Spin-glass-like behaviour and positive magnetoresistance in oxygen deficient La2/3Ca1/3MnO3?? thin films
2004
The magnetism and magnetoresistance (MR) in a series of oxygen-deficient La2/3Ca1/3MnO3−δ (LCMO) thin films have been investigated. Compared with the films with stoichiometric oxygen concentration, the oxygen-deficient LCMO thin films show a spin-glass-like behaviour at low temperatures and a positive MR effect above the metal–insulator transition temperature. The mechanism of such unusual phenomena is discussed.
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