Magnetic proximity effect in Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3bilayered films

Autor:	Junghum Park, V. L. Svetchnikov, J. M. Kim, V. G. Prokhorov, G. G. Kaminsky, V. S. Flis, Y. P. Lee, T. W. Eom
Rok vydání:	2012
Předmět:	Diffraction Lattice constant Exchange bias Materials science Physics and Astronomy (miscellaneous) Ferromagnetism Condensed matter physics Bilayer X-ray crystallography General Physics and Astronomy Electron Pulsed laser deposition
Zdroj:	Low Temperature Physics. 38:41-48
ISSN:	1090-6517 1063-777X
DOI:	10.1063/1.3677235
Popis:	Magnetotransport properties of the Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3 bilayer and the Pr0.5Ca0.5 MnO3and La0.7Sr0.3MnO3 films deposited on LaAlO3 (001) substrate by pulse laser deposition were investigated. X-ray diffraction and high-resolution electron-microscopy analysis reveal that lattice parameters for the constituent sublayers in the bilayer are very close to those for the individual films. It was found that a ferromagnetic transition in the La0.7Sr0.3MnO3 sublayer significantly modifies magnetotransport properties of the Pr0.5Ca0.5MnO3 constituent sublayer due to the magnetic proximity effect. Evidence of this effect includes the appearance of exchange bias interaction between the constituent sublayers, a localized-to-itinerant crossover in the system of polarized electrons, which results in formation of the Griffiths-like ferromagnetic state, and an unusual polar transport of carriers. Experimental results were analyzed within the framework of the modern theoretical approach.
Databáze:	OpenAIRE
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