Formation of Fe and Ni substituted LiMn2–XMXO4 nanopowders and their crystal and electronic structure and magnetic properties-Reference-Cited by-同舟云学术

Formation of Fe and Ni substituted LiMn2–XMXO4 nanopowders and their crystal and electronic structure and magnetic properties

Published:2017-03-01 Issue:1 Volume:35 Page:159-172
ISSN:2083-134X
Container-title:Materials Science-Poland
language:en
Short-container-title:

Author:

Talik E.¹,Lipińska L.²,Guzik A.¹,Zajdel P.¹,Michalska M.²,Szubka M.¹,Kądziołka-Gaweł M.¹,Paul R.L.³

Affiliation:

1. Institute of Physics , University of Silesia , Uniwersytecka 4, 40-007 Katowice , Poland

2. Institute of Electronic Materials Technology , Wólczyńska 133, 01-919 Warszawa , Poland

3. Analytical Chemistry Division, National Institute of Standards and Technology , Gaithersburg , MD 20899 , USA

Abstract

Abstract The Pechini sol-gel method was applied to obtain LiMn2–xTxO4 (T = Ni, Fe; x = 0.1 to 0.5) nanopowders. Crystal and electronic structures, chemical composition and magnetic properties of the materials were characterized by X-ray diffraction, XPS, SEM/EDX microscopy, prompt gamma-ray activation analysis (PGAA), Mössbauer spectroscopy and magnetic susceptibility, respectively. XRD measurements showed that the LiMn2–xNixO4 were single phase for x = 0.1 and 0.2. Three samples with higher Ni content contained some addition of a second phase. Analysis of the oxidation state of the dopants by XPS revealed ionic Ni2+ and Fe3+. Mössbauer spectroscopy also confirmed 3+ oxidation state of iron and its location in octahedral sites, which excluded the inverse spinel configuration. XPS examinations showed that Mn3+ ions dominated in the iron substituted series whereas the Mn4+ was dominant in the nickel series.

Publisher

Walter de Gruyter GmbH

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

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