Abstract
A field-induced crossover is observed in the resistivity (ρ) and magnetization (M) of a La0.7Pb0.3MnO3 single crystal. The field-dependence of ρ and M suggests that a small spin-canted species with mean-field-like interactions dominates at low fields (H), whereas individual spins and 3D Ising/Heisenberg models describe the high-H behavior rather well. Around the ferromagnetic transition, an H-induced destruction of the small spin-canted magnetic polarons is accompanied by large magnetoresistance.
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Chu, C.W., Xue, Y.Y., Lorenz, B., Heilman, A.K., Gospodinov, M., Dobreva, S.G. (2001). Field-Induced Crossover and Colossal Magnetoresistance in La0.7Pb0.3MnO3 . In: Kaplan, M.D., Zimmerman, G.O. (eds) Vibronic Interactions: Jahn-Teller Effect in Crystals and Molecules. NATO Science Series, vol 39. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0985-0_6
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DOI: https://doi.org/10.1007/978-94-010-0985-0_6
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