Institution: | a Department of Physics, Saurashtra University, Kalawad Road, Rajkot 360 005, India b Inter University Consortium for DAE. Facilities, Mumbai Centre, BARC Campus, Mumbai 400 085, India c Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India |
Abstract: | The spinel oxide system ZnzTizFe2?x?zCrx?zCoO4; z=x2; x=0.60, 0.65, 0.70 and 0.80, was studied using neutron diffraction technique, low field DC magnetization measurements (ZFC–FC measurements), magnetic hysterisis, Mössbauer spectroscopy and low field AC susceptibility measurements. All the compositions show significantly less B-site magnetic moments at 10 K temperature derived from neutron diffraction data than the free ions site moments deduced assuming collinear arrangement of spins. This combined with some other features seen in the low temperature neutron diffraction patterns suggest localized canting of spins (LCS) type of magnetic ordering in the present system where a long range order of longitudinal component of moments co-exists along with totally disordered transverse component of moments. The conclusion is also supported by the features seen in the other measurements. The magnetic moments derived from 10 K neutron diffraction data are explained using the LCS approach for different exchange integrals ratios. |