Low field magnetic response of the non-centrosymmetric superconductor YPtBi

Bay, T.V.; Jackson, M.; Paulsen, C.; Baines, C.; Amato, A.; Orvis, T.; Aronson, M.C.; Huang, Y.K.; De Visser, A.

doi:10.1016/j.ssc.2013.12.010

Low field magnetic response of the non-centrosymmetric superconductor YPtBi

Bay TV, Jackson M, Paulsen C, Baines C, Amato A, Orvis T, Aronson MC, Huang YK & De Visser A

Citation

Bay, T. V., Jackson, M., Paulsen, C., Baines, C., Amato, A., Orvis, T., … De Visser, A. (2014). Low field magnetic response of the non-centrosymmetric superconductor YPtBi. Solid State Communications, 183, 13-17. https://doi.org/10.1016/j.ssc.2013.12.010

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:9106

The low-field magnetic response of the non-centrosymmetric superconductor YPtBi (T_c=0.77 K) is investigated. Ac-susceptibility and dc-magnetization measurements provide solid evidence for bulk superconductivity with a volume fraction of ~70%. The lower critical field is surprisingly small: B_c1=0.008mT (T→0). Muon spin rotation experiments in a transverse magnetic field of 0.01 T show a weak increase of the Gaussian damping rate σ_TF below T_c, which yields a London penetration depth λ=1.6 ± 0.2μm. The zero-field Kubo-Toyabe relaxation rate σ_KT equals 0.129 ± 0.004 μs^-1 and does not show a significant change below T_c. This puts an upper bound of 0.04 mT on the spontaneous magnetic field associated with a possible odd-parity component in the superconducting order parameter.