Magnetic phase diagrams of the multicritical olivine Mn2 SiS4 and Mn2 GeS4

J. H. Chung; K. Ohgushi; Y. Ueda

doi:10.1016/j.jmmm.2009.11.013

Magnetic phase diagrams of the multicritical olivine Mn₂ SiS₄ and Mn₂ GeS₄

J. H. Chung, K. Ohgushi, Y. Ueda

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

6 Citations (Scopus)

Abstract

Using single crystal neutron diffraction, we studied the H (∥ b) - T phase diagram of the antiferromagnetic olivine Mn₂ AS₄ (A = Si, Ge). We identified the two spin-flop phases at high fields that are separated by field-independent phase boundaries terminated at multicritical points. In the low temperature phase, the magnetic structures consist of antiferromagnetic C_z - C_z^′ and ferromagnetic F_x^′ components. In the high temperature phase, in contrast, they are replaced by C_x - C_x^′ and F_z^′. The absence of the anomalies in the DC magnetization data across the spin-reorientation transitions is discussed in terms of the Clausius-Clapeyron relation.

Original language	English
Pages (from-to)	832-837
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	322
Issue number	7
DOIs	https://doi.org/10.1016/j.jmmm.2009.11.013
Publication status	Published - 2010 Apr

Bibliographical note

Funding Information:
We are grateful for helpful discussion with T. Sakakibara. We also acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing the neutron research facilities used in this work. This work is supported by the Korean Government (MEST) through the Grant no. 20090062204 and the BAERI program.

Keywords

Magnetic phase diagram
Multicriticality
Neutron scattering

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2009.11.013

Cite this

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title = "Magnetic phase diagrams of the multicritical olivine Mn2 SiS4 and Mn2 GeS4",

abstract = "Using single crystal neutron diffraction, we studied the H (∥ b) - T phase diagram of the antiferromagnetic olivine Mn2 AS4 (A = Si, Ge). We identified the two spin-flop phases at high fields that are separated by field-independent phase boundaries terminated at multicritical points. In the low temperature phase, the magnetic structures consist of antiferromagnetic Cz - Cz′ and ferromagnetic Fx′ components. In the high temperature phase, in contrast, they are replaced by Cx - Cx′ and Fz′. The absence of the anomalies in the DC magnetization data across the spin-reorientation transitions is discussed in terms of the Clausius-Clapeyron relation.",

keywords = "Magnetic phase diagram, Multicriticality, Neutron scattering",

author = "Chung, {J. H.} and K. Ohgushi and Y. Ueda",

note = "Funding Information: We are grateful for helpful discussion with T. Sakakibara. We also acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing the neutron research facilities used in this work. This work is supported by the Korean Government (MEST) through the Grant no. 20090062204 and the BAERI program. ",

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AU - Chung, J. H.

AU - Ohgushi, K.

AU - Ueda, Y.

N1 - Funding Information: We are grateful for helpful discussion with T. Sakakibara. We also acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing the neutron research facilities used in this work. This work is supported by the Korean Government (MEST) through the Grant no. 20090062204 and the BAERI program.

PY - 2010/4

Y1 - 2010/4

N2 - Using single crystal neutron diffraction, we studied the H (∥ b) - T phase diagram of the antiferromagnetic olivine Mn2 AS4 (A = Si, Ge). We identified the two spin-flop phases at high fields that are separated by field-independent phase boundaries terminated at multicritical points. In the low temperature phase, the magnetic structures consist of antiferromagnetic Cz - Cz′ and ferromagnetic Fx′ components. In the high temperature phase, in contrast, they are replaced by Cx - Cx′ and Fz′. The absence of the anomalies in the DC magnetization data across the spin-reorientation transitions is discussed in terms of the Clausius-Clapeyron relation.

AB - Using single crystal neutron diffraction, we studied the H (∥ b) - T phase diagram of the antiferromagnetic olivine Mn2 AS4 (A = Si, Ge). We identified the two spin-flop phases at high fields that are separated by field-independent phase boundaries terminated at multicritical points. In the low temperature phase, the magnetic structures consist of antiferromagnetic Cz - Cz′ and ferromagnetic Fx′ components. In the high temperature phase, in contrast, they are replaced by Cx - Cx′ and Fz′. The absence of the anomalies in the DC magnetization data across the spin-reorientation transitions is discussed in terms of the Clausius-Clapeyron relation.

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KW - Neutron scattering

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