期刊
APPLIED PHYSICS LETTERS
卷 80, 期 10, 页码 1746-1748出版社
AMER INST PHYSICS
DOI: 10.1063/1.1458075
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Giant magnetic-field-induced strain of about 9.5% was observed at ambient temperature in a magnetic field of less than 1 T in NiMnGa orthorhombic seven-layered martensitic phase. The strain proved to be caused by magnetic-field-controlled twin boundary motion. According to an analysis of x-ray diffraction data, the crystal structure of this phase is nearly orthorhombic, having lattice parameters a=0.619 nm, b=0.580 nm, and c=0.553 nm (in cubic parent phase coordinates) at ambient temperature. Seven-layer shuffling-type modulation along the (110)[1 (1) over bar0](p) system was recorded. The results of mechanical tests and magnetic anisotropy property measurements are also reported. (C) 2002 American Institute of Physics.
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