Colossal negative magnetoresistance ∆ρ(T, B) = ρ(T, B)− ρ(T, 0) observed in La0.6Y0.1Ca0.3M nO3 at B = 1T shows a nearly perfect symmetry around T0 = 160K suggesting a universal field-induced transport mechanism in this material. Attributing this symmetry to strong magnetic fluctuations (triggered by the Y substitution and further enhanced by magnetic field, both above and below the field-dependent Curie temperature TC(B) ≡ T0), the data are interpreted in terms of the nonthermal spin hopping and magnetization M dependent charge carrier localization scenario leading to ∆ρ = −ρs 1 − e −γM 2 with M (T, B) = CB/|T − TC| ν . The separate fits through all the data points above and below TC yield C + ≃ C − and ν + ≃ ν − ≃ 1. The obtained results corroborate the importance of fluctuation effects in this material recently found to dominate its magneto-thermopower behavior far beyond TC.
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