Abstract
The AC susceptibility of a novel rare-earth boron-cluster-containing spin glass was measured.REB17CN,REB22C2N,and REB28.5C4 (RE = Er,Ho)are a newly discovered class of crystalline, non-doped spin glass system in which the rare-earth atomshave a two-dimensional configuration. Well defined maxima in the in-phase linear AC susceptibilityof HoB22C2N were observed with corresponding behaviour of the out-of-phase susceptibility as expectedfor a spin glass. It was found that the dynamical scaling theory of a 3D system,τ/τ0 = [(T−T0)/T]−zν, could not describe the data well. More reasonable parameters could be extracted in termsof a generalized Arrhenius law which describes 2D spin glass systems. This result is in agreement with the previousstudies which indicate the two-dimensionality of this system.
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