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Martensite transformation and magnetic properties of Ni50Mn25Ga25- xFe x ferromagnetic microwires for application in microdevices.
- Source :
-
Physica Status Solidi. A: Applications & Materials Science . Apr2015, Vol. 212 Issue 4, p855-861. 7p. - Publication Year :
- 2015
-
Abstract
- Ni50Mn25Ga25- xFe x (1 ≤ x ≤ 6) microwires with a diameter of 30-50 µm were prepared by melt-extraction. The effects of Fe doping on the martensite transformation temperature, Curie point and magnetic properties before and after chemical ordering treatments were investigated. Experimental results show that Ni50Mn25Ga25- xFe x microwires exhibit typical thermoelastic martensite transformation and magnetic transition. Transformation temperatures of the microwires increase with Fe content with a rate of 27.3 K/at%. Thermal hysteresis during martensite transformation is lowered after Fe doping. The Curie point of Ni50Mn25Ga25- xFe x (1 ≤ x ≤ 6) microwires keeps stable at 390 K, which is 25 K higher compared with Ni2MnGa ternary alloy. After chemical ordering heat treatment, the microwires exhibit a typical ferromagnetic transition and a higher saturation magnetization at low field compared to as-extracted microwires. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18626300
- Volume :
- 212
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Physica Status Solidi. A: Applications & Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 102059904
- Full Text :
- https://doi.org/10.1002/pssa.201431776