Effect of magnetic order on the superfluid response of single-crystal ErNi${}_2$B${}_2$C: A penetration depth study

Elbert E. M. Chia, W. Cheong, Tuson Park +3

We report measurements of the in-plane magnetic penetration depth $\Delta \lambda$(T) in single crystals of ErNi${}_2$B${}_2$C down to $\sim$0.1 K using a tunnel-diode based, self-inductive te…