Mahanta , Tushar Prava (2013) Structural, dielectric and optical studies of Co doped Bi2Fe4O9. MSc thesis.
The crystal structure, surface morphology, dielectric and optical properties of Bi2Fe4O9 and 20% Co-doped Bi2Fe4O9 is analysed and compared. Bi2Fe4O9 and Bi2Fe3CoO9 were prepared by solid state reaction route at 850 ºC. Using X- ray diffraction technique, lattice parameters of Bi2Fe4O9 are found to be a= 7.96 Å, b= 9.12 Å, and c= 5.26 Å which is in agreement with previous reports. A comparison of SEM pictures depicts more porosity in Bi2Fe3CoO9 as comparison to Bi2Fe4O9. UV visible spectroscopy confirms the increased band gap in Bi2Fe3CoO9 as comparison to Bi2Fe4O9. For a particular frequency and temperature dielectric constant of Bi2Fe3CoO9 is less than Bi2Fe4O9.
|Item Type:||Thesis ( MSc)|
|Uncontrolled Keywords:||Multiferroic; Magnetoelectric coupling; Pentagon symmetry; Spin frustration|
|Subjects:||Physics > Condensed Matter|
|Divisions:||Sciences > Department of Physics|
|Deposited By:||Hemanta Biswal|
|Deposited On:||12 Dec 2013 09:49|
|Last Modified:||20 Dec 2013 15:40|
|Supervisor(s):||Singh , A K|
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