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Dielectric response to the low-temperature magnetic defect structure and spin state transition in polycrystalline LaCoO_(3)

Schmidt, Rainer ; Wu, J. ; Leighton, C. ; Terry, I. | American Physical Society | 2009-03

The dielectric and magnetic properties and their correlations were investigated in polycrystalline perovskite LaCoO_(3). The intrinsic bulk and grain-boundary (GB) dielectric relaxation processes were deconvoluted using impedance spectroscopy be[...]

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Effects of interface states on the transport properties of all-oxide La_(0.8)Sr_(0.2)CoO_(3)/SrTi_(0.99)Nb_(0.01)O_(3) p-n heterojunctions

Bruno, F. Y. ; Garcia Barriocanal, Javier ; Torija, M. ; Rivera Calzada, Alberto Carlos ; Sefrioui, Zouhair ; Leighton, C. ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2008-02-25

Electrical transport properties of heteroepitaxial p-n junctions made of La_(0.8)Sr_(0.2)CoO_(3) and SrTi_(0.99)Nb_(0.01)O_(3) were studied. Junctions display highly rectifying current-voltage characteristics over a wide temperature range (20–30[...]

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