Magnetic and electronic phase separation driven by structural clustering in La0.7 (Ca1-y Sry)0.3MnO3 thin films

Автор(и)

  • V.G. Prokhorov Institute of Metal Physics of the National Academy of Sciences of Ukraine, Kiev 03142, Ukraine
  • V.A. Komashko Institute of Metal Physics of the National Academy of Sciences of Ukraine, Kiev 03142, Ukraine
  • G.G. Kaminsky Institute of Metal Physics of the National Academy of Sciences of Ukraine, Kiev 03142, Ukraine
  • Y.P. Lee q-PSI and Department of Physics, Hanyang University, Seoul 133-791, Korea
  • Y.H. Hyun q-PSI and Department of Physics, Hanyang University, Seoul 133-791, Korea
  • K.K. Yu 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
  • V.L. Svetchnikov National Center for HREM, TU Delft 2628AL, The Netherlands

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.2216217

Ключові слова:

structural, magnetic and transport properties; magnetic phase diagram; crystal phases.

Анотація

The structural, magnetic and transport properties of La0.7 (Ca1-y Sry)0.3MnO3 films deposited on LaAlO3 (001) single-crystalline substrate by rf-magnetron sputtering using «soft» (or powder) targets are investigated. It was found that at 0.3 ≤ y ≤ 0.5 both rhombohedral (R̅3c) and orthorhombic (Pnma) crystal phases are coexistent at room temperature, forming a nanoclustered microstructure. The clustered films manifest the two-stage magnetic and electronic transition, which are typical for the phase-separated systems. It was shown that for 0.5≥ y ≥0 the nonlinear (almost parabolic) field-dependent magnetoresistance is typical at room temperature while for 0.65≤ y ≤1.0 its transform to the linear behavior. The magnetotransport properties of the films are explained within the framework of a field-dependent activation energy model. The magnetic phase diagram for the La0.7 (Ca1-y Sry)0.3MnO3 thin-film system is presented.

Downloads

Опубліковано

2006-05-17

Як цитувати

(1)
V.G. Prokhorov, V.A. Komashko, G.G. Kaminsky, Y.P. Lee, Y.H. Hyun, K.K. Yu, J.S. Park, and V.L. Svetchnikov, Magnetic and electronic phase separation driven by structural clustering in La0.7 (Ca1-y Sry)0.3MnO3 thin films, Low Temp. Phys. 32, (2006) [Fiz. Nizk. Temp. 32, 853-860, (2006)] DOI: https://doi.org/10.1063/1.2216217.

Номер

Том 32 № 7 (2006)

Розділ

Низькотемпературний магнетизм

Завантаження

Дані завантаження ще не доступні.

Статті цього автора (авторів), які найбільше читають

1 2 3 > >>