Structural, magnetic and electrical transport properties of Co doping in LaKFeMoO6 double perovskite
| Autor: | Minghui Ren, Fengrui Liu, Guoyan Huo, Na Lü |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Materials science Condensed matter physics Magnetoresistance Doping Crystal structure Atmospheric temperature range Condensed Matter Physics Variable-range hopping Electronic Optical and Magnetic Materials Crystallography chemistry X-ray crystallography Inorganic compound Monoclinic crystal system |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 323:799-804 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2010.10.047 |
| Popis: | The structural, magnetic and transport properties of La 1+ x K 1− x Fe 1− y Co y MoO 6 (0.0≤ x ≤0.1 and 0.1≤ y ≤0.2) series are studied. At room temperature, the crystal structure is a monoclinic system with space group P 2 1 / n . The antisite defect lowers with Co doping in LaKFe 1− y Co y MoO 6 series. However, it increases with the substitution of K by La. Magnetizations increase with the increase in Co content ( x =0) and with the La substitution for K, respectively. All compounds demonstrate semiconducting behavior. Their electrical resistivities increase with Co content for LaKFe 1− y Co y MoO 6 and also increase with La for La 1+ x K 1− x Fe 1− y Co y MoO 6 . For the LaKFe 1− y Co y MoO 6 the electrical transport behavior can be described by Mott variable range hopping model in the studied temperature range, whereas for the La 1+ x K 1− x Fe 1− y Co y MoO 6 ( x ≠0 and y ≠0) the electrical transport behavior follows the Mott and ES variable range hopping model in high and low temperature ranges, respectively. Each sample exhibits a large magnetoresistance effect. |
| Databáze: | OpenAIRE |
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