Extrinsic electronic transport in La0.7(Sr,Ca)0.3MnO3 films deposited on step edges and bicrystal substrates

Journal of Physics. Condensed Matter : an Institute of Physics Journal
R B GangineniL Schultz

Abstract

In this paper, the electronic transport of La(0.7)(Sr,Ca)(0.3)MnO(3) films grown by pulsed laser deposition on a LaAlO(3)(001) substrate with deep parallel structured steps and a 30° symmetric bicrystal SrTiO(3)(001) substrate have been discussed. The electronic transport properties have been related to the well-known extrinsic transport of bulk manganite compounds. The spin-glass-like behavior with a characteristic peak at 20 K and domain formation at the grain boundary is observed. Further, it has been quantified from the resonant tunneling model that mixed magnetic interactions play a significant role in the manganite films deposited on step edges.

References

Dec 1, 1996·Physical Review. B, Condensed Matter·A GuptaJ Z Sun
Sep 2, 1996·Physical Review Letters·H Y HwangB Batlogg
Feb 21, 2006·Physical Review Letters·M WagenknechtD Koelle

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