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

• Опубліковано в: : Физика низких температур
• Дата: 2012
• Автори: Prokhorov, V.G., Kaminsky, G.G., Flis, V.S., Kim, J.M., Eom, T.W., Park, J.S., Lee, Y.P., Svetchnikov, V.L.
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2012
• Теми: Низкотемпеpатуpный магнетизм
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/116770
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Magnetic proximity effect in Pr₀.₅Ca₀.₅MnO₃/La₀.₇Sr₀.₃MnO₃ bilayered films / V.G. Prokhorov, G.G. Kaminsky, V.S. Flis, J.M. Kim, T.W. Eom, J.S. Park, Y.P. Lee, V.L. Svetchnikov // Физика низких температур. — 2012. — Т. 38, № 1. — С. 52-61. — Бібліогр.: 44 назв. — рос.

The magnetotransport properties of Pr₀.₅Ca₀.₅MnO₃/La₀.₇Sr₀.₃MnO₃ bilayer, and Pr₀.₅Ca₀.₅MnO₃ and La₀.₇Sr₀.₃MnO₃ films, deposited on LaAlO₃ (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 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.