| Full text | |
| Author(s): |
von Dreifus, Driele
[1, 2]
;
Pereira, Rodrigo
[3]
;
Rodrigues, Ariano D.
[2]
;
Pereira, Ernesto C.
[1]
;
de Oliveira, Adilson J. A.
[2]
Total Authors: 5
|
| Affiliation: | [1] Univ Fed Sao Carlos UFSCar, Dept Quim, Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos UFSCar, Dept Fis, Sao Carlos, SP - Brazil
[3] Inst Fed Educ Ciencia & Tecnol Mato Grosso IFMT, Sao Vicente, MT - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | CERAMICS INTERNATIONAL; v. 44, n. 16, p. 19397-19401, NOV 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
In this paper, a new chemical route synthesis for gamma-CoV2O6 is proposed. Based on the CoO-V2O5 phase diagram a study of temperature and calcination times for pure gamma-CoV2O6 obtainment is described. X-ray diffraction and Raman spectroscopy experiments revealed the triclinic crystals structure belonging to P-1 spatial group. FEG-SEM images showed that the resulting grains present elongated shape. Rietveld analysis revealed a crystalline anisotropy with preferential crystallographic orientation in the {[}2 0 - 1] and {[}1 3 0] planes. The calculated mean crystallite size evidences that the crystallite dimensions are significantly different in the parallel and perpendicular directions. The magnetic properties measurements evidenced an antiferromagnetic transition at 7 K and a detailed view of the magnetization isotherms confirmed a noticeable step-like behavior below T-N, characteristic of field-induced transitions. (AU) | |
| FAPESP's process: | 09/54082-2 - Emu: projeto para aquisicao de um magnetometro de amostra vibrante que utiliza como sensor um dispositivo supercondutor de interferencia quantica acoplado (squid-vsm) com circuito fechado de criogenia |
| Grantee: | Ernesto Chaves Pereira de Souza |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |