Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8948546 | Journal of the European Ceramic Society | 2018 | 25 Pages |
Abstract
The transparent semiconductor Zn2SnO4 with cubic spinel structure and the isostructural Zn2TiO4 have been magnetically doped with Co2+. ZnCoSnO4 and ZnCoTiO4 exhibit ferrimagnetism below TN â 13âK and TN â 17âK. Ferrimagnetic moments are evident in M vs H curves below TN by small hysteresis. Fits to strictly linear Curie-Weiss plots above TN give μeff â 4.86 μB and â4.91 μB for ZnCoSnO4 and ZnCoTiO4, above theoretical predictions. Impedance spectroscopy data from sintered ceramic can be fitted with a standard equivalent circuit model based on two RC elements for bulk and GB areas. The relative dielectric permittivity of the bulk is â20 and â30 for Zn2SnO4 and Zn2TiO4. The semiconducting ZnCoSnO4 and ZnCoTiO4ceramics exhibit bulk resistivity of â1 106âΩâcm and â1 105âΩâcm at 560âK (287â°C), and bulk activation energies of EA â 1.2âeV and 1.1âeV.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Domingo Ruiz-León, Federico Mompean, Jesús Prado-Gonjal, José F. Marco, Mar GarcÃa-Hernandez, Rainer Schmidt,