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

Center for Fundamental Research on Nuclear Decommissioning (CFReND)

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

29 Citations (Scopus)

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.

Original language	English
Pages (from-to)	e459-e461
Journal	Journal of Magnetism and Magnetic Materials
Volume	300
Issue number	1
DOIs	https://doi.org/10.1016/j.jmmm.2005.10.192
Publication status	Published - 2006 May
Event	Third International Symposium on Magnetism 2005 - Duration: 2005 Jun 26 → 2005 Jun 30

Keywords

Ferromagnetic materials
Magnetostriction
Phase transitions - magnetic
Phase transitions - structural

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2005.10.192

Cite this

@article{279336e468044f29b67a0f1e9a0d5393,

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",

year = "2006",

month = may,

doi = "10.1016/j.jmmm.2005.10.192",

language = "English",

volume = "300",

pages = "e459--e461",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

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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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DO - 10.1016/j.jmmm.2005.10.192

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SP - e459-e461

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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Y2 - 26 June 2005 through 30 June 2005

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