In-plane magnetic anisotropy and magnetization reversal in phase-separated (La0.5Pr0.5)0.625Ca0.375MnO3 thin films

The dynamics and interaction of different electronic phases near the metal-to-insulator transition of the phase-separated (La0.5Pr0.5)0.625Ca0.375MnO3 (LPCMO) thin film grown on NGO substrate was studied using the first-order reversal curves (FORC) diagram method for electric transport measurements. The in-plane angle-dependent remanence and coercivity field in the region of the ferromagnet metallic phase was measured using the macroscopic magnetization technique. These measurements suggest an in-plane uniaxial magnetic anisotropy for the film with a uniaxial anisotropic constant (Ku) of -1.2 x 106 erg/cm3 at 20 K. The angle dependence of the coercivity is best described by 1/cos theta dependence indicating that the magnetization reversal occurs mainly through the depinning of the domain wall, a signature of nucleation and propagation mechanism. The correlation of FORC measurements, resistance relaxation, and macroscopic magnetic measurements indicate a fast reversal of electronic and magnetic phases towards the denser phase region and strong interaction of different phases for the LPCMO system.

Automated summary

The dynamics and interaction of different electronic phases near the metal-to-insulator transition of the phase-separated (La0.5Pr0.5)0.625Ca0.375MnO3 (LPCMO) thin film were studied. Measurements of the in-plane angle-dependent remanence and coercivity field indicate an in-plane uniaxial magnetic anisotropy for the film. The correlation between FORC measurements, resistance relaxation, and macroscopic magnetic measurements suggests a fast reversal of electronic and magnetic phases and strong interaction of different phases for the LPCMO system.