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Author  |
Zapata, C.; Nieva, G.; Ferreyra, J.M.; Villafuerte, M.; Lanoël, L.; Bridoux, G. | ||||
| Title | The s-d exchange model as the underlying mechanism of magnetoresistance in ZnO doped with alkali metals | Type | Journal Article | ||
| Year | 2019 | Publication | Journal of Physics: Condensed Matter | Abbreviated Journal | Journal of Physics: Condensed Matter |
| Volume | 31 | Issue | 34 | Pages | 345801 |
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| Abstract | High field magnetoresistance has been studied in epitaxial n-type ZnO:Na and ZnO:Li thin films in a temperature range between 4 K and 150 K. The resulting negative magnetoresistance can be well fitted using a semiempirical model of Khosla and Fischer based on third order contributions to the s-d exchange Hamiltonian. The parameters obtained from this model were carefully analyzed. One of these parameters is related to a ratio between electron mobilities at zero field (a non-exchange scattering mobility and an exchange or spin dependent one ). From Hall effect measurements was obtained, displaying a weak temperature dependence in accordance with highly n-doped ZnO while the extracted exhibits an anomalous T-dependence. On the other hand, our magnetoresistance data cannot be properly fitted using Kawabata’s expression based on a weak-localization model. | ||||
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| Corporate Author | Thesis | ||||
| Publisher | IOP Publishing | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1361-648x | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | BT @ gnieva @ | Serial | 848 | ||
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