Electrical-and magneto-transport across the thermo-elastic martensitic transformation in anti-site-disordered off-stoichiometric Co–Fe–Ti–Si Heusler alloy thin films

and e-p scattering. All the CFTS films exhibit a distinct thermal hysteresis and a significant drop in resistivity, symptomatic of a MPT, near the characteristic temperatures: martensite-endTMe≅300K and austenite-beginTAb≅325K. Regardless of the strength of ASD, in the martensite phase the anti-symmetric (ASMR) component ofMR⊥(H)dominates over the symmetric (SMR) counterpart, whereas the reverse is true (i.e.SMR≫ASMR) for the austenite phase at temperaturesTAb≅325K⩽T⩽375K, whereMR⊥increases very sharply with temperature as the austenite phase grows rapidly at the expense of the martensite phase. The present results assert that the CFTS Heusler alloy thin films are promising candidates for shape-memory devices and for spintronic applications such as spin valves.