Field induced lattice deformation in a quasi-one-dimensional antiferromagnet BaCo2V2O8

Shojiro Kimura; Yasuo Narumi; Noriki Terada; Yoshikazu Tanaka; Masahiro Iwaki; Koichi Katsumata; Masayuki Hagiwara; Koichi Kindo; Zhangzhen He; Tomoyasu Taniyama; Mitsuru Itoh; Hidenori Toyokawa; Tetsuya Ishikawa; Hideo Kitamura

doi:10.1143/JPSJ.79.043706

Field induced lattice deformation in a quasi-one-dimensional antiferromagnet BaCo₂V₂O₈

Shojiro Kimura, Yasuo Narumi, Noriki Terada, Yoshikazu Tanaka, Masahiro Iwaki, Koichi Katsumata, Masayuki Hagiwara, Koichi Kindo, Zhangzhen He, Tomoyasu Taniyama, Mitsuru Itoh, Hidenori Toyokawa, Tetsuya Ishikawa, Hideo Kitamura

Materials Property Division

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

5 Citations (Scopus)

Abstract

Synchrotron X-ray diffraction is used to study the correlation between crystal structure and magnetism in a quasi-one-dimensional uniaxial antiferromagnet BaCo₂V₂O₈. When an external magnetic field, B, is applied parallel to the c-axis in the short-range-ordered phase, the lattice constant, a elongates, while c shrinks with increasing B. We calculate the exchange energy under applied magnetic fields based on the proposed magnetic structure. We are successful in explaining the contrasting behavior of the lattice deformations. Our calculation shows that the change in the lattice constants is proportional to M², where M is the magnetization. A good agreement between theory and experiment is obtained for the a-axis up to the saturation field, B_s. Above B_s, an M⁴ term is necessary, in addition to the M² one, to obtain a better agreement. For the c-axis, a sum of the M² and M ⁴ terms gives a reasonable fit to the experimental data.

Original language	English
Article number	043706
Journal	journal of the physical society of japan
Volume	79
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.79.043706
Publication status	Published - 2010 Apr

Keywords

BaCoVOCQuasi-one-dimensional antiferromagnet
Exchange interaction
High magnetic field
Magneto-elastic coupling
Synchrotron X-ray diffraction

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.79.043706

Cite this

Field induced lattice deformation in a quasi-one-dimensional antiferromagnet BaCo₂V₂O₈. / Kimura, Shojiro; Narumi, Yasuo; Terada, Noriki; Tanaka, Yoshikazu; Iwaki, Masahiro; Katsumata, Koichi; Hagiwara, Masayuki; Kindo, Koichi; He, Zhangzhen; Taniyama, Tomoyasu; Itoh, Mitsuru; Toyokawa, Hidenori; Ishikawa, Tetsuya; Kitamura, Hideo.

In: journal of the physical society of japan, Vol. 79, No. 4, 043706, 04.2010.

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

Kimura, Shojiro ; Narumi, Yasuo ; Terada, Noriki ; Tanaka, Yoshikazu ; Iwaki, Masahiro ; Katsumata, Koichi ; Hagiwara, Masayuki ; Kindo, Koichi ; He, Zhangzhen ; Taniyama, Tomoyasu ; Itoh, Mitsuru ; Toyokawa, Hidenori ; Ishikawa, Tetsuya ; Kitamura, Hideo. / Field induced lattice deformation in a quasi-one-dimensional antiferromagnet BaCo₂V₂O₈. In: journal of the physical society of japan. 2010 ; Vol. 79, No. 4.

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abstract = "Synchrotron X-ray diffraction is used to study the correlation between crystal structure and magnetism in a quasi-one-dimensional uniaxial antiferromagnet BaCo2V2O8. When an external magnetic field, B, is applied parallel to the c-axis in the short-range-ordered phase, the lattice constant, a elongates, while c shrinks with increasing B. We calculate the exchange energy under applied magnetic fields based on the proposed magnetic structure. We are successful in explaining the contrasting behavior of the lattice deformations. Our calculation shows that the change in the lattice constants is proportional to M2, where M is the magnetization. A good agreement between theory and experiment is obtained for the a-axis up to the saturation field, Bs. Above Bs, an M4 term is necessary, in addition to the M2 one, to obtain a better agreement. For the c-axis, a sum of the M2 and M 4 terms gives a reasonable fit to the experimental data.",

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AU - Kitamura, Hideo

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N2 - Synchrotron X-ray diffraction is used to study the correlation between crystal structure and magnetism in a quasi-one-dimensional uniaxial antiferromagnet BaCo2V2O8. When an external magnetic field, B, is applied parallel to the c-axis in the short-range-ordered phase, the lattice constant, a elongates, while c shrinks with increasing B. We calculate the exchange energy under applied magnetic fields based on the proposed magnetic structure. We are successful in explaining the contrasting behavior of the lattice deformations. Our calculation shows that the change in the lattice constants is proportional to M2, where M is the magnetization. A good agreement between theory and experiment is obtained for the a-axis up to the saturation field, Bs. Above Bs, an M4 term is necessary, in addition to the M2 one, to obtain a better agreement. For the c-axis, a sum of the M2 and M 4 terms gives a reasonable fit to the experimental data.

AB - Synchrotron X-ray diffraction is used to study the correlation between crystal structure and magnetism in a quasi-one-dimensional uniaxial antiferromagnet BaCo2V2O8. When an external magnetic field, B, is applied parallel to the c-axis in the short-range-ordered phase, the lattice constant, a elongates, while c shrinks with increasing B. We calculate the exchange energy under applied magnetic fields based on the proposed magnetic structure. We are successful in explaining the contrasting behavior of the lattice deformations. Our calculation shows that the change in the lattice constants is proportional to M2, where M is the magnetization. A good agreement between theory and experiment is obtained for the a-axis up to the saturation field, Bs. Above Bs, an M4 term is necessary, in addition to the M2 one, to obtain a better agreement. For the c-axis, a sum of the M2 and M 4 terms gives a reasonable fit to the experimental data.

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