BARC/PUB/2013/0246

 
 

Temperature dependent neutron diffraction and Mossbauer studies in zinc ferrite nanoparticles

 
     
 
Author(s)

Thomas, J. J.; Shinde, A. B.; Krishna, P. S. R.; Kalarikkal, N.
(SSPD)

Source

Materials Research Bulletin, 2013. Vol. 48 (4): pp. 1506-1511

ABSTRACT

The micro-level magnetic alignments of zinc ferrite nanoparticles synthesized by sol–gel method were investigated using magnetization study, neutron diffraction and Mo¨ssbauer spectroscopy. Magnetization behavior of the sample clearly indicates the presence of superparamagnetism. The neutron diffraction was performed at seven different temperatures between 6 K and 300 K. The cation distribution is found to have a variation from the from normal spinel structure. Both A and B site magnetic moment values found to vary with temperature which is found to correlates with variations in bond lengths and lattice constants. The Mo¨ ssbauer spectrum at room temperature shows typical doublet while the spectrum 5 K shows well defined sextet. The two sub-spectra in the sextet resolves well by the application of 5 T magnetic field and the noncollinear nature of magnetic alignment with in the tetrahedral and octahedral sites of zinc ferrite are deduced.

 
 
SIRD Digital E-Sangrahay