In-situ Observation and Differential Thermal Analysis of MnBi in High Magnetic Fields

Daiki Miyazaki; Yoshifuru Mitsui; Ken Ichi Abematsu; Kohki Takahashi; Kazuo Watanabe; Satoshi Uda; Keiichi Koyama

doi:10.1016/j.phpro.2015.12.148

In-situ Observation and Differential Thermal Analysis of MnBi in High Magnetic Fields

Daiki Miyazaki, Yoshifuru Mitsui, Ken Ichi Abematsu, Kohki Takahashi, Kazuo Watanabe, Satoshi Uda, Keiichi Koyama

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

For investigating in-field process of melting and solidification visually and quantitatively, in-situ observation system with differential thermal analysis (DTA) utilized in high temperature and in high magnetic field was developed. Decomposition processes of the bulk sample of ferromagnetic MnBi were directly observed with collecting DTA data under high magnetic field of 10 T for the 290-770 K temperature range. When the temperature was over decomposition point (ferromagnetic MnBi → paramagnetic Mn_1.08Bi + liquid), liquid phase appeared on the sample surface. Furthermore, when the temperature was over peritectic temperature (∼ 700 K: paramagnetic Mn_1.08Bi → Mn + liquid), the sample surface was broken and a large quantity of the liquid phase appeared from the sample. The in-situ observation also suggested that the decomposition temperature increased from 620 K for a zero field to 638 K for a magnetic field of 10 T.

Original language	English
Pages (from-to)	1324-1331
Number of pages	8
Journal	Physics Procedia
Volume	75
DOIs	https://doi.org/10.1016/j.phpro.2015.12.148
Publication status	Published - 2015
Event	20th International Conference on Magnetism, ICM 2015 - Barcelona, Spain Duration: 2015 Jul 5 → 2015 Jul 10

Keywords

MnBi
differential thermal analysis
high magnetic field
in-situ observation

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10.1016/j.phpro.2015.12.148

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title = "In-situ Observation and Differential Thermal Analysis of MnBi in High Magnetic Fields",

abstract = "For investigating in-field process of melting and solidification visually and quantitatively, in-situ observation system with differential thermal analysis (DTA) utilized in high temperature and in high magnetic field was developed. Decomposition processes of the bulk sample of ferromagnetic MnBi were directly observed with collecting DTA data under high magnetic field of 10 T for the 290-770 K temperature range. When the temperature was over decomposition point (ferromagnetic MnBi → paramagnetic Mn1.08Bi + liquid), liquid phase appeared on the sample surface. Furthermore, when the temperature was over peritectic temperature (∼ 700 K: paramagnetic Mn1.08Bi → Mn + liquid), the sample surface was broken and a large quantity of the liquid phase appeared from the sample. The in-situ observation also suggested that the decomposition temperature increased from 620 K for a zero field to 638 K for a magnetic field of 10 T.",

keywords = "MnBi, differential thermal analysis, high magnetic field, in-situ observation",

author = "Daiki Miyazaki and Yoshifuru Mitsui and Abematsu, {Ken Ichi} and Kohki Takahashi and Kazuo Watanabe and Satoshi Uda and Keiichi Koyama",

note = "Funding Information: The experiments in high magnetic fields were carried out at High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University. This work was performed under the Inter-University Cooperative Re search Program of the Institute for Materials Research, Tohoku University (Proposal No. 13K0050 and 14K0053). This work was supported in part by KAKENHI grant no. 25630268. Publisher Copyright: {\textcopyright} 2015 The Authors. Published by Elsevier B.V.; 20th International Conference on Magnetism, ICM 2015 ; Conference date: 05-07-2015 Through 10-07-2015",

year = "2015",

doi = "10.1016/j.phpro.2015.12.148",

language = "English",

volume = "75",

pages = "1324--1331",

journal = "Physics Procedia",

issn = "1875-3884",

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TY - JOUR

T1 - In-situ Observation and Differential Thermal Analysis of MnBi in High Magnetic Fields

AU - Miyazaki, Daiki

AU - Mitsui, Yoshifuru

AU - Abematsu, Ken Ichi

AU - Takahashi, Kohki

AU - Watanabe, Kazuo

AU - Uda, Satoshi

AU - Koyama, Keiichi

N1 - Funding Information: The experiments in high magnetic fields were carried out at High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University. This work was performed under the Inter-University Cooperative Re search Program of the Institute for Materials Research, Tohoku University (Proposal No. 13K0050 and 14K0053). This work was supported in part by KAKENHI grant no. 25630268. Publisher Copyright: © 2015 The Authors. Published by Elsevier B.V.

PY - 2015

Y1 - 2015

N2 - For investigating in-field process of melting and solidification visually and quantitatively, in-situ observation system with differential thermal analysis (DTA) utilized in high temperature and in high magnetic field was developed. Decomposition processes of the bulk sample of ferromagnetic MnBi were directly observed with collecting DTA data under high magnetic field of 10 T for the 290-770 K temperature range. When the temperature was over decomposition point (ferromagnetic MnBi → paramagnetic Mn1.08Bi + liquid), liquid phase appeared on the sample surface. Furthermore, when the temperature was over peritectic temperature (∼ 700 K: paramagnetic Mn1.08Bi → Mn + liquid), the sample surface was broken and a large quantity of the liquid phase appeared from the sample. The in-situ observation also suggested that the decomposition temperature increased from 620 K for a zero field to 638 K for a magnetic field of 10 T.

AB - For investigating in-field process of melting and solidification visually and quantitatively, in-situ observation system with differential thermal analysis (DTA) utilized in high temperature and in high magnetic field was developed. Decomposition processes of the bulk sample of ferromagnetic MnBi were directly observed with collecting DTA data under high magnetic field of 10 T for the 290-770 K temperature range. When the temperature was over decomposition point (ferromagnetic MnBi → paramagnetic Mn1.08Bi + liquid), liquid phase appeared on the sample surface. Furthermore, when the temperature was over peritectic temperature (∼ 700 K: paramagnetic Mn1.08Bi → Mn + liquid), the sample surface was broken and a large quantity of the liquid phase appeared from the sample. The in-situ observation also suggested that the decomposition temperature increased from 620 K for a zero field to 638 K for a magnetic field of 10 T.

KW - MnBi

KW - differential thermal analysis

KW - high magnetic field

KW - in-situ observation

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U2 - 10.1016/j.phpro.2015.12.148

DO - 10.1016/j.phpro.2015.12.148

M3 - Conference article

AN - SCOPUS:84974667213

SN - 1875-3884

VL - 75

SP - 1324

EP - 1331

JO - Physics Procedia

JF - Physics Procedia

T2 - 20th International Conference on Magnetism, ICM 2015

Y2 - 5 July 2015 through 10 July 2015

ER -

In-situ Observation and Differential Thermal Analysis of MnBi in High Magnetic Fields

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