Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-04-15
Applied Physics Letters 86, 192504 (2005)
Physics
Condensed Matter
Strongly Correlated Electrons
14 pages, 5 figures, to appear in Appl. Phys. Lett
Scientific paper
10.1063/1.1925312
The oxygen-deficient perovskite cobaltite SrCo1-xNbxO3-d was synthesized by direct solid-state reaction and its magnetotransport properties were investigated. This cobaltite exhibits an unusual ferromagnetic behavior with a transition temperature Tm = 130-150 K and a spin glass like behavior below Tm. Importantly, this phase reaches a large magnetoresistance (MR) value, MR = -(rH - r0) / r0 = 30% at 5 K in 7 T. The large MR effect is believed to be related to the disordered magnetic state induced by the Nb-for-Co substitution.
Caignaert Vincent
Hervieu Maryvonne
Maignan Antoine
Motohashi Teruki
Pralong Valerie
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