No abstract

Study of Substitution Limit, Structural, Bulk Magnetic and Electrical Properties of Ca 2+ Substituted Magnesium Ferrite. -The Mg1-xCaxFe2O4 (x = 0.0-0.35) spinel system is investigated by XRD, magnetization, ac susceptibility, and dc resistivity measurements. Up to 23% Mg can be substituted by Ca in the fcc MgFe2O4 spinel structure. The variation of the magneton number as a function of Ca content follows the Neel's collinear spin model. The determined Neel temperatures are in agreement with those calculated using the cation distribution. -(CHHAYA, S. D.; PANDYA, M. P.; CHHANTBAR, M. C.; MODI*, K. B.; BALDHA, G. J.; JOSHI, H. H.; J. Alloys Compd. 377 (2004) 1-2, 155-161; Dep. Phys., Saurashtra Univ., Rajkot 360 005, India; Eng.) -Schramke 48-014