期刊
PHILOSOPHICAL MAGAZINE
卷 98, 期 26, 页码 2425-2439出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2018.1490036
关键词
alpha-Fe2O3; NiFe2O4; oxide nanomaterials; inorganic materials
类别
资金
- Council of Scientific and Industrial Research (CSIR)
- Ministry of Education, Youth and Sports of the Czech Republic [LO1305]
We report the synthesis of pristine and nickel containing iron oxide (-Fe2O3) nanocrystallites by facile environmentally benign wet chemical process. The magnetic behaviour of the samples has been found to change progressively with nickel content. The Mossbauer spectra revealed the precipitation of secondary phase of nickel ferrite (NiFe2O4) at approximate to 2wt% nickel contents. The transmission electron micrographs together with asymmetric magnetic hysteresis loop have confirmed the formation of core-shell structure. The Morin temperature of nanostructured -Fe2O3 as estimated by superconducting quantum interference device has been found to be 257, 245, 247 and 242K at nickel content of 0, 1, 2 and 4wt%, respectively. The similar trends of increase/decrease in Morin temperature have been noticed by Mossbauer analysis. Furthermore, below Morin temperature, the temperature range of coexisted antiferromagnetic and ferromagnetic states has been found to increase with increase in nickel content.
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