Origin of an enhanced colossal magnetoresistance effect in epitaxial Nd₀.₅₂Sr₀.₄₈MnO₃ thin films

Origin of an enhanced colossal magnetoresistance effect in epitaxial Nd₀.₅₂Sr₀.₄₈MnO₃ thin films

Prokhorov, V.G. ; Kaminsky, G.G. ; Kim, J.M. ; Eom, T.W. ; Park, J.S. ; Lee, Y.P. ; Svetchnikov, V.L. ; Levtchenko, G.G. ; Nikolaenko, Yu.M. ; Khokhlov, V.A.

Тема: Низкотемпературный магнетизм

Інший ID: PACS: 71.30.+h, 75.47.Gk, 75.47.Lx

URI: http://dspace.nbuv.gov.ua/handle/123456789/118533

Посилання: Origin of an enhanced colossal magnetoresistance effect in epitaxial Nd₀.₅₂Sr₀.₄₈MnO₃ thin films / V.G. Prokhorov, G.G. Kaminsky, J.M. Kim, T.W. Eom, J.S. Park, Y.P. Lee, V.L. Svetchnikov, G.G. Levtchenko, Yu.M. Nikolaenko, V.A. Khokhlov // Физика низких температур. — 2011. — Т. 37, № 4. — С. 392–396. — Бібліогр.: 16 назв. — англ.

Підтримка: This work was supported by the NRF/MEST through the Quantum Photonic Science Research Center, Korea. V. Svetchnikov is grateful to the financial support of Netherlands Institute for Metal Research.

Дата: 2011

Завантажень: 355

Origin of an enhanced colossal magnetoresistance effect in epitaxial Nd₀.₅₂Sr₀.₄₈MnO₃ thin films

Анотація:

Nd₀.₅₂Sr₀.₄₈MnO₃ films with the different thickness have been prepared by dc magnetron sputtering on LaAlO₃ (001) single-crystalline substrates. A decrease of the film thickness leads to a significant suppression of the ferromagnetic (FM) ordering and the Curie point becomes below the antiferromagnetic (AFM) transition temperature. As this take place, a huge rise of the magnetoresistance ratio from 400 to 60 000% at an applied magnetic field of 5 T is observed. We consider that this new kind of the enhanced colossal magnetoresistance effect is originated from the FM/AFM competition and the collapse of the charge-ordered state at high magnetic field rather than through the regular double-exchange mechanism.

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