Magnetic properties of epitaxial Fe–Pd films measured at elevated temperatures

Magnetic properties of disordered Fe–Pd films with 28 and $33at.%$ Pd epitaxially grown at room temperature were measured at room and elevated temperatures up to 900 and $600K$⁠, respectively. Thermomagnetic measurements of the film with $28at.%$ Pd having a body-centered-tetragonal structure in the as-deposited state show that, due to their metastability, disordered Fe–Pd phases can decompose at elevated temperatures. For a film with $33at.%$ Pd having a face-centered-tetragonal (fct) structure in the as-deposited state, no indication of decomposition or first order transformation is observed up to $600K$⁠, suggesting that the fct phase required for the magnetic shape memory effect is quite stable in epitaxial films.