Effect of Ta buffer layer on the structural and magnetic properties of stoichiometric intermetallic FeAl alloy

• DOI: 10.1063/9.0000812
• Publication Date: 2024-02-15T02:05:14Z
• Authors: Sunayana Bhardwaj; Prashant Kumar; Ram Krishna Ghosh; Bijoy K. Kuanr
• Keywords: FEAL; Buffer (optical fiber)

The magnetostructural phase transition in Fe50Al50 alloy with chemically ordered paramagnetic B2 and disordered ferromagnetic (FM) A2 has applications spintronics such as phase-change magnetic memory magnonic devices. We first conducted a systematic first-principles density functional theory study of the phases alloy. A theoretical understanding this equiatomic alloy’s electronic spin-dynamical properties leads us to experimental exploration FM phase. Therefore, we deposit 50 nm thin film using sputtering investigate influence Ta buffer layer on its structural properties. Our results reveal that exhibits appreciably higher saturation magnetization (848 emu/cc) than without (576 emu/cc). However, surface roughness Gilbert damping (α) slightly increase presence from 0.41 0.56 4.35 × 10−3–4.94 10−3, respectively. enhancement α is due extrinsic contributions induced by inhomogeneities.