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

Автор(и)

  • V.G. Prokhorov Institute of Metal Physics of National Academy of Sciences of Ukraine, Kiev 03142, Ukraine
  • G.G. Kaminsky Institute of Metal Physics of National Academy of Sciences of Ukraine, Kiev 03142, Ukraine
  • V.S. Flis Institute of Metal Physics of National Academy of Sciences of Ukraine, Kiev 03142, Ukraine
  • J.M. Kim q-Psi and Department of Physics, Hanyang University, Seoul 133-791, Korea
  • T.W. Eom q-Psi and Department of Physics, Hanyang University, Seoul 133-791, Korea
  • J.S. Park q-Psi and Department of Physics, Hanyang University, Seoul 133-791, Korea
  • Y.P. Lee q-Psi and Department of Physics, Hanyang University, Seoul 133-791, Korea
  • V.L. Svetchnikov National Center for HREM, TU Delft 2628AL, The Netherlands

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.3677235

Ключові слова:

magnetotransport properties, ferromagnetic transition, magnetic proximity effect.

Анотація

The magnetotransport properties of Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3 bilayer, and Pr0.5Ca0.5MnO3 and La0.7Sr0.3MnO3 films, deposited on LaAlO 3 (001) 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 La0.7Sr0.3MnO3 sublayer significantly modifies the magnetotransport properties of the Pr0.5Ca0.5MnO3 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 localized-to-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.

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Опубліковано

2011-11-22

Як цитувати

(1)
V.G. Prokhorov, G.G. Kaminsky, V.S. Flis, J.M. Kim, T.W. Eom, J.S. Park, Y.P. Lee, and V.L. Svetchnikov, Magnetic proximity effect in Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3 bilayered films, Low Temp. Phys. 38, (2011) [Fiz. Nizk. Temp. 38, 52-61, (2011)] DOI: https://doi.org/10.1063/1.3677235.

Номер

Том 38 № 1 (2012)

Розділ

Низькотемпературний магнетизм

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