Determination of exchange constants of Heusler compounds by Brillouin light scattering spectroscopy: application to Co${}_2$MnSi

Abstract

Brillouin light scattering spectroscopy from so-called standing spin waves in thin magnetic films is often used to determine the magnetic exchange constant. The data analysis of the experimentally determined spin-wave modes requires an unambiguous assignment to the correct spin wave mode orders. Often additional investigations are needed to guarantee correct assignment. This is particularly important in the case of Heusler compounds where values of the exchange constant vary substantially between different compounds. As a showcase, we report on the determination of the exchange constant (exchange stiffness constant) in Co${}_2$MnSi, which is found to be $A=2.35\pm 0.1$ $\mu$erg/cm ($D=575\pm 20$ meV Å${}^2$), a value comparable to the value of the exchange constant of Co.

References in corpus (2)

• Ab-initio calculations of exchange interactions, spin-wave stiffness constants, and Curie temperatures of Fe, Co, and Ni
• Intensity of Brillouin light scattering from spin waves in magnetic multilayers with noncollinear spin configurations: Theory and experiment

Cited by in corpus (13)

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• Evolution of ferromagnetic and spin-wave resonances with crystalline order in thin films of full-Heusler alloy Co2MnSi
• Determining the Anisotropic Exchange Coupling of CrO_2 via First-Principles Density Functional Theory Calculations
• First principles studies of the Gilbert damping and exchange interactions for half-metallic Heuslers alloys
• Analytical expression of the magneto-optical Kerr effect and Brillouin light scattering intensity arising from dynamic magnetization
• A systematic study of magnetodynamic properties at finite temperatures in doped permalloy from first principles calculations
• Swift thermal steering of domain walls in ferromagnetic MnBi stripes
• Spin-wave stiffness and micromagnetic exchange interactions expressed by means of the KKR Green function approach
• Structural and magnetic properties of Co2MnSi thin films
• Optical determination of the exchange stiffness constant in an iron garnet
• Breaking Space Inversion-Symmetry to Obtain Asymmetric Spin-Wave Excitation in Systems with Nonuniform Magnetic Exchange
• First-principles study of exchange stiffness constant of half-metallic Heusler alloys Co2MnZ (Z= Si, Al) at finite temperatures: Spin fluctuation-induced effective half metallicity
• Anisotropic Magnon Spin Transport in Ultra-thin Spinel Ferrite Thin Films -- Evidence for Anisotropy in Exchange Stiffness