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Journals Applied Physics Letters Volume 100 Issue 6

The erasure of photoinduced resistance (PR) by the magnetic field was investigated in manganite films. The PR was significantly suppressed when a magnetic field was introduced at low temperature. The decrease (or increase) of PR with increment of magnetic field was observed in ferromagnetic (or paramagnetic) phases of films, respectively. Our results are suggested to be the coaction of two effects under magnetic fields: (i) the reorientation of domains and spin directions of photoexcited carriers and (ii) electrons trapped around oxygen vacancies released and recombined with majority carriers in films. The interplay of the external fields is a good demonstration of the strong coupling between spins and charges in colossal magnetoresistance materials.

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Suppression of photoconductivity by magnetic field in epitaxial manganite thin films

Guo, E. J.; Wang, L.; Lu, H. B.; Guo, H. Z.; He, M.; Jin, K. J.; Yang, G. Z.; Gao, J.
Applied Physics Letters , Volume 100 (6)
American Institute of Physics – Feb 6, 2012

More Info
  • Publisher American Institute of Physics
  • Copyright Copyright © 2012 American Institute of Physics
  • ISSN 0003-6951
  • eISSN 1077-3118
  • D.O.I. 10.1063/1.3683551
  • Publisher site Get PDF  

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