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Evidence for spin liquid ground state in SrDy$_2$O$_4$ frustrated magnet probed by muSR

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arxiv 1702.07161 v1 pith:MFWFVEJ3 submitted 2017-02-23 cond-mat.str-el

N. Gauthier , B. Prévost , A. Amato , C. Baines , V. Pomjakushin , A. D. Bianchi , R. J. Cava , M. Kenzelmann This is my paper
classification cond-mat.str-el
keywords spinfluctuationsmagneticmuonsrdycorrelationsdepolarizationdown
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abstract

Muon spin relaxation ($\mu$SR) measurements were carried out on SrDy$_2$O$_4$, a frustrated magnet featuring short range magnetic correlations at low temperatures. Zero-field muon spin depolarization measurements demonstrate that fast magnetic fluctuations are present from $T=300$ K down to 20 mK. The coexistence of short range magnetic correlations and fluctuations at $T=20$ mK indicates that SrDy$_2$O$_4$ features a spin liquid ground state. Large longitudinal fields affect weakly the muon spin depolarization, also suggesting the presence of fast fluctuations. For a longitudinal field of $\mu_0H=2$ T, a non-relaxing asymmetry contribution appears below $T=6$ K, indicating considerable slowing down of the magnetic fluctuations as field-induced magnetically-ordered phases are approached.

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