Abstract
Zero field μSR has been used to probe rare earth spin dynamics in the magnetic superconductors, Y1−x Er x Ni2B2C. The muon spin relaxation function is stretched exponential, exp (−(λt)β), in form, as usually found for spin glass systems above the glass temperature. However, the Y1−x Er x Ni2B2C compounds show no evidence of coexisting superconducting and static spin glass ground states even at concentrations below the critical value (x=0.6) for long range antiferromagnetic order. The temperature dependence of both the muon spin relaxation rate λ and the exponent β suggests that Er spin dynamics change significantly at the superconducting transition temperature.
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Hillier, A.D., Preston, J.M., Stewart, J.R. et al. A μSR Study of Er Spin Dynamics in (Y1−x Er x )Ni2B2C Superconductors. Hyperfine Interactions 136, 313–319 (2001). https://doi.org/10.1023/A:1020521305830
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DOI: https://doi.org/10.1023/A:1020521305830