Da-Shan; Klose, Frank; Liu, Yun-Tao; Chen, Dong-Feng; Sun, Young.

In: Physical Review B: covering condensed matter and materials physics, Vol. 95, No. 9, 094405, 07.03.2017.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review