期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 32, 期 12, 页码 15740-15753出版社
SPRINGER
DOI: 10.1007/s10854-021-06125-9
关键词
-
类别
资金
- Adana Alparslan Turke Science and Technology University (Adana/Turkey) Scientific Research Coordination Unit [19332004]
The study investigated the structural, magnetic, and magnetocaloric properties of Ho-substituted Co(CrFe)O-4 spinel compounds, finding that the Ho3+ ions form a new phase in the lattice and affect the paramagnetic to ferro-/ferrimagnetic phase transition temperature and magnetic entropy change. The average particle size of samples also increases with Ho content.
In this study, structural, magnetic and magnetocaloric properties of Ho-substituted Co(CrFe)O-4 spinel compounds produced by the sol-gel method were investigated. The Ho concentration in Co(CrFe)O-4 spinel structure was changed from 0 to 20% by 5% steps. It is observed that the Ho3+ ions create a new phase HoCrO3/HoFeO3 in the host spinel lattice. SEM images of samples indicate that the average particle size increases with Ho content. The paramagnetic to ferro-/ferrimagnetic phase transition temperature increases from 312 to 344 K with Ho content. While the fluctuation in saturation magnetization of samples was detected at low temperature, it almost becomes a linear change with the Ho content. The maximum magnetic entropy change under 7 T magnetic field was found as - 1.39, - 1.50, - 1.20, - 0.98 and - 0.91 J/kgK for Ho-free, 5, 10, 15 and 20 wt% Ho content in CoCrFeO4 spinel structure, respectively.
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