Narrow superconducting window in Ni-doped LaFeAsO

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dc.creatorCao, Guanghan
dc.creatorJiang, Shuai
dc.creatorLin, Xiao
dc.creatorWang, Cao
dc.creatorLi, Yuke
dc.creatorRen, Zhi
dc.creatorTao, Qian
dc.creatorDai, Jianhui
dc.creatorXu, Zhu'an
dc.creatorZhang, Fu-Chun
dc.date2008-07-27
dc.date2009-04-16
dc.date.accessioned2026-07-07T13:11:39Z
dc.date.available2026-07-07T13:11:39Z
dc.descriptionWe have studied Ni-substitution effect in LaFe$_{1-x}$Ni$_{x}$AsO ($0\leq x \leq0.1$) by the measurements of x-ray diffraction, electrical resistivity, magnetic susceptibility, and heat capacity. The nickel doping drastically suppresses the resistivity anomaly associated with spin-density-wave ordering in the parent compound. Superconductivity emerges in a narrow region of $0.03\leq x \leq0.06$ with the maximum $T_c$ of 6.5 K at $x$=0.04, where enhanced magnetic susceptibility shows up. The upper critical field at zero temperature is estimated to exceed the Pauli paramagnetic limit. The much lowered $T_c$ in comparison with LaFeAsO$_{1-x}$F$_{x}$ system is discussed.
dc.description6 pages, 7 figures and 3 tables. Accepted for publication in PRB
dc.identifierhttps://arxiv.org/abs/0807.4328
dc.identifierhttp://arxiv.org/abs/0807.4328
dc.identifierPhys. Rev. B 79, 174505 (2009).
dc.identifierdoi:10.1103/PhysRevB.79.174505
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229352
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleNarrow superconducting window in Ni-doped LaFeAsO
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