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Behaviour of Internal Stress in Melt-Spun Ni-Mn-Ga Ribbons |
ZHAO Wei-Ren1;LI Jian-Liang2;QI Yan2;WANG Xin-Lin2 |
1Department of Physics, Shantou University, Shantou 515063
2Institute of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081 |
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Cite this article: |
ZHAO Wei-Ren, LI Jian-Liang, QI Yan et al 2003 Chin. Phys. Lett. 20 427-429 |
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Abstract We investigate the martensitic transition of melt-spun Ni-Mn-Ga ribbons, during which an abrupt release of internal stress occurs. The release results in the appearance of two peaks on the curve of field-induced strains versus temperature. During and after the transformation, a large lag of field-induced strains was observed, indicating a competition between the stress energy and Zeemann energy. The lag leads to an unusual relation of the strains to the inducing field.
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Keywords:
81.30.Kf
81.20.Zx
75.20.En
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Published: 01 March 2003
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