Simultaneous magnetooptic observation and thermomagnetic analysis of phase transitions in shape-memory Ni-Mn-Ga alloys

Oleg M. Korpusov; Rostislav M. Grechishkin; Victor V. Koledov; Victor V. Khovailo; T. Takagi; Vladimir G. Shavrov

doi:10.1016/j.jmmm.2003.12.812

Simultaneous magnetooptic observation and thermomagnetic analysis of phase transitions in shape-memory Ni-Mn-Ga alloys

Oleg M. Korpusov, Rostislav M. Grechishkin, Victor V. Koledov, Victor V. Khovailo, T. Takagi, Vladimir G. Shavrov

Innovative Energy Research Center

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

Direct observations of the austenite and martensite twin and magnetic domain structures are combined with thermomagnetic analysis (low-field AC susceptibility temperature measurements) of phase transitions in ferromagnetic shape memory alloys Ni_2+xMn_1-x Ga. Thermal hysteresis and magnetization jumps are clearly resolved by both techniques. Large Barkhausen-like jumps associated with discontinuous phase boundary and martensite twin motion are observed during the austenite-martensite transformation in contrast to the smooth ferromagnetic-paramagnetic transition near the Curie temperature.

Original language	English
Pages (from-to)	2035-2037
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	III
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.812
Publication status	Published - 2004 May

Keywords

Barkhausen effect
Magnetic domain structure
Shape memory alloy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Korpusov, O. M., Grechishkin, R. M., Koledov, V. V., Khovailo, V. V., Takagi, T., & Shavrov, V. G. (2004). Simultaneous magnetooptic observation and thermomagnetic analysis of phase transitions in shape-memory Ni-Mn-Ga alloys. Journal of Magnetism and Magnetic Materials, 272-276(III), 2035-2037. https://doi.org/10.1016/j.jmmm.2003.12.812

Simultaneous magnetooptic observation and thermomagnetic analysis of phase transitions in shape-memory Ni-Mn-Ga alloys. / Korpusov, Oleg M.; Grechishkin, Rostislav M.; Koledov, Victor V.; Khovailo, Victor V.; Takagi, T.; Shavrov, Vladimir G.

In: Journal of Magnetism and Magnetic Materials, Vol. 272-276, No. III, 05.2004, p. 2035-2037.

Research output: Contribution to journal › Article

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AU - Khovailo, Victor V.

AU - Takagi, T.

AU - Shavrov, Vladimir G.

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