High spin polarization in the ferromagnetic filled skutterudites KFe4Sb12 and NaFe4Sb12

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dc.creatorSheet, Goutam
dc.creatorRosner, H.
dc.creatorWirth, S.
dc.creatorLeithe-Jasper, A.
dc.creatorSchnelle, W.
dc.creatorBurkhardt, U.
dc.creatorMydosh, J. A.
dc.creatorRaychaudhuri, P.
dc.creatorGrin, Yu.
dc.date2005-10-27
dc.date.accessioned2026-07-07T06:45:35Z
dc.date.available2026-07-07T06:45:35Z
dc.descriptionThe spin polarization of ferromagnetic alkali-metal iron antimonides KFe4Sb12 and NaFe4Sb12 is studied by point-contact Andreev reflection using superconducting Nb and Pb tips. From these measurements an intrinsic transport spin polarization Pt of 67% and 60% for the K and Na compound, respectively, is inferred which establishes these materials as a new class of highly spin polarized ferromagnets. The results are in accord with band structure calculations within the local spin density approximation (LSDA) that predict nearly 100% spin polarization in the density of states. We discuss the impact of calculated Fermi velocities and spin fluctuations on Pt.
dc.descriptionPdf file with fig
dc.identifierhttps://arxiv.org/abs/cond-mat/0510736
dc.identifierhttp://arxiv.org/abs/cond-mat/0510736
dc.identifierPhys. Rev. B 72, 180407(R) (2005)
dc.identifierdoi:10.1103/PhysRevB.72.180407
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/103081
dc.subjectMaterials Science
dc.subjectStrongly Correlated Electrons
dc.titleHigh spin polarization in the ferromagnetic filled skutterudites KFe4Sb12 and NaFe4Sb12
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