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 |
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Pages (from-to) | e459-e461 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 300 |
Issue number | 1 |
DOIs | |
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