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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects of microstructure on the magnetic properties of polycrystalline NiMn2O4 spinel oxides

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Author(s):
Freitas Cabral, A. J. [1] ; Remedios, C. M. R. [2] ; Gratens, X. [3] ; Chitta, V. A. [3]
Total Authors: 4
Affiliation:
[1] Univ Fed Oeste Para, Santarem, PA - Brazil
[2] Univ Fed Para, Inst Ciencias Exatas & Nat, Belem, Para - Brazil
[3] Univ Sao Paulo, Inst Fis, Sao Paulo, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Magnetism and Magnetic Materials; v. 469, p. 108-112, JAN 1 2019.
Web of Science Citations: 1
Abstract

Polycrystalline NiMn2O4 samples were synthesized by sol-gel method at 500 degrees C (S500), 700 degrees C (S700), and 800 degrees C (S800). The three samples were then structurally characterized by X-ray diffraction and Rietveld refinement. Results indicate that samples are single phase and crystallize in the Fd (3) over barm space group with spinel structure. Williamson-Hall analysis shows that samples present different lattice strains. NiMn2O4 compounds show the magnetic transition from ferrimagnetic to paramagnetic at nearly 100 K. Hysteresis loops measured at T = 1.7 K after cooling the samples under magnetic field are asymmetric along the field axis. (AU)

FAPESP's process: 15/16191-5 - The research in new materials involving high magnetic fields and low temperatures
Grantee:Gennady Gusev
Support type: Research Projects - Thematic Grants