Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8002928 | Journal of Alloys and Compounds | 2013 | 9 Pages |
Abstract
The detailed structural and electronic characterization of microcrystalline powders of new spinels LixMn3âxâyFeyO4 (0.4 ⩽ x ⩽ 1.33; 0 ⩽ y ⩽ 1.30), obtained by the “liquid mix” method, is reported. Compositional characterization was carried out by means of thermogravimetric analysis, energy-dispersive X-ray spectroscopy and electron energy loss spectroscopy, and their structure was refined from neutron and X-ray diffraction showing a cubic symmetry between 5 and 550 K, Space Group Fd3¯m. However, at temperatures above ca. 950 K, a reversible transformation, probably implying the formation of an ordered vacant phase, has been detected. The magnetic behavior, analyzed from neutron diffraction data and magnetization measurements, is interpreted considering an “incomplete” ferrimagnetic response, due to magnetic frustration in the B sites. Potential applications have been evaluated from the magnetocaloric, electrochemical and dielectric behavior in selected compositional ranges.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
D. Alonso-DomÃnguez, I. Álvarez-Serrano, M.L. López, M.L. Veiga, C. Pico, F. Mompeán, M. GarcÃa-Hernández, G.J. Cuello,