Disclosing the origin of the reduced magnetoresistance in electron-doped double perovskites
Electron doping in A2-xLxFeMoO6 (where L is a trivalent lanthanide and A is a divalent cation) double perovskites has been established as a suitable technique for increasing their Curie temperature. However, it was found that the magnetoresistance gradually decreases with increasing lanthanide subst...
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| Veröffentlicht in: | Journal of physics. Condensed matter 2006-08, Vol.18 (34), p.7991-7998 |
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| container_title | Journal of physics. Condensed matter |
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| creator | Rubi, D Fontcuberta, J |
| description | Electron doping in A2-xLxFeMoO6 (where L is a trivalent lanthanide and A is a divalent cation) double perovskites has been established as a suitable technique for increasing their Curie temperature. However, it was found that the magnetoresistance gradually decreases with increasing lanthanide substitution. Here we analyse in detail the magnetoresistance as a function of the magnetic field for several series of ceramic A2-xLxFeMoO6 oxides, showing that the data can be well described by assuming a gradual loss of spin polarization of the conduction band upon electron doping. This observation introduces some constraints to models of ferromagnetic coupling in double perovskites. |
| doi_str_mv | 10.1088/0953-8984/18/34/011 |
| format | Article |
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| ispartof | Journal of physics. Condensed matter, 2006-08, Vol.18 (34), p.7991-7998 |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic transport in condensed matter Exact sciences and technology Physics Spin polarized transport |
| title | Disclosing the origin of the reduced magnetoresistance in electron-doped double perovskites |
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