New insight on spin polarized current injection in high-T $\mathsf{_c}$ cuprate/manganite devices

J. Dumont, M. Moragués, B. Leridon (), J. Lesueur and J. Contour

The European Physical Journal B: Condensed Matter and Complex Systems, 2003, vol. 35, issue 3, 331-337

Abstract: Recently, numerous experiments have been reported on critical current reductions in thin films cuprates as being due to spin injection from ferromagnetic manganites. However, little theoretical justification for these very strong effects exists, and the necessary spin relaxation length is always larger than predictions. In the present work, we investigate the possibility that these effects are due to a different origin and we report on devices designed such that the temperature of the layer itself can be measured in situ. Our data show that similar reductions of the critical current are quantitatively correlated to heating in the manganite electrode due to dissipation of the polarization current. Copyright Springer-Verlag Berlin/Heidelberg 2003

Date: 2003
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DOI: 10.1140/epjb/e2003-00285-1

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