Abstract
The microstructure evolution of the magnetic-field-induced transition in Ni44.4Mn44.8Sn10.8 alloy was directly observed using in situ optical microscope under pulsed high magnetic field. The microscopic observations indicate that the growth of austenite during magnetic field application might be through the movement of the interface between martensite and austenite phases. This kind of induced austenite state is stable and remained even removing the magnetic field. Based on the experimental results, the change of the brightness contrast might be used to further investigate this irreversibility of the magnetostructural transition and determine the critical transition magnetic fields.
Published Version
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