Sen K.1*, Singh K.2, Gautam A.3, Singh M.4
1Department of Physics Himachal Pradesh University, Shimla-5
2Department of Physics Himachal Pradesh University, Shimla-5
3Department of Physics Himachal Pradesh University, Shimla-5
4Department of Physics Himachal Pradesh University, Shimla-5
* Corresponding Author : sen.728@gmail.com
Received : - Accepted : - Published : 15-06-2010
Volume : 1 Issue : 1 Pages : 22 - 30
Nanotechnol Nanosci 1.1 (2010):22-30
Conflict of Interest : None declared
Acknowledgements/Funding : The authors wish to thank S.K.Sharma
at Brazil for studying magnetic
properties. Research facilities provided
by Deptt.Of Physics H.P.University
Shimla & SAIF Chandigarh are highly
acknowledged
Multiferroic have been known as materials exhibiting both ferroelectric and ferromagnetic properties in same phase, they have interesting physical properties as well as possibility of practical application in some new memories, spintronics and sensor devices. One of the interesting multiferroic material is BiFeO3 which is the only known material exhibiting good ferroelectromagnetism and room temperature, because it has a high Curie temperature (TC ~ 8300C) and a high Neel temperature (TN ~ 3700C).BiFeO3 ceramic have a rhombohedrally distorted perovskites like structure corresponding to space group R3c. Structural, dielectric, ferroelectric and ferromagnetic properties of multiferroic BiCoxFe1-xO3 (x=0.0, 0.05, 0.10, 0.15, 0.20, 0.25) ceramic were studied by solution combustion method and prepared samples were characterized by X-Ray Diffraction (XRD), Transmission Election Microscopy (TEM) and Differential Scanning Calorimetry (DSC). Improved resistivity of ~1010 ohm-cm were formed by sintering the 4000C, 6000C, 7000C calcined powder at 7500C for 60 min and also there is an improvement in M-H hysteresis loop with cobalt substitution. Room temperature ferromagnetic ordering at nano level is new and intereting on physics and technological point of view in this system.
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