Evidence for spin liquid ground state in SrDy2O4 frustrated magnet probed by μSR

8th International Conference on Highly Frustrated Magnetism 2016

Gauthier, N.^1 ; Prévost, B.^2 ; Amato, A.^3 ; Baines, C.^3 ; Pomjakushin, V.^4 ; Bianchi, A.D.^2 ; Cava, R.J.^5 ; Kenzelmann, M.^1

Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, Villigen, Switzerland^1

Département de Physique, Université de Montreal, Montréal, Canada^2

Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut, Villigen, Switzerland^3

Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, Villigen, Switzerland^4

Department of Chemistry, Princeton University, Princeton

NJ, United States^5

关键词: Depolarization measurements;    Frustrated magnet;    Longitudinal fields;    Low temperatures;    Magnetic correlation;    Magnetic fluctuation;    Muon spin relaxation;    Ordered phasis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/828/1/012014/pdf
DOI  :  10.1088/1742-6596/828/1/012014

来源: IOP

【 摘 要 】

Muon spin relaxation (μSR) measurements were carried out on SrDy2O4, 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 SrDy2O4features 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 μ0H = 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.