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  1. No Access

    Article

    A sharp decrease of resistivity in La0.7Ca0.3Mn0.96Cu0.04O3: Evidence for Cu-assisted coherent tunneling of spin Polarons

    Nearly a 50% decrease of the resistivity ρ(T, x) is observed upon just 4% Cu do** at the Mn site of La2/3Ca1/3Mn1−x CuxO3. When the observed phenomenon is attributed to a decrease of the spin-polaron energy E σ

    S. A. Sergeenkov, H. Bougrine, M. Ausloos… in Journal of Experimental and Theoretical Ph… (1999)

  2. No Access

    Article

    Negative magnetoresistance in mixed-valence La0.6Y0.1Ca0.3MnO3: Evidence for charge localization governed by the Curie-Weiss law

    The colossal negative magnetoresistance Δρ observed in La0.6Y0.1Ca0.3MnO3 at B=1 T shows an unusual, nearly perfect symmetry (around the peak temperature T 0=160 K), suggestive of a Curie-Weiss-dominated transpor...

    S. Sergeenkov, H. Bougrine, M. Ausloos… in Journal of Experimental and Theoretical Ph… (1999)

  3. No Access

    Article

    Anomalous temperature behavior of the resistivity in lightly doped manganites around a metal-insulator phase transition

    An unusual temperature and concentration behavior of the resistivity ρ(T, x) in La0.7Ca0.3Mn1−2x CuxO3 is observed at slight Cu do** (0≤x≤0.05). Namely, the introduction of copper results in a splitting of the ...

    S. Sergeenkov, M. Ausloos, H. Bougrine… in Journal of Experimental and Theoretical Ph… (1999)