Temperature-dependent Gilbert damping of Co2FeAl thin films with different degree of atomic order

Abstract

Half-metallicity and low magnetic damping are perpetually sought for in spintronics materials and full Heusler alloys in this respect provide outstanding properties. However, it is challenging to obtain the well-ordered half-metallic phase in as-deposited full Heusler alloys thin films and theory has struggled to establish a fundamentals understanding of the temperature dependent Gilbert damping in these systems. Here we present a study of the temperature dependent Gilbert damping of differently ordered as-deposited Co2FeAl full Heusler alloy thin films. The sum of inter- and intraband electron scattering in conjunction with the finite electron lifetime in Bloch states govern the Gilbert damping for the well-ordered phase in contrast to the damping of partially-ordered and disordered phases which is governed by interband electronic scattering alone. These results, especially the ultralow room temperature intrinsic damping observed for the well-ordered phase provide new fundamental insights to the physical origin of the Gilbert damping in full Heusler alloy thin films.

arXiv comment14 Pages, 1 Table, 8 Figures, American Physical Society Journal

References in corpus (18)

• Slater-Pauling Behavior of the Half-Ferromagnetic Full-Heusler Alloys
• Identification of the dominant precession damping mechanism in Fe, Co, and Ni by first-principles calculations
• A method for atomistic spin dynamics simulations: implementation and examples
• Experimental Investigation of Temperature-Dependent Gilbert Damping in Permalloy Thin Films
• Ab-initio calculation of the Gilbert damping parameter via linear response formalism
• Spin-polarization and electronic properties of half-metallic Heusler alloys calculated from first-principles
• First-principles calculation of the Gilbert damping parameter via the linear response formalism with application to magnetic transition-metals and alloys
• Precise determination of the spectroscopic g-factor using broadband ferromagnetic resonance spectroscopy
• Analysis of L21-ordering in full-Heusler Co2FeSi alloy thin films formed by rapid thermal annealing
• Calculating linear response functions for finite temperatures on the basis of the alloy analogy model
• Radiative damping in wave guide based FMR measured via analysis of perpendicular standing spin waves in sputtered Permalloy films
• Co2 FeAl thin films grown on MgO substrates: Correlation between static, dynamic and structural properties
• Data Storage: Review of Heusler Compounds
• Co2FeAl Heusler thin films grown on Si and MgO substrates: annealing temperature effect
• Wavenumber-dependent Gilbert damping in metallic ferromagnets
• First principles studies of the Gilbert damping and exchange interactions for half-metallic Heuslers alloys
• Magnetic and structural properties of Co2FeAl thin films grown on Si substrate
• Synthetic antiferromagnet with Heusler alloy Co2FeAl ferromagnetic layers

Cited by in corpus (11)

• Atomic disorder and Berry phase driven anomalous Hall effect in Co2FeAl Heusler compound
• The interplay of large two-magnon ferromagnetic resonance linewidths and low Gilbert damping in Heusler thin films
• Spin Pumping in Ion-beam Sputtered Co_{2}FeAl/Mo Bilayers:Interfacial Gilbert Damping
• Spin pumping and spin torque in interfacial tailored Co2FeAl/\b{eta}-Ta layers
• Observation of Skyrmions at Room Temperature in Co2FeAl Heusler Alloy Ultrathin Films
• Search for alternative magnetic tunnel junctions based on all-Heusler stacks
• Ultrafast magnetization dynamics in half-metallic Co${}_2$FeAl Heusler alloy
• Magnetoelastic Gilbert damping in magnetostrictive Fe${}_{0.7}$Ga${}_{0.3}$ thin films
• Engineering of spin mixing conductance in Ru/FeCo/Ru interfaces: Effect of Re Doping
• Enhanced Gilbert Damping in Re doped FeCo Films: A Combined Experimental and Theoretical Study
• Computational search for ultrasmall and fast skyrmions in the Inverse Heusler family