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Unusual magnetic anisotropy in the ferromagnetic shape-memory alloy Ni50Fe23Ga27.
- Source :
- Applied Physics Letters; 12/19/2011, Vol. 99 Issue 25, p252504, 3p, 5 Graphs
- Publication Year :
- 2011
-
Abstract
- Unusual magnetic anisotropy of the ferromagnetic shape-memory alloy Ni50Fe23Ga27 has been observed. The anisotropy of the austenite becomes very large, even larger than that of the martensite in ribbon samples. Lowering the temperature from 300 K to 80 K, the saturation field of the austenite is dramatically increased from 200 Oe up to 6 kOe. This high-anisotropy behavior clearly highlights the demagnetization effect of the martensitic transformation. The physical mechanism is attributed to a collective effect coming from the atomic disorder, the premartensitic transformation, and the off-stoichiometric Ga-rich composition of the alloys. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 99
- Issue :
- 25
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 70097664
- Full Text :
- https://doi.org/10.1063/1.3671666