Ahn, JP Cheng, N Lograsso, T Krishnan, KM 2024-01-21T12:08:54Z 2024-01-21T12:08:54Z 2021-09-05 2001-07 0018-9464 https://pubs.kist.re.kr/handle/201004/140360 Ni1-2xMnxGax (x similar to 0.2 and 0.25) alloys in thin film form were prepared by ion-beam sputtering from alloy targets. For Si(001) substrates the structure/texture of the films are a function of the growth temperature (T-g). The tetragonal martensite structure with a (220) texture was obtained for an optimal T-g similar to 300-350 degreesC. At higher temperatures a cubic silicide (Mn12Ni4Si3) was obtained. At room temperature, optimal films with the stoichiometric composition (x similar to 0.2) showed a ferromagnetic hysteresis behavior characterized by significant in-plane rotation. The coercivity of the films was 310 Oe and temperature-dependent measurements confirmed a Curie temperature, T-c similar to 340 K. At room temperature the films show a modulated 7M martensite structure which was observed in in situ heating experiments to transforms to the cubic austenite phase at 500 degreesC. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC MARTENSITIC TRANSFORMATIONS NI2MNGA ALLOYS Magnetic properties, structure and shape-memory transitions in Ni-Mn-Ga thin films grown by ion-beam sputtering Article 10.1109/20.951103 1 IEEE TRANSACTIONS ON MAGNETICS, v.37, no.4, pp.2141 - 2143 IEEE TRANSACTIONS ON MAGNETICS 37 4 2141 2143 scie scopus 000170910900279 2-s2.0-0035386560 Engineering, Electrical & Electronic Physics, Applied Engineering Physics Article; Proceedings Paper MARTENSITIC TRANSFORMATIONS NI2MNGA ALLOYS ion beam sputtering magnetic actuation in MEMS Ni-Mn-Ga shape memory alloy thin films