the mössbauer spectra of nanoferrite materials such as ni0.25mn0.75fe2o4, co0.5mn0.5fe2o4 and ni0.4co0.6fe2o4 have been reported and the above materials were prepared by sol-gel combustion method using metal nitrates as source material and polyvinyl alcohol(pva) as agglomeration reducing agent. as the structural, thermal and magnetic properties (vsm) of the above ferrites have been published al...

The Mössbauer spectra of nanoferrite materials such as Ni0.25Mn0.75Fe2O4, Co0.5Mn0.5Fe2O4 and Ni0.4Co0.6Fe2O4 have been reported and the above materials were prepared by sol-gel combustion method using metal nitrates as source material and Polyvinyl alcohol(PVA) as...

The Mössbauer spectra of nanoferrite materials such as Ni0.25Mn0.75Fe2O4, Co0.5Mn0.5Fe2O4 and Ni0.4Co0.6Fe2O4 have been reported and the above materials were prepared by sol-gel combustion method using metal nitrates as source material and Polyvinyl alcohol(PVA) as...

The isomer shift for the 23.87 keV M1 resonant transition in the (119)Sn nucleus is calibrated with the help of ab initio calculations. The calibration constant alpha((119)Sn) obtained from Hartree-Fock (HF) calculations (alpha(HF)((119)Sn) = (0.081+/-0.002)a(0)(-3) mm/s) and from second-order Moller-Plesset (MP2) calculations (alpha(MP2)((119)Sn) = (0.091+/-0.002)a(0)(-3) mm/s) are in good agr...

Using linear response approach to the Mössbauer isomer shift, the calibration constant alpha((57)Fe) was obtained from high level ab initio calculations carried out for a representative set of iron compounds. The importance of the effects of relativity and electron correlation for an accurate description of the (57)Fe isomer shift is demonstrated on the basis of the Hartree-Fock, coupled cluste...

The central shift of 57Fe atoms with trapped interstitials (mixed dumbbells) in aluminium increases steeply at temperatures between 10 and 20 K. Influences of restricted diffusion of the Mossbauer atom in a cage on the isomer shift and second order Doppler shift are discussed.