title: Extrinsic electronic transport in La0.7(Sr,Ca)0.3MnO3 films deposited on step edges and bicrystal substrates.
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.
authors.affiliation: Department of Physics, Pondicherry University, RV Nagar, Kalapet, Puducherry, India. rameshg.phy@pondiuni.edu.in
authors.forename: R B
authors.initials: RB
authors.lastname: Gangineni
authors.forename: N
authors.initials: N
authors.lastname: Kozlova
authors.forename: K
authors.initials: K
authors.lastname: Nenkov
authors.forename: K
authors.initials: K
authors.lastname: Dörr
authors.forename: L
authors.initials: L
authors.lastname: Schultz