Effect of structure on the optical properties of Ni-Mn-Ga alloy: experimental and theoretical investigation

Z. Y. Gao; C. Liu; C. L. Tan; J. H. Sui; W. Cai

doi:10.1117/12.841494

20 October 2009 Effect of structure on the optical properties of Ni-Mn-Ga alloy: experimental and theoretical investigation

Z. Y. Gao, C. Liu, C. L. Tan, J. H. Sui, W. Cai

Author Affiliations +

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 74934B (2009) https://doi.org/10.1117/12.841494
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

Abstract

Ni-Mn-Ga alloys possess thermoelastic martensitic transformation and ferromagnetic transition. Despite the giant magnetic-field-induced strain and stress-induced martensitic transformation developed in Ni-Mn-Ga alloys, however, little information is obtained about optical properties of Ni-Mn-Ga alloys as candidate materials in digital information storage. In this study, the optical reflectivity of Ni-Mn-Ga alloys in martensite and austenite phases has been investigated. The results reveal that the maximum reflectivity difference between the martensite and austenite phases is about 24%, indicating the promising application in phase-transition information storage. The calculated DOS shows that the effect of martensitic transformation on optical properties is attributed to the change of Ni 3d partial DOS between the austenite and martensite phases.

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Z. Y. Gao, C. Liu, C. L. Tan, J. H. Sui, and W. Cai "Effect of structure on the optical properties of Ni-Mn-Ga alloy: experimental and theoretical investigation", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74934B (20 October 2009); https://doi.org/10.1117/12.841494

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