Abstract
Polycrystalline samples with nominal compositions Pr0.5Sr0.5Mn0.5Cu0.5O3 and Pr0.5Sr0.5Mn0.5 Ru0.5O3 were synthesized and their magnetical and transport properties were investigated. It was shown that Pr0.5Sr0.5Mn0.5Cu0.5O3 is an insulator with an AFM state accompanied by weak FM at low temperatures. The transport mechanism in this highly doped with Cu manganite can be explained by a conventional thermal activation. The Pr0.5Sr0.5Mn0.5Ru0.5O3 material has a PM-FM transition beginning at T C ≈ 325 K and a FM-AFM one—at about 160 K. The low magnetization values and temperature and field dependencies of the magnetization suggest a phase separation of anomalous FM state and AFM state below the FM-AFM transition. The carrier transport in the highly doped with Ru manganites can be described by a small polaron hopping model.
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Balchev, N., Kunev, B., Pirov, J. et al. Synthesis, Magnetic, and Transport Properties of Highly Doped with Cu or Ru Manganites. Journal of Superconductivity 17, 519–523 (2004). https://doi.org/10.1023/B:JOSC.0000041790.40920.fc
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DOI: https://doi.org/10.1023/B:JOSC.0000041790.40920.fc