在SrCoO3中引入梯度和氧缺陷,以调节结构,电和磁传输特性
Hongyuan Song1, Xuesong Wang1, Haorong Wu1
1Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, PR China. yulan000@hotmail.com.
Dalton transactions (Cambridge, England : 2003)
|January 16, 2024
概括
在合金氧化物 (SrCoO3-δ) 中的兴奋剂引入氧缺陷,调整电磁性质. 这项研究揭示了一个新的室温铁磁相,具有增强的磁化.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 氧化 (SrCoO3-δ) 呈现出多样化的晶体结构和可调节的电磁性质.
- 控制SrCoO3-δ中的氧缺陷对于优化其性能至关重要,但由于其复杂的结构,仍然具有挑战性.
研究的目的:
- 研究 (Er) 兴奋剂对SrCoO3-δ.的结构,电和磁传输特性的影响.
- 通过Er doping引入和控制氧缺陷,以调节材料特性.
主要方法:
- 通过Er doping合成Sr1-xErxCoO3-δ (x = 0-0.25) 的方法.
- 结构和氧含量分析采用度定位.
- 测量电电阻和磁性 (磁化,库里温度).
主要成果:
- 结构演变从六角到立方矿,最后到有序的四角阶段,含量增加.
- 立方矿相 (Sr0.9Er0.1CoO2.689) 由于高对称性和轨道重叠,显示出最低的电阻 (4.06 mΩ cm).
- 转换为室温铁磁相 (Sr0.8Er0.2CoO2.635,Tc ~330 K) 增强磁化 (4.66 μB/Co) 归因于旋转状态变化和缺氧层.
结论:
- doping有效地引入氧气缺陷,并调节SrCoO3-δ的晶体结构,电和磁性.
- 顺序四角形相表现出有希望的室温铁磁性和强磁化,为先进的磁性应用提供了潜力.
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