Manipulation of the Martensitic Transformation and Exchange Bias Effect in the Ni45Co5Mn37In13 Ferromagnetic Shape Memory Alloy Films

The martensitic phase transition and exchange bias effect of the Ni-Mn-based ferromagnetic shape memory alloys (FSMAs) Ni45Co5Mn37In13 (Ni-Co-Mn-In) films are investigated in this paper. transformation properties Ni-Co-Mn-In alloy target material manipulated by process electric arc melting, melt-fast quenching, high-temperature thermal pressure. with martensite characteristics obtained adjusting deposition parameters on (001) MgO substrate, which shows a significant (EB) at different temperatures. With increasing sputtering power time, film thickness increases, resulting gradual relaxation constraints interface between substrate (the interfacial strain decreases as increase thin thickness), promotes transition. Between zero-field cooling (ZFC) field-cooled (FC) curve obvious division zone, decrease field (HEB) coercive force (Hc) an test temperature is due to (FM) interaction begins dominate, reduction antiferromagnetic (AFM) anisotropy interface. maximal HEB Hc reach ~465.7 Oe ~306.9 5 K, respectively. manipulation EB demonstrates potential application information spintronics.