Magnetic proximity effect in Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3 bilayered films

Abstract

substrate by pulse laser deposition have been investigated. The x-ray diffraction and high-resolution electron-microscopy analysis reveals that lattice parameters for the constituent sublayers in the bilayer are very close to that for the individual films. It was found that a ferromagnetic transition in the La 0.7 Sr 0.3 MnO 3 sublayer significantly modifies the magnetotransport properties of the Pr 0.5 Ca 0.5 MnO 3 constituent sublayer, owing to occurrence of a magnetic proximity effect. The main evidences for this effect are an appearance of the exchange bias interaction between the constituent sublayers; a localizedto-itinerant crossover in the system of polarized electrons, which results in formation of the Griffiths-like ferromagnetic state; and an unusual polaron transport of carriers. The experimental results have been analyzed within the framework of modern theoretical approaches. PACS

Towards room-temperature and above magnetoelectricity in CoFe2O4/Cr2O3 core/shell nanoparticles

“…To perceive the magnetic proximity effect, a bimagnetic system is constructed in such a manner that the one component's magnetic ordering temperature is notably higher than the other. A prominent consequence of such a coupled FM/AFM systems is that the component with greater ordering temperature does indeed induces magnetic ordering in the other (above its magnetic ordering temperature) [28] and may also exhibits exchange bias phenomenon (one of the principal ingredient of modern-days information technology; spintronics in particular) [29][30][31].…”