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

Автор(и)

  • V.G. Prokhorov Institute of Metal Physics, NASU, Kiev 03142, Ukraine
  • Yu.M. Nikolaenko Donetsk Institute for Physics and Technology, NASU, Donetsk 83114, Ukraine
  • G.G. Levtchenko Donetsk Institute for Physics and Technology, NASU, Donetsk 83114, Ukraine
  • V.L. Svetchnikov National Center for HREM, TU Delft 2628AL, The Netherlands
  • Y.P. Lee 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
  • T.W. Eom q-Psi and Department of Physics, Hanyang University, Seoul 133-791, Korea
  • J.M. Kim q-Psi and Department of Physics, Hanyang University, Seoul 133-791, Korea
  • G.G. Kaminsky Institute of Metal Physics, NASU, Kiev 03142, Ukraine
  • V.A. Khokhlov Donetsk Institute for Physics and Technology, NASU, Donetsk 83114, Ukraine

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.3592229

Ключові слова:

colossal magnetoresistance, charge ordering, percolation, magnetic 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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Опубліковано

2011-02-28

Як цитувати

(1)
V.G. Prokhorov, Yu.M. Nikolaenko, G.G. Levtchenko, V.L. Svetchnikov, Y.P. Lee, J.S. Park, T.W. Eom, J.M. Kim, G.G. Kaminsky, and V.A. Khokhlov, Origin of an enhanced colossal magnetoresistance effect in epitaxial Nd0.52Sr0.48MnO3 thin films, Low Temp. Phys. 37, (2011) [Fiz. Nizk. Temp. 37, 392-396, (2011)] DOI: https://doi.org/10.1063/1.3592229.

Номер

Том 37 № 4 (2011)

Розділ

Низькотемпературний магнетизм

Завантаження

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