Influence of Thickness on the Magnetic and Magnetotransport Properties of Epitaxial La0.7Sr0.3MnO3 Films Deposited on STO (0 0 1)

Abstract

Epitaxial La0.7Sr0.3MnO3 films with different thicknesses (9–90 nm) were deposited on SrTiO3 (0 0 1) substrates by pulsed laser deposition. The films have been investigated with respect to morpho-structural, magnetic, and magneto-transport properties, which have been proven to be thickness dependent. Magnetic contributions with different switching mechanisms were evidenced, depending on the perovskite film thickness. The Curie temperature increases with the film thickness. In addition, colossal magnetoresistance effects of up to 29% above room temperature were evidenced and discussed in respect to the magnetic behavior and film thickness.

Epitaxial Ferroelectric Thin Films: Potential for New Applications

“…In this chapter, conductive oxides, such as LSMO and SRO, were utilized as buffer materials and bottom electrodes in order to form structures similar to capacitors. The electric and magnetic characteristics of LSMO are dependent by several parameters, including La, Sr content, deposition temperature, thickness, and the crystalline structure of the layer [32][33][34]. The choice of using La 70 Sr 30 MnO 3 as the bottom electrode was based on our previous study of the resistivity properties, particularly its dependence on thickness [33].…”