Versatile electronic behavior of the LixMn3-x-yFeyO4 spinels

被引：1
作者：
Alonso-Dominguez, D. [1 ,2 ]
Alvarez-Serrano, I. [1 ]
Lopez, M. L. [1 ]
Veiga, M. L. [1 ]
Pico, C. [1 ]
Mompean, F. [3 ]
Garcia-Hernandez, M. [3 ]
Cuello, G. J. [4 ]
机构：
[1] Univ Complutense Madrid, Fac Ciencias Quim, Dept Quim Inorgan, E-28040 Madrid, Spain
[2] UCM UPM, CEI Moncloa, Madrid, Spain
[3] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain
[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 577卷
关键词：
Ferrites; Neutron diffraction; Magnetocaloric effect; Dielectric behavior; Li cathodes; Spinel; MAGNETIC-PROPERTIES; FERRITES;
D O I：
10.1016/j.jallcom.2013.05.043
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The detailed structural and electronic characterization of microcrystalline powders of new spinels Lix-Mn3-x-yFeyO4 (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 Xray diffraction showing a cubic symmetry between 5 and 550 K, Space Group Fd (3) over barm. 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. (C) 2013 Elsevier B.V. All rights
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页码：269 / 277
页数：9
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