Hall resistivity in ferromagnetic manganese-oxide compounds |
| |
| Institution: | 1. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China;1. Escola de Engenharia de Lorena – USP, P.O. Box 116, Lorena, 12602-810, Brazil;2. Universidade Federal do Triângulo Mineiro, Rua Dr. Randolfo Borges Júnior 1250, Uberaba, 38066-200, Brazil;3. Department of Physics and Astronomy, University of California-Irvine, Irvine, CA 92697, USA;1. Marian Smoluchowski Institute of Physics, Jagiellonian University, ?ojasiewicza 11, 30-348 Kraków, Poland;2. Institute of Physics, University of Silesia, 75 Pu?ku Piechoty 1a, 41-500 Chorzów, Poland;3. Department of Analytical Chemistry, Ivan Franko National University of Lviv, Kyryla and Mephodiya 6, 79005 Lviv, Ukraine;1. Institut für Geowissenschaften, Goethe-Univerität, Altenhöferallee 1, 60438 Frankfurt am Main, Germany;2. Institut für Kristallographie, RWTH Aachen, Jägerstraße 17-19, 52066 Aachen, Germany;1. Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland;2. Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa;1. University of California, Irvine, California 92697-4574, USA;2. Instituto de Física “Gleb Wataghin”, UNICAMP, Campinas, SP 13083-859, Brazil |
| |
| Abstract: | The transport properties of manganese-oxides are studied using the spin correlation fluctuation scattering mechanism. It is shown that the Hall resistivity in a small magnetic field exhibits a maximum near the Curie point, and a strong field shifts the peak position to high temperature and suppresses the peak value; the dependence of the Hall resistivity on the magnetic field above Tc and below Tc is different. These results agree with the experimental curves qualitatively, but disagree quantitatively, which indicates that the spin correlation fluctuation scattering might not be the dominant mechanism of the colossal magnetoresistance. The double polaron mechanism due to strong electron-phonon and electron-spin coupling is proposed to be responsible for the colossal magnetoresistance in manganese-oxides. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
