Itinerant Ferromagnetism in layered crystals LaCoOX (X = P, As)

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dc.creatorYanagi, Hiroshi
dc.creatorKawamura, Ryuto
dc.creatorKamiya, Toshio
dc.creatorKamihara, Yoichi
dc.creatorHirano, Masahiro
dc.creatorNakamura, Tetsuya
dc.creatorOsawa, Hitoshi
dc.creatorHosono, Hideo
dc.date2008-06-01
dc.date.accessioned2026-07-07T09:51:59Z
dc.date.available2026-07-07T09:51:59Z
dc.descriptionThe electronic and magnetic properties of cobalt-based layered oxypnictides, LaCoOX (X = P, As), are investigated. LaCoOP and LaCoOAs show metallic type conduction, and the Fermi edge is observed by hard x-ray photoelectron spectroscopy. Ferromagnetic transitions occur at 43 K for LaCoOP and 66 K for LaCoOAs. Above the transition temperatures, temperature dependence of the magnetic susceptibility follows the Curie-Weiss law. X-ray magnetic circular dichroism (XMCD) is observed at the Co L2,3-edge, but not at the other edges. The calculated electronic structure shows a spin polarized ground state. These results indicate that LaCoOX are itinerant ferromagnets and suggest that their magnetic properties are governed by spin fluctuation.
dc.description16 pages, 9 figures, Physical Review B, in press. Received 17 February 2008. Accepted 29 May 2008
dc.identifierhttps://arxiv.org/abs/0806.0123
dc.identifierhttp://arxiv.org/abs/0806.0123
dc.identifierPhys. Rev. B 77, 224431 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.224431
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/165439
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleItinerant Ferromagnetism in layered crystals LaCoOX (X = P, As)
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