Field-dependent diamagnetic transition in magnetic superconductor $Sm_{1.85} Ce_{0.15} Cu O_{4-y}$

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dc.creatorProzorov, R.
dc.creatorLawrie, D. D.
dc.creatorHetel, I.
dc.creatorFournier, P.
dc.creatorGiannetta, R. W.
dc.date2004-06-04
dc.date.accessioned2026-07-07T02:58:29Z
dc.date.available2026-07-07T02:58:29Z
dc.descriptionThe magnetic penetration depth of single crystal $\rm{Sm_{1.85}Ce_{0.15}CuO_{4-y}}$ was measured down to 0.4 K in dc fields up to 7 kOe. For insulating $\rm{Sm_2CuO_4}$, Sm$^{3+}$ spins order at the Néel temperature, $T_N = 6$ K, independent of the applied field. Superconducting $\rm{Sm_{1.85}Ce_{0.15}CuO_{4-y}}$ ($T_c \approx 23$ K) shows a sharp increase in diamagnetic screening below $T^{\ast}(H)$ which varied from 4.0 K ($H = 0$) to 0.5 K ($H =$ 7 kOe) for a field along the c-axis. If the field was aligned parallel to the conducting planes, $T^{\ast}$ remained unchanged. The unusual field dependence of $T^{\ast}$ indicates a spin freezing transition that dramatically increases the superfluid density.
dc.description4 pages, RevTex 4
dc.identifierhttps://arxiv.org/abs/cond-mat/0406110
dc.identifierhttp://arxiv.org/abs/cond-mat/0406110
dc.identifierPhys. Rev. Lett. 93 (14), 147001 (2004)
dc.identifierdoi:10.1103/PhysRevLett.93.147001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24111
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleField-dependent diamagnetic transition in magnetic superconductor $Sm_{1.85} Ce_{0.15} Cu O_{4-y}$
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