Spin glass behaviour in the Co2−xZnxTiO4 compound

The effects of acetyl shikonin isolated from Onosma armeniacum on oxidative stress in ethanol-induced ulcer model of rats

“…This explains the reduction of the positive thermoelectric power with increasing ferric concentrations. The decrease of the hole hopping with increasing iron concentrations had previously been studied in [1], confirming the behavior of our results.…”

“…Compositions of the Li 0.5 F e x Ga 2.5−x O 4 system for x = 0, 0.25, 0.5, 0.75, 1 were prepared by the general ceramic method [1][2][3]. High purity Li 2 CO 3 and Fe 2 O 3 powders were mixed in proper stoichiometric proportions and well-milled.…”

“…Here, one can see that the electrical conductivity increased with Fe concentration. The n-type conduction is due to electron hopping between Fe 3+ and Fe 2+ ions as F e 3+ + e ←→ F e 2+ , and the presence of Ga 3+ on the octahedral sites [1] favors the p-type conduction mechanism due to hole transfer from Ga 3+ to Ga 2+ ions as…”

“…As ferrites have electrical and magnetic properties that have application in various applied communications technology, we have carried out a study of the structural and electrical properties of the Li 0.5 F e x Ga 2.5−x O 4 system [1]. Calculations from x-ray diffraction measurements indicated that Li 1+ occupy only octahedral sites and Ga 3+ and Fe 3+ ions occupy both octahedral and tetrahedral sites.…”