Evolution of ferromagnetic and spin-wave resonances with crystalline order in thin films of full-Heusler alloy Co2MnSi

Abstract

We report the evolution of magnetic moment as well as magnetic anisotropy with crystalline order in Co${}_2$MnSi thin films grown on $(100)$ MgO by pulsed laser deposition. The films become more ordered as the annealing temperature ($T_A$) increases from 400 to 600 ${}^0$C. The extent of \emph{L}$2_1$ ordering in the films annealed at 600 ${}^0$C is $\approx 96$. The static magnetization measurements by vibrating sample magnetometry shows a maximum moment of 4.95 ${\mu }_B$ per formula unit with low coercivity ($H_C$ $\approx$ 65 Oe) in the films annealed at 600 ${}^0$C. A rigorous analysis of the azimuthal and polar angle dependent ferromagnetic resonance (FMR) measured at several temperatures allows determination of various anisotropy fields relevant to our system as a function of $T_A$. Finally, we have evaluated the exchange stiffness constant down to 100 K using spin wave modes in FMR spectra. We have also estimated the exchange energies as well as stiffness constant by varying the lattice parameter \emph{ab-initio} using the Korringa-Kohn-Rostoker method.

7 pages, 7 figures

References in corpus (3)

• Epitaxial film growth and magnetic properties of Co_2FeSi
• Determination of exchange constants of Heusler compounds by Brillouin light scattering spectroscopy: application to Co${}_2$MnSi
• Spin wave resonances in La_{0.7}Sr_{0.3}MnO_{3} films: measurement of spin wave stiffness and anisotropy field

Cited by in corpus (9)

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• Investigation of the temperature-dependence of ferromagnetic resonance and spin waves in Co2FeAl0.5Si0.5
• Two-dimensional electron-gas-like charge transport at magnetic Heusler alloy-SrTiO${}_3$ interface
• Search for alternative magnetic tunnel junctions based on all-Heusler stacks
• Giant coercivity enhancement and dimensional crossover of superconductivity in Co2FeSi-NbN nanoscale bilayers
• Formation of double ring patterns on Co2MnSi Heusler alloy thin film by anodic oxidation under scanning probe microscope
• Electronic structure and thermoelectric properties of CoTiSi half-Heusler alloy: Doping overtones