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https://doi.org/10.1063/1.1454207
DC Field | Value | |
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dc.title | Effect of Cu doping on the magnetoresistive behavior of double perovskite Sr 2FeMoO 6 polycrystals | |
dc.contributor.author | Yuan, C.L. | |
dc.contributor.author | Zhu, Y. | |
dc.contributor.author | Ong, P.P. | |
dc.date.accessioned | 2014-10-16T09:21:50Z | |
dc.date.available | 2014-10-16T09:21:50Z | |
dc.date.issued | 2002-04-01 | |
dc.identifier.citation | Yuan, C.L., Zhu, Y., Ong, P.P. (2002-04-01). Effect of Cu doping on the magnetoresistive behavior of double perovskite Sr 2FeMoO 6 polycrystals. Journal of Applied Physics 91 (7) : 4421-4425. ScholarBank@NUS Repository. https://doi.org/10.1063/1.1454207 | |
dc.identifier.issn | 00218979 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/96301 | |
dc.description.abstract | The electrical, magnetic, and transport properties of Cu-doped polycrystalline samples Sr 2Fe 1-xCu xMoO 6 with ordered double perovskite structure have been investigated systematically. Analysis of the x-ray powder diffraction pattern based on the Rietveld analysis indicates that the substitution of Fe 3+ ions by Cu 2+ ions enhances the site location order of Fe, Cu, and Mo on the B site for the high-doping-level samples (x=0.20,0.25,0.30). With increasing doping level, a transition from semiconductor to metal behavior was also found to occur. Furthermore, the transition temperature was found to decrease either by the application of a magnetic field or by increasing the doping level. It can be concluded that the existence of Cu 2+ ions induces the occurrence of Fe 3+δ ions and the double exchange interaction in Fe 3+-O-Mo-O-Fe 3+δ. The transport mechanism in these samples can be attributed to the competition between the metal phase and the semiconductor phase arising from the doping of Cu 2+ ions. Both the semiconductor-to-metal transition and the magnetoresistive behavior can be explained by the percolation threshold model. © 2002 American Institute of Physics. © 2002 American Institute of Physics. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1063/1.1454207 | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | PHYSICS | |
dc.description.doi | 10.1063/1.1454207 | |
dc.description.sourcetitle | Journal of Applied Physics | |
dc.description.volume | 91 | |
dc.description.issue | 7 | |
dc.description.page | 4421-4425 | |
dc.description.coden | JAPIA | |
dc.identifier.isiut | 000174663900071 | |
Appears in Collections: | Staff Publications |
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