期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 206, 期 -, 页码 69-78出版社
ELSEVIER
DOI: 10.1016/j.mseb.2016.01.002
关键词
Ferrite nanoparticles; Structural parameters; Raman spectroscopy; Mossbauer spectroscopy; X-ray photoelectron spectroscopy
资金
- Indian Institute of Technology Delhi, New Delhi, India
In this paper we report the structural, vibration, and electronic-structure parameters (bonding and valence of cations) of single phase cubic mixed spinel nanoparticles of (Zn delta Mn gamma Fe1-(gamma+delta))[NixZn0.5-delta Mn0.5-gamma-chi Fe1+(gamma+delta)]O-4 where x=0.05-0.45 with an aim to determine cation-distribution i.e. delta and gamma in these samples. The Raman spectroscopy has established that only Fe and Zn cations occupy tetrahedral interstitial sites in a FCC anion lattice in nearly equal fraction, and Mossbauer spectra have shown that Fe3+ cations are present at both, tetrahedral and octahedral interstitial sites and Ni2+ cations are situated at the octahedral sites in all the substituted samples. The photoelectron spectra also revealed the presence of Fe3+ cations at both the interstitial sites. The best possible cationic distribution in Ni substituted Mn-Zn ferrites has been estimated by reiteratively calculating the intensity ratios of various pairs of X-ray diffraction peaks and matching with the observed intensity ratios. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据