Low-temperature Electrical Transport and Double Exchange In

Abstract

The resistivity in the ferromagnetic state of flux-grown La2/3(Pb,Ca)1/3MnO3 single crystals reveals a strong quadratic temperature dependence at and above 50 K. At lower temperatures, this contribution drops precipitously leaving the resistivity essentially temperature independent below 20 K. The Seebeck coefficient also reflects a change behavior at the same temperature. We attribute this behavior to a cut-off of single magnon scattering processes at long wavelengths due to the polarized bands of a double-exchange ferromagnet. PACS: 73.10Di; 72.15.Jf; 75.30.Cr Typeset using REVTEX Present address: Los Alamos National Laboratory, MSK764, Los Alamos, NM 87545

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Cite this paper

@inproceedings{Jaime1997LowtemperatureET, title={Low-temperature Electrical Transport and Double Exchange In}, author={Marcelo Jaime and Peiying Lin and Myron B. Salamon and P. Han}, year={1997} }