Anisotropic magnetoresistive and magnetic properties of La_{0.5}Sr_{0.5}CoO_{3-\delta} film

TL;DR

This study investigates the magnetic and transport properties of La_{0.5}Sr_{0.5}CoO_{3- extdelta} films, revealing anisotropic magnetoresistance and a temperature-driven spin reorientation transition influenced by magnetic anisotropy and strain effects.

Contribution

It provides new insights into how magnetic anisotropy and strain affect the magnetoresistance and spin states in La_{0.5}Sr_{0.5}CoO_{3- extdelta} films.

Findings

Magnetoresistance anisotropy is shaped by shape and strain-induced anisotropies.

Evidence of a temperature-driven spin reorientation transition.

Magnetic properties are influenced by film-substrate lattice interactions.

Abstract

The magnetic and transport properties of La_{0.5}Sr_{0.5}CoO_{3-\delta} film grown on a LaAlO_3 substrate by pulsed-laser deposition are studied. The properties are found to be influenced by the magnetic anisotropy and inhomogeneity. Magnetoresistance anisotropy is determined by the shape anisotropy of the magnetization and the strain-induced magnetic anisotropy due to the film-substrate lattice interaction. Indications of the temperature-driven spin reorientation transition from an out-of plane orderded state at low temperatures to an in-plane ordered state at high temperatures as a result of competition between the mentioned sources of magnetic anisotropy are found.