title: Low-temperature magnetic and transport anisotropy in manganite thin films.
abstract: The stability of striped magnetic phases in films of La(1-x)A(x)MnO(3) perovskites is investigated. A variational analysis is developed for different film thicknesses at fixed hole density (x = 0.3) and the competition among magnetic phases as a function of the transfer integral and the temperature is analyzed. The stabilization of an in-plane striped magnetic phase is observed with reducing the film thickness at low temperatures below the metal-insulator transition temperature. Within the adopted variational scheme, treating perturbatively the residual electron-phonon interaction, the dependence of the in-plane resistivity on temperature for different thicknesses is calculated. At low temperatures, due to the striped magnetic phase, the resistivity shows an important in-plane anisotropy. The obtained results are found to be consistent with experiments.
authors.affiliation: CNR-INFM Coherentia and Università degli Studi di Napoli Federico II, Dipartimento di Scienze Fisiche, Complesso Universitario Monte S Angelo, Via Cintia, I-80126 Napoli, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Iorio
authors.forename: C A
authors.initials: CA
authors.lastname: Perroni
authors.forename: G De
authors.initials: GD
authors.lastname: Filippis
authors.forename: V
authors.initials: V
authors.lastname: Marigliano Ramaglia
authors.forename: V
authors.initials: V
authors.lastname: Cataudella