Atomic diffusion in Ni-Mn mechanical alloys around Ni3Mn composition proved from magnetic measurements

N. Q. Sun; R. Zach; Y. Matsushima; F. Ono

doi:10.1016/j.jallcom.2008.09.209

Atomic diffusion in Ni-Mn mechanical alloys around Ni₃Mn composition proved from magnetic measurements

N. Q. Sun, R. Zach, Y. Matsushima, F. Ono

School of Science

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

2 Citations (Scopus)

Abstract

The character of thermal diffusion of magnetic atoms has been investigated in Ni-Mn mechanical alloys around Ni₃Mn composition by monitoring magnetic properties during the atomic ordering process. Observed susceptibility versus temperature curve after annealed at the ordering temperature of 693 K for 50 h shows at least four steps. Those multi steps came into two at the final stage of annealing for 1000 h. The step at the highest temperature corresponds to the Curie temperature T_C of Ni₃Mn. The observed variation of T_C with annealed time was explained by solving a diffusion equation, and the range of the concentration fluctuation was determined to be 4 nm.

Original language	English
Pages (from-to)	87-90
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	480
Issue number	1
DOIs	https://doi.org/10.1016/j.jallcom.2008.09.209
Publication status	Published - Jul 1 2009

Keywords

Diffusion
Magnetic measurements
Mechanical alloys
Transition metal alloys and compounds

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2008.09.209

Cite this

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title = "Atomic diffusion in Ni-Mn mechanical alloys around Ni3Mn composition proved from magnetic measurements",

abstract = "The character of thermal diffusion of magnetic atoms has been investigated in Ni-Mn mechanical alloys around Ni3Mn composition by monitoring magnetic properties during the atomic ordering process. Observed susceptibility versus temperature curve after annealed at the ordering temperature of 693 K for 50 h shows at least four steps. Those multi steps came into two at the final stage of annealing for 1000 h. The step at the highest temperature corresponds to the Curie temperature TC of Ni3Mn. The observed variation of TC with annealed time was explained by solving a diffusion equation, and the range of the concentration fluctuation was determined to be 4 nm.",

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T1 - Atomic diffusion in Ni-Mn mechanical alloys around Ni3Mn composition proved from magnetic measurements

AU - Sun, N. Q.

AU - Zach, R.

AU - Matsushima, Y.

AU - Ono, F.

PY - 2009/7/1

Y1 - 2009/7/1

N2 - The character of thermal diffusion of magnetic atoms has been investigated in Ni-Mn mechanical alloys around Ni3Mn composition by monitoring magnetic properties during the atomic ordering process. Observed susceptibility versus temperature curve after annealed at the ordering temperature of 693 K for 50 h shows at least four steps. Those multi steps came into two at the final stage of annealing for 1000 h. The step at the highest temperature corresponds to the Curie temperature TC of Ni3Mn. The observed variation of TC with annealed time was explained by solving a diffusion equation, and the range of the concentration fluctuation was determined to be 4 nm.

AB - The character of thermal diffusion of magnetic atoms has been investigated in Ni-Mn mechanical alloys around Ni3Mn composition by monitoring magnetic properties during the atomic ordering process. Observed susceptibility versus temperature curve after annealed at the ordering temperature of 693 K for 50 h shows at least four steps. Those multi steps came into two at the final stage of annealing for 1000 h. The step at the highest temperature corresponds to the Curie temperature TC of Ni3Mn. The observed variation of TC with annealed time was explained by solving a diffusion equation, and the range of the concentration fluctuation was determined to be 4 nm.

KW - Diffusion

KW - Magnetic measurements

KW - Mechanical alloys

KW - Transition metal alloys and compounds

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