کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8002928 | 1516316 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Versatile electronic behavior of the LixMn3âxâyFeyO4 spinels
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 577, 15 November 2013, Pages 269-277
Journal: Journal of Alloys and Compounds - Volume 577, 15 November 2013, Pages 269-277
نویسندگان
D. Alonso-DomÃnguez, I. Álvarez-Serrano, M.L. López, M.L. Veiga, C. Pico, F. Mompeán, M. GarcÃa-Hernández, G.J. Cuello,