Please use this identifier to cite or link to this item:
|Title:||Effect of Cu doping on the magnetoresistive behavior of double perovskite Sr 2FeMoO 6 polycrystals|
|Authors:||Yuan, C.L. |
|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|
|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.|
|Source Title:||Journal of Applied Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Oct 17, 2018
WEB OF SCIENCETM
checked on Oct 10, 2018
checked on Oct 12, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.