Spontaneous polarization reversal in multiferroic Mn0.85Co0.15WO4 induced by an external magnetic field

Narayan Poudel; Bernd Lorenz; Kao Chen Liang; Ya Qi Wang; Yan Yi Sun; Feng Ye; Jaime A. Fernandez-Baca; Ching Wu Chu

doi:10.1109/TMAG.2014.2320192

Spontaneous polarization reversal in multiferroic Mn_0.85Co_0.15WO₄ induced by an external magnetic field

Narayan Poudel, Bernd Lorenz, Kao Chen Liang, Ya Qi Wang, Yan Yi Sun, Feng Ye, Jaime A. Fernandez-Baca, Ching Wu Chu

Research output: Contribution to journal › Article › peer-review

Abstract

The multiferroic properties of Mn_0.85Co_0.15WO₄ are studied in magnetic fields oriented along the monoclinic c-axis. A spontaneous sign reversal of the ferroelectric polarization is observed upon decreasing temperature if cooled in a constant magnetic field. This unusual phenomenon is explained by the coexistence of different multiferroic phases with conical and spiral spin structures. These phases form domains which contribute to the electrical polarization in different temperature ranges. The sign reversal of the polarization is explained by an analysis of the contributions from the different domains to the net value of the polarization. It is concluded that the spiral and conical magnetic orders in neighboring domains are strongly coupled leading to the preservation of the spin chirality across the domain walls.

Original language	English
Article number	6971680
Journal	IEEE Transactions on Magnetics
Volume	50
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2014.2320192
State	Published - Nov 1 2014

Keywords

Magnetic domains
multiferroics
polarization switching

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10.1109/TMAG.2014.2320192

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title = "Spontaneous polarization reversal in multiferroic Mn0.85Co0.15WO4 induced by an external magnetic field",

abstract = "The multiferroic properties of Mn0.85Co0.15WO4 are studied in magnetic fields oriented along the monoclinic c-axis. A spontaneous sign reversal of the ferroelectric polarization is observed upon decreasing temperature if cooled in a constant magnetic field. This unusual phenomenon is explained by the coexistence of different multiferroic phases with conical and spiral spin structures. These phases form domains which contribute to the electrical polarization in different temperature ranges. The sign reversal of the polarization is explained by an analysis of the contributions from the different domains to the net value of the polarization. It is concluded that the spiral and conical magnetic orders in neighboring domains are strongly coupled leading to the preservation of the spin chirality across the domain walls.",

keywords = "Magnetic domains, multiferroics, polarization switching",

author = "Narayan Poudel and Bernd Lorenz and Liang, {Kao Chen} and Wang, {Ya Qi} and Sun, {Yan Yi} and Feng Ye and Fernandez-Baca, {Jaime A.} and Chu, {Ching Wu}",

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T1 - Spontaneous polarization reversal in multiferroic Mn0.85Co0.15WO4 induced by an external magnetic field

AU - Poudel, Narayan

AU - Lorenz, Bernd

AU - Liang, Kao Chen

AU - Wang, Ya Qi

AU - Sun, Yan Yi

AU - Ye, Feng

AU - Fernandez-Baca, Jaime A.

AU - Chu, Ching Wu

PY - 2014/11/1

Y1 - 2014/11/1

N2 - The multiferroic properties of Mn0.85Co0.15WO4 are studied in magnetic fields oriented along the monoclinic c-axis. A spontaneous sign reversal of the ferroelectric polarization is observed upon decreasing temperature if cooled in a constant magnetic field. This unusual phenomenon is explained by the coexistence of different multiferroic phases with conical and spiral spin structures. These phases form domains which contribute to the electrical polarization in different temperature ranges. The sign reversal of the polarization is explained by an analysis of the contributions from the different domains to the net value of the polarization. It is concluded that the spiral and conical magnetic orders in neighboring domains are strongly coupled leading to the preservation of the spin chirality across the domain walls.

AB - The multiferroic properties of Mn0.85Co0.15WO4 are studied in magnetic fields oriented along the monoclinic c-axis. A spontaneous sign reversal of the ferroelectric polarization is observed upon decreasing temperature if cooled in a constant magnetic field. This unusual phenomenon is explained by the coexistence of different multiferroic phases with conical and spiral spin structures. These phases form domains which contribute to the electrical polarization in different temperature ranges. The sign reversal of the polarization is explained by an analysis of the contributions from the different domains to the net value of the polarization. It is concluded that the spiral and conical magnetic orders in neighboring domains are strongly coupled leading to the preservation of the spin chirality across the domain walls.

KW - Magnetic domains

KW - multiferroics

KW - polarization switching

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DO - 10.1109/TMAG.2014.2320192

M3 - Article

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SN - 0018-9464

VL - 50

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 11

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ER -

Spontaneous polarization reversal in multiferroic Mn_0.85Co_0.15WO₄ induced by an external magnetic field

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