Magnetization dynamics of the compensated ferrimagnet $Mn_{2}Ru_{x}Ga$

A. Kirilyuk; A. V. Kimel; G. Bonfiglio; G. Y. P. Atcheson; J. Besbas; J. M. D. Coey; K. Rode; K. Siewerska; P. Stamenov; Th. Rasing

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Magnetization dynamics of the compensated ferrimagnet $Mn_{2}Ru_{x}Ga$

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arxiv 1909.09085 v1 pith:J2YPC4RA submitted 2019-09-19 cond-mat.mtrl-sci

G. Bonfiglio , K. Rode , K. Siewerska , J. Besbas , G. Y. P. Atcheson , P. Stamenov , J. M. D. Coey , A. V. Kimel

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Th. Rasing A. Kirilyuk

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classification cond-mat.mtrl-sci

keywords ferrimagnetcompensatedmagnetictemperaturealphaanalysedanisotropyapplications

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abstract

Here we study both static and time-resolved dynamic magnetic properties of the compensated ferrimagnet from room temperature down to 10K, thus crossing the magnetic compensation temperature $T_{M}$. The behaviour is analysed with a model of a simple collinear ferrimagnet with uniaxial anisotropy and site-specific gyromagnetic ratios. We find a maximum zero-applied-field resonance frequency of $\sim$160GHz and a low intrinsic Gilbert damping $\alpha$$\sim$0.02, making it a very attractive candidate for various spintronic applications.

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