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

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

doi:10.1103/PhysRevB.95.094405

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

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

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

30 Citations (Scopus)

83 Downloads (CityUHK Scholars)

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.

Original language	English
Article number	094405
Journal	Physical Review B: covering condensed matter and materials physics
Volume	95
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.95.094405
Publication status	Published - 7 Mar 2017

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: Shen, S-P., Liu, X-Z., Chai, Y-S., Studer, A., Rule, K., Zhai, K., Yan, L-Q., Shang, D-S., Klose, F., Liu, Y-T., Chen, D-F., & Sun, Y. (2017). Hidden spin-order-induced room-temperature ferroelectricity in a peculiar conical magnetic structure. Physical Review B: covering condensed matter and materials physics, 95(9), [094405]. https://doi.org/10.1103/PhysRevB.95.094405. The copyright of this article is owned by American Physical Society.

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Shen, S.-P., Liu, X.-Z., Chai, Y.-S., Studer, A., Rule, K., Zhai, K., Yan, L.-Q., Shang, D.-S., Klose, F., Liu, Y.-T., Chen, D.-F., & Sun, Y. (2017). Hidden spin-order-induced room-temperature ferroelectricity in a peculiar conical magnetic structure. Physical Review B: covering condensed matter and materials physics, 95(9), Article 094405. https://doi.org/10.1103/PhysRevB.95.094405

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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.",

author = "Shi-Peng Shen and Xin-Zhi Liu and Yi-Sheng Chai and Andrew Studer and Kirrily Rule and Kun Zhai and Li-Qin Yan and Da-Shan Shang and Frank Klose and Yun-Tao Liu and Dong-Feng Chen and Young Sun",

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Hidden spin-order-induced room-temperature ferroelectricity in a peculiar conical magnetic structure. / Shen, Shi-Peng; Liu, Xin-Zhi; Chai, Yi-Sheng et al.
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 - Publication in refereed journal › peer-review

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T1 - Hidden spin-order-induced room-temperature ferroelectricity in a peculiar conical magnetic structure

AU - Shen, Shi-Peng

AU - Liu, Xin-Zhi

AU - Chai, Yi-Sheng

AU - Studer, Andrew

AU - Rule, Kirrily

AU - Zhai, Kun

AU - Yan, Li-Qin

AU - Shang, Da-Shan

AU - Klose, Frank

AU - Liu, Yun-Tao

AU - Chen, Dong-Feng

AU - Sun, Young

PY - 2017/3/7

Y1 - 2017/3/7

N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevB.95.094405

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JO - Physical Review B: covering condensed matter and materials physics

JF - Physical Review B: covering condensed matter and materials physics

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

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