Intergrain magnetoresistance in electron-doped Sr/sub 2/FeMoO/sub 6
| Autor: | J. M. D. Coey, U. V. Varadaraju, Munuswamy Venkatesan, C. B. Fitzgerald |
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| Rok vydání: | 2002 |
| Předmět: |
Materials science
Magnetoresistance Analytical chemistry Molybdate Grain size Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Ferromagnetism Electrical resistivity and conductivity X-ray crystallography Curie temperature Electrical and Electronic Engineering Quantum tunnelling |
| Zdroj: | IEEE Transactions on Magnetics. 38:2901-2903 |
| ISSN: | 0018-9464 |
| DOI: | 10.1109/tmag.2002.803138 |
| Popis: | Electron-doped double perovskite compounds (Sr/sub 2-x/La/sub x/)FeMoO/sub 6/ (x=0.0, 0.5, 0.7) were synthesized by combustion synthesis using oxalic acid dihydrazide as fuel. There is an increase in Curie temperature (T/sub C/) with La substitution up to a value of 172/spl deg/C for (Sr/sub 1.3/La/sub 0.7/)FeMoO/sub 6/. The compound (Sr/sub 1.5/La/sub 0.5/)FeMoO/sub 6/ with increased T/sub C/ compared to the undoped sample, exhibits a intergrain magnetoresistance of about 3% in a field of 0.1 T. The presence of magnetoresistance in La-doped samples prepared by combustion synthesis is due to the increased number of intergrain tunnel barriers. |
| Databáze: | OpenAIRE |
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