Wednesday, June 19, 2013

1306.4214 (Anju Ahlawat et al.)

Modification in structural, dielectric and magnetic properties of La and
Nd co-substituted epitaxial BiFeO3 thin films

Anju Ahlawat, S. Satapathy, V. G. Sathe, R. J. Choudhary, M. K. Singh, Ravi Kumar, T. K. Sharma, P. K. Gupta
The influence of La and Nd co-substitution on the structural and magnetic properties of BiFeO3 (BFO) thin films was examined. Epitaxial thin films of pure and, La and Nd co-doped BFO on the SrRuO3 buffered single crystal SrTiO3 (001) substrate were deposited using pulsed laser deposition. The structural change in co doped La and Nd BFO thin films which was caused by the changes of force constant in the crystal lattice induced by ionic radii mismatch was investigated. Raman spectroscopy studies manifest the structural change in doped BFO films from rhombohedral to monoclinic distorted phase which is induced by the co substitution of La and Nd. Room temperature magnetic hysteresis curves indicated that saturation magnetization is enhanced in the doped film with saturation magnetization of ~20 emu/cm3. The dielectric and magnetic properties are effectively improved in BLNFO films compared to pure BFO thin films.
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