X-ray powder diffraction studies of Mn3Ga0.97Al 0.03C in magnetic fields

Keiichi Koyama; Takeshi Kanomata; Tatsuo Watanabe; Takanobu Suzuki; Hironori Nishihara; Kazuo Watanabe

doi:10.2320/matertrans.47.492

X-ray powder diffraction studies of Mn₃Ga_0.97Al _0.03C in magnetic fields

Keiichi Koyama, Takeshi Kanomata, Tatsuo Watanabe, Takanobu Suzuki, Hironori Nishihara, Kazuo Watanabe

High Field Laboratory for Superconducting Materials

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

3 Citations (Scopus)

Abstract

We have performed the X-ray powder diffraction measurements for Mn ₃Ga_0.97Al_0.03C with a perovskite-type structure in the temperature range from 8 to 320 K in magnetic fields up to 5T, in order to investigate the structural properties affected by the magnetic field. The compound has a successive magnetic phase transition below 160 K: the ferromagnetic (F)-intermediate (I)-antiferromagnetic (AF) phases for cooling process. The lattice parameter a abruptly increases by 0.23%, accompanied by the transition from the I to AF phases at T_AF-1 = 130 K. In addition, we clearly observed that magnetic field induces the I phase with small a and suppresses the AF phase with large a below T_AF-1.

Original language	English
Pages (from-to)	492-495
Number of pages	4
Journal	Materials Transactions
Volume	47
Issue number	3
DOIs	https://doi.org/10.2320/matertrans.47.492
Publication status	Published - 2006 Mar

Keywords

Field-induced structural transformation
High field x-ray diffraction
Magnetic phase transition
MnGaC

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.2320/matertrans.47.492

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abstract = "We have performed the X-ray powder diffraction measurements for Mn 3Ga0.97Al0.03C with a perovskite-type structure in the temperature range from 8 to 320 K in magnetic fields up to 5T, in order to investigate the structural properties affected by the magnetic field. The compound has a successive magnetic phase transition below 160 K: the ferromagnetic (F)-intermediate (I)-antiferromagnetic (AF) phases for cooling process. The lattice parameter a abruptly increases by 0.23%, accompanied by the transition from the I to AF phases at TAF-1 = 130 K. In addition, we clearly observed that magnetic field induces the I phase with small a and suppresses the AF phase with large a below TAF-1.",

keywords = "Field-induced structural transformation, High field x-ray diffraction, Magnetic phase transition, MnGaC",

author = "Keiichi Koyama and Takeshi Kanomata and Tatsuo Watanabe and Takanobu Suzuki and Hironori Nishihara and Kazuo Watanabe",

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AU - Koyama, Keiichi

AU - Kanomata, Takeshi

AU - Watanabe, Tatsuo

AU - Suzuki, Takanobu

AU - Nishihara, Hironori

AU - Watanabe, Kazuo

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AB - We have performed the X-ray powder diffraction measurements for Mn 3Ga0.97Al0.03C with a perovskite-type structure in the temperature range from 8 to 320 K in magnetic fields up to 5T, in order to investigate the structural properties affected by the magnetic field. The compound has a successive magnetic phase transition below 160 K: the ferromagnetic (F)-intermediate (I)-antiferromagnetic (AF) phases for cooling process. The lattice parameter a abruptly increases by 0.23%, accompanied by the transition from the I to AF phases at TAF-1 = 130 K. In addition, we clearly observed that magnetic field induces the I phase with small a and suppresses the AF phase with large a below TAF-1.

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KW - Magnetic phase transition

KW - MnGaC

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