Journal
IEEE TRANSACTIONS ON MAGNETICS
Volume 40, Issue 4, Pages 2775-2777Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2004.829207
Keywords
Huesler alloy; Ni-Mn-Ga; Ni-Mn-In; Ni-Mn-Al
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Ni2MnGa, Ni2MnAl, and Ni2MnIn alloy films were fabricated by using a flash-evaporation technique. A wide substrate temperature range (from 150 K to 720 K) was chosen to prepare the alloy films with significantly different atomic ordering. Various physical properties, including optical properties, were investigated. It was found that the optical properties of the bulk alloys are very sensitive to the atomic ordering. Unexpectedly, the disordered alloy films are not ferromagnetically ordered. The Ni2MnAl bulk alloy exhibits a nonmagnetic behavior. Annealing of the disordered films restores the ordered structure with an almost full recovery of the magnetic and transport properties of the ordered films. These results were further discussed in connection with the atomic structures of the alloy films.
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