The thermal expansion coefficient and volume magnetostriction of Heusler Ni2MnGa alloys

V. D. Buchelnikov; V. V. Khovailo; T. Takagi

doi:10.1016/j.jmmm.2005.10.192

The thermal expansion coefficient and volume magnetostriction of Heusler Ni₂MnGa alloys

V. D. Buchelnikov, V. V. Khovailo, T. Takagi

原子炉廃止措置基盤研究センター

研究成果: Conference article › 査読

29 被引用数 (Scopus)

抄録

In this work the thermal expansion coefficient of Ni₂MnGa alloy was experimentally determined. It was shown that the thermal expansion coefficient has a peak at the point of magnetic phase transition. The value of thermal expansion coefficient jump at Curie point is Δκ=1. 8×10^-5 K^-1. From the phenomenological Ginzburg-Landau theory of a magnetic second-order phase transition the expression for a jump of thermal expansion coefficient in Curie point was obtained. From the comparison of experimental and theoretical jumps of thermal expansion the value of volume magnetostriction for Ni₂MnGa alloy was determined: B₁≈20×10⁹ erg/cm³.

本文言語	English
ページ（範囲）	e459-e461
ジャーナル	Journal of Magnetism and Magnetic Materials
巻	300
号	1
DOI	https://doi.org/10.1016/j.jmmm.2005.10.192
出版ステータス	Published - 2006 5月
イベント	Third International Symposium on Magnetism 2005 - 継続期間: 2005 6月 26 → 2005 6月 30

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

文献へのアクセス

10.1016/j.jmmm.2005.10.192

他のファイルとリンク

引用スタイル

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title = "The thermal expansion coefficient and volume magnetostriction of Heusler Ni2MnGa alloys",

abstract = "In this work the thermal expansion coefficient of Ni2MnGa alloy was experimentally determined. It was shown that the thermal expansion coefficient has a peak at the point of magnetic phase transition. The value of thermal expansion coefficient jump at Curie point is Δκ=1. 8×10-5 K-1. From the phenomenological Ginzburg-Landau theory of a magnetic second-order phase transition the expression for a jump of thermal expansion coefficient in Curie point was obtained. From the comparison of experimental and theoretical jumps of thermal expansion the value of volume magnetostriction for Ni2MnGa alloy was determined: B1≈20×109 erg/cm3.",

keywords = "Ferromagnetic materials, Magnetostriction, Phase transitions - magnetic, Phase transitions - structural",

author = "Buchelnikov, {V. D.} and Khovailo, {V. V.} and T. Takagi",

note = "Funding Information: This work is supported by RFBR (Grants 03-02-17443, 04-02-81058, 03-02-39006).; Third International Symposium on Magnetism 2005 ; Conference date: 26-06-2005 Through 30-06-2005",

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TY - JOUR

T1 - The thermal expansion coefficient and volume magnetostriction of Heusler Ni2MnGa alloys

AU - Buchelnikov, V. D.

AU - Khovailo, V. V.

AU - Takagi, T.

N1 - Funding Information: This work is supported by RFBR (Grants 03-02-17443, 04-02-81058, 03-02-39006).

PY - 2006/5

Y1 - 2006/5

N2 - In this work the thermal expansion coefficient of Ni2MnGa alloy was experimentally determined. It was shown that the thermal expansion coefficient has a peak at the point of magnetic phase transition. The value of thermal expansion coefficient jump at Curie point is Δκ=1. 8×10-5 K-1. From the phenomenological Ginzburg-Landau theory of a magnetic second-order phase transition the expression for a jump of thermal expansion coefficient in Curie point was obtained. From the comparison of experimental and theoretical jumps of thermal expansion the value of volume magnetostriction for Ni2MnGa alloy was determined: B1≈20×109 erg/cm3.

AB - In this work the thermal expansion coefficient of Ni2MnGa alloy was experimentally determined. It was shown that the thermal expansion coefficient has a peak at the point of magnetic phase transition. The value of thermal expansion coefficient jump at Curie point is Δκ=1. 8×10-5 K-1. From the phenomenological Ginzburg-Landau theory of a magnetic second-order phase transition the expression for a jump of thermal expansion coefficient in Curie point was obtained. From the comparison of experimental and theoretical jumps of thermal expansion the value of volume magnetostriction for Ni2MnGa alloy was determined: B1≈20×109 erg/cm3.

KW - Ferromagnetic materials

KW - Magnetostriction

KW - Phase transitions - magnetic

KW - Phase transitions - structural

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