Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8153962 | Journal of Magnetism and Magnetic Materials | 2018 | 29 Pages |
Abstract
Mixed Co2Mn1âxBixO4 (xâ¯=â¯0, xâ¯=â¯0.05 and xâ¯=â¯0.1) samples were prepared by the sol-gel method using the citric acid route and characterized by various techniques. The X-ray diffraction (XRD) and Raman spectroscopic analyses confirmed the formation of inverse spinel cubic structure with Fd3â¾m space group. The introduction of Bismuth (Bi) into Co2MnO4 did not modify the ferrimagnetic character of the parent compound Co2MnO4, whereas the field-cooled magnetizations MFC and the Curie temperature Tc decreased when increasing the Bi content. The electrical properties showed an activation energy (Ea) increase caused by the decrease of the double-exchange interaction following the substitution of Mn3+ by Bi3+. Eventually, the temperature coefficient of resistance (TCR) shows significant values for all samples can be investigated also as good candidates for bolometer applications.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
H. Chouaya, M. Smari, I. Walha, E. Dhahri, M.P.F. Graça, M.A. Valente,