Microscopic spin interactions in the CMR manganites

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dc.creatorFernandez-Baca, J. A.
dc.creatorDai, Pengcheng
dc.creatorKawano-Furukawa, H.
dc.creatorYoshizawa, H.
dc.creatorPlummer, E. W.
dc.creatorKatano, S.
dc.creatorTomioka, Y.
dc.creatorTokura, Y.
dc.date2001-10-31
dc.date.accessioned2026-07-07T02:43:21Z
dc.date.available2026-07-07T02:43:21Z
dc.descriptionUsing inelastic neutron scattering we measured the microscopic magnetic coupling associated with the ferromagnetic (FM) clusters of the ``colossal magnetoresistance'' (CMR) compound Pr$_{0.70}$Ca$_{0.30}$MnO$_3$. When the insulating to metal (I-M) transition is induced by an external magnetic field there is a discontinuous change in the spin-wave stiffness constant. This result indicates that the probed regions undergo a first-order transition from an insulating to a metallic state, and that there are no FM metallic domains in the insulating region. We argue that the I-M transition in the CMR manganites is more complex than the simple percolation of large FM metallic clusters.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0110659
dc.identifierhttp://arxiv.org/abs/cond-mat/0110659
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18464
dc.subjectStrongly Correlated Electrons
dc.titleMicroscopic spin interactions in the CMR manganites
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