Successive field-induced transitions in BiFeO3 around room temperature

Shiro Kawachi; Atsushi Miyake; Toshimitsu Ito; Sachith E. Dissanayake; Masaaki Matsuda; William Ratcliff; Zhijun Xu; Yang Zhao; Shin Miyahara; Nobuo Furukawa; Masashi Tokunaga

doi:10.1103/PhysRevMaterials.1.024408

Successive field-induced transitions in BiFeO3 around room temperature

Shiro Kawachi, Atsushi Miyake, Toshimitsu Ito, Sachith E. Dissanayake, Masaaki Matsuda, William Ratcliff, Zhijun Xu, Yang Zhao, Shin Miyahara, Nobuo Furukawa, Masashi Tokunaga

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23 Scopus citations

Abstract

The effects of high magnetic fields applied perpendicular to the spontaneous ferroelectric polarization on single crystals of BiFeO3 were investigated through magnetization, magnetostriction, and neutron diffraction measurements. The magnetostriction measurements revealed lattice distortion of 2×10-5 during the reorientation process of the cycloidal spin order by applied magnetic fields. Furthermore, anomalous changes in magnetostriction and electric polarization at a larger field demonstrate an intermediate phase between cycloidal and canted antiferromagnetic states, where a large magnetoelectric effect was observed. Neutron diffraction measurements clarified that incommensurate spin modulation along the [110]hex direction in the cycloidal phase becomes Q=0 commensurate along this direction in the intermediate phase. Theoretical calculations based on the standard spin Hamiltonian of this material suggest an antiferromagnetic cone-type spin order in the intermediate phase.

Original language	English
Article number	024408
Journal	Physical Review Materials
Volume	1
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevMaterials.1.024408
State	Published - Jul 21 2017

Bibliographical note

Publisher Copyright:
© 2017 American Physical Society. us.

Funding

This work was supported by JSPS KAKENHI Grant No. JP16K05413 and the Murata Science Foundation. S.E.D. and M.M. acknowledge the support by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. W.R. acknowledges the support by the U.S. Department of Commerce.

Funders	Funder number
Office of Basic Energy Sciences
Scientific User Facilities Division
U.S. Department of Energy
U.S. Department of Commerce
Japan Society for the Promotion of Science	16K05413

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10.1103/PhysRevMaterials.1.024408

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title = "Successive field-induced transitions in BiFeO3 around room temperature",

abstract = "The effects of high magnetic fields applied perpendicular to the spontaneous ferroelectric polarization on single crystals of BiFeO3 were investigated through magnetization, magnetostriction, and neutron diffraction measurements. The magnetostriction measurements revealed lattice distortion of 2×10-5 during the reorientation process of the cycloidal spin order by applied magnetic fields. Furthermore, anomalous changes in magnetostriction and electric polarization at a larger field demonstrate an intermediate phase between cycloidal and canted antiferromagnetic states, where a large magnetoelectric effect was observed. Neutron diffraction measurements clarified that incommensurate spin modulation along the [110]hex direction in the cycloidal phase becomes Q=0 commensurate along this direction in the intermediate phase. Theoretical calculations based on the standard spin Hamiltonian of this material suggest an antiferromagnetic cone-type spin order in the intermediate phase.",

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AU - Kawachi, Shiro

AU - Miyake, Atsushi

AU - Ito, Toshimitsu

AU - Dissanayake, Sachith E.

AU - Matsuda, Masaaki

AU - Ratcliff, William

AU - Xu, Zhijun

AU - Zhao, Yang

AU - Miyahara, Shin

AU - Furukawa, Nobuo

AU - Tokunaga, Masashi

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N2 - The effects of high magnetic fields applied perpendicular to the spontaneous ferroelectric polarization on single crystals of BiFeO3 were investigated through magnetization, magnetostriction, and neutron diffraction measurements. The magnetostriction measurements revealed lattice distortion of 2×10-5 during the reorientation process of the cycloidal spin order by applied magnetic fields. Furthermore, anomalous changes in magnetostriction and electric polarization at a larger field demonstrate an intermediate phase between cycloidal and canted antiferromagnetic states, where a large magnetoelectric effect was observed. Neutron diffraction measurements clarified that incommensurate spin modulation along the [110]hex direction in the cycloidal phase becomes Q=0 commensurate along this direction in the intermediate phase. Theoretical calculations based on the standard spin Hamiltonian of this material suggest an antiferromagnetic cone-type spin order in the intermediate phase.

AB - The effects of high magnetic fields applied perpendicular to the spontaneous ferroelectric polarization on single crystals of BiFeO3 were investigated through magnetization, magnetostriction, and neutron diffraction measurements. The magnetostriction measurements revealed lattice distortion of 2×10-5 during the reorientation process of the cycloidal spin order by applied magnetic fields. Furthermore, anomalous changes in magnetostriction and electric polarization at a larger field demonstrate an intermediate phase between cycloidal and canted antiferromagnetic states, where a large magnetoelectric effect was observed. Neutron diffraction measurements clarified that incommensurate spin modulation along the [110]hex direction in the cycloidal phase becomes Q=0 commensurate along this direction in the intermediate phase. Theoretical calculations based on the standard spin Hamiltonian of this material suggest an antiferromagnetic cone-type spin order in the intermediate phase.

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Successive field-induced transitions in BiFeO3 around room temperature

Abstract

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