2015/11/05 by B. Samantaray, Samantaray, B., Akhilesh Kr. Singh +5
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties and Applications #Magnetic properties of thin films #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Metallic Glasses and Amorphous Alloys #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1511.01722
openalex publication_date 2015/11/05 · arxiv created 2015/11/06 · arxiv updated 2015/11/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Magnetic anisotropy, spin wave (SW) excitation and exchange stiffness constant of amorphous FeTaC (d = 20-200 nm) films were studied as a function of thickness using micro-strip ferromagnetic resonance (MS-FMR) technique. The MS-FMR spectra for in-plane applied magnetic field show the presence of uniform precessional mode (n = 0) along with first perpendicular standing spin wave (PSSW) mode (n = 1) especially for d = 50, 100 and 200 nm films. The angular (φH) dependence of resonance field (Hr) and magnetic field dependence of resonance frequencies (fr) in planar configuration for the uniform and PSSW modes were modeled successfully by using dispersion relation which arises from a combination of exchange and dipolar interactions. The relevant parameters such as saturation magnetization (4πMS), uniaxial anisotropic constant (Ku), g-factor, and exchange stiffness constants (Aex) are estimated for different FeTaC film thickness. Aex is found to increase from 1.52(4)×10-7 to 5.0(5)×10-6 erg/cm as the thickness of film increases from 50 to 200 nm, possibly due to surface pinning effect or significant inhomogeneity especially at higher thickness films.