Superhigh strains of 15% for the and 13.5% for the with the nonmodulated martensite structure were achieved by variant reorientation. A strong magnetic anisotropy exists in the prefabricated single variant with the easy axis along the contraction [001] direction of the high-temperature cubic phase. A higher austenitic transformation temperature was found in the single variant comparing with the original multivariant sample. The same order of magnitude for the saturation magnetization magnetic anisotropy constant and the twin reorientation stress namely, and approximately 20 MPa, respectively, as those in 5M martensite indicate that it is reasonable to expect a much higher magnetic field-induced-strain in the nonmodulated NiMnGa alloys.
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7 October 2002
Research Article|
October 07 2002
Superhigh strains by variant reorientation in the nonmodulated ferromagnetic NiMnGa alloys
Chengbao Jiang;
Chengbao Jiang
Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People’s Republic of China
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Ting Liang;
Ting Liang
Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People’s Republic of China
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Huibin Xu;
Huibin Xu
Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People’s Republic of China
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Ming Zhang;
Ming Zhang
State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Science, Beijing 100080, People’s Republic of China
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Guangheng Wu
Guangheng Wu
State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Science, Beijing 100080, People’s Republic of China
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Appl. Phys. Lett. 81, 2818–2820 (2002)
Article history
Received:
June 13 2002
Accepted:
August 19 2002
Citation
Chengbao Jiang, Ting Liang, Huibin Xu, Ming Zhang, Guangheng Wu; Superhigh strains by variant reorientation in the nonmodulated ferromagnetic NiMnGa alloys. Appl. Phys. Lett. 7 October 2002; 81 (15): 2818–2820. https://doi.org/10.1063/1.1512948
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