Magnetoelectric feedback among magnetic order, polarization, and lattice in multiferroic BiFeO3

Junghwan Park; Sang Hyun Lee; Seongsu Lee; Fabia Gozzo; Hiroyuki Kimura; Yukio Noda; Young Jai Choi; Valery Kiryukhin; Sang Wook Cheong; Younjung Jo; Eun Sang Choi; Luis Balicas; Gun Sang Jeon; Je Geun Park

doi:10.1143/JPSJ.80.114714

Magnetoelectric feedback among magnetic order, polarization, and lattice in multiferroic BiFeO₃

Junghwan Park, Sang Hyun Lee, Seongsu Lee, Fabia Gozzo, Hiroyuki Kimura, Yukio Noda, Young Jai Choi, Valery Kiryukhin, Sang Wook Cheong, Younjung Jo, Eun Sang Choi, Luis Balicas, Gun Sang Jeon, Je Geun Park

Department of Physics

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

43 Scopus citations

Abstract

By extensive studies of both neutron and synchrotron X-ray diffraction, we discover that the structure deviates from well-known Debye-Gruneissen predictions below TN in multiferroic BiFeO₃. At the same time, it exhibits a magnetoelastic effect of ∼0:4%, when it undergoes a spiral magnetic order with an extremely long incommensurate period of 630 Å. We show that this additional electric polarization is proportional to the intensity of magnetic Bragg peaks. When subjected to high magnetic fields, our experiments and Monte-Carlo simulation results indicate that magnetic field of ∼20 T unwinds the spiral magnetic structure and quenches the magnetoelastic effect. This is then accompanied by the reduction of electric polarization of 40 nC/cm². The experimental and theoretical results combined together suggest that antisymmetric Dzyaloshinskii-Moriya interaction play a key role in these phenomena. Our results demonstrate an intriguing positive feedback effect among magnetic order, polarization, and the lattice in BiFeO₃.

Original language	English
Article number	114714
Journal	Journal of the Physical Society of Japan
Volume	80
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.80.114714
State	Published - Nov 2011

Keywords

BiFeO
Diffraction studies
High field experiments
Metamagnetic transition
Multiferroic

Access to Document

10.1143/JPSJ.80.114714

Cite this

Park, J., Lee, S. H., Lee, S., Gozzo, F., Kimura, H., Noda, Y., Choi, Y. J., Kiryukhin, V., Cheong, S. W., Jo, Y., Choi, E. S., Balicas, L., Jeon, G. S., & Park, J. G. (2011). Magnetoelectric feedback among magnetic order, polarization, and lattice in multiferroic BiFeO₃. Journal of the Physical Society of Japan, 80(11), Article 114714. https://doi.org/10.1143/JPSJ.80.114714

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abstract = "By extensive studies of both neutron and synchrotron X-ray diffraction, we discover that the structure deviates from well-known Debye-Gruneissen predictions below TN in multiferroic BiFeO3. At the same time, it exhibits a magnetoelastic effect of ∼0:4%, when it undergoes a spiral magnetic order with an extremely long incommensurate period of 630 {\AA}. We show that this additional electric polarization is proportional to the intensity of magnetic Bragg peaks. When subjected to high magnetic fields, our experiments and Monte-Carlo simulation results indicate that magnetic field of ∼20 T unwinds the spiral magnetic structure and quenches the magnetoelastic effect. This is then accompanied by the reduction of electric polarization of 40 nC/cm2. The experimental and theoretical results combined together suggest that antisymmetric Dzyaloshinskii-Moriya interaction play a key role in these phenomena. Our results demonstrate an intriguing positive feedback effect among magnetic order, polarization, and the lattice in BiFeO3.",

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author = "Junghwan Park and Lee, {Sang Hyun} and Seongsu Lee and Fabia Gozzo and Hiroyuki Kimura and Yukio Noda and Choi, {Young Jai} and Valery Kiryukhin and Cheong, {Sang Wook} and Younjung Jo and Choi, {Eun Sang} and Luis Balicas and Jeon, {Gun Sang} and Park, {Je Geun}",

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doi = "10.1143/JPSJ.80.114714",

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AU - Park, Junghwan

AU - Lee, Sang Hyun

AU - Lee, Seongsu

AU - Gozzo, Fabia

AU - Kimura, Hiroyuki

AU - Noda, Yukio

AU - Choi, Young Jai

AU - Kiryukhin, Valery

AU - Cheong, Sang Wook

AU - Jo, Younjung

AU - Choi, Eun Sang

AU - Balicas, Luis

AU - Jeon, Gun Sang

AU - Park, Je Geun

PY - 2011/11

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N2 - By extensive studies of both neutron and synchrotron X-ray diffraction, we discover that the structure deviates from well-known Debye-Gruneissen predictions below TN in multiferroic BiFeO3. At the same time, it exhibits a magnetoelastic effect of ∼0:4%, when it undergoes a spiral magnetic order with an extremely long incommensurate period of 630 Å. We show that this additional electric polarization is proportional to the intensity of magnetic Bragg peaks. When subjected to high magnetic fields, our experiments and Monte-Carlo simulation results indicate that magnetic field of ∼20 T unwinds the spiral magnetic structure and quenches the magnetoelastic effect. This is then accompanied by the reduction of electric polarization of 40 nC/cm2. The experimental and theoretical results combined together suggest that antisymmetric Dzyaloshinskii-Moriya interaction play a key role in these phenomena. Our results demonstrate an intriguing positive feedback effect among magnetic order, polarization, and the lattice in BiFeO3.

AB - By extensive studies of both neutron and synchrotron X-ray diffraction, we discover that the structure deviates from well-known Debye-Gruneissen predictions below TN in multiferroic BiFeO3. At the same time, it exhibits a magnetoelastic effect of ∼0:4%, when it undergoes a spiral magnetic order with an extremely long incommensurate period of 630 Å. We show that this additional electric polarization is proportional to the intensity of magnetic Bragg peaks. When subjected to high magnetic fields, our experiments and Monte-Carlo simulation results indicate that magnetic field of ∼20 T unwinds the spiral magnetic structure and quenches the magnetoelastic effect. This is then accompanied by the reduction of electric polarization of 40 nC/cm2. The experimental and theoretical results combined together suggest that antisymmetric Dzyaloshinskii-Moriya interaction play a key role in these phenomena. Our results demonstrate an intriguing positive feedback effect among magnetic order, polarization, and the lattice in BiFeO3.

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