在YBaCuFeO5-Ni0.3Zn0.7Fe2O4复合材料中异常的零场冷却交换偏差和相关机制
A K Sahoo1, Anupama Pati1, Sujata Kumari Ray1
1Department of Physics and Astronomy, National Institute of Technology Rourkela, Odisha 769008, India.
The Journal of chemical physics
|March 17, 2025
概括
研究人员在新型复合材料中实现了大约1kOe的巨型室温交换偏差. 对抗铁磁性YBaCuFeO5-铁磁性Ni0.3Zn0.7Fe2O4的这一发现为高效的设备制造提供了潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 磁力学 磁力学 是一种
背景情况:
- 交换偏差是spintronic设备中的一个关键现象,通常在低温下观察到.
- 抗铁磁/铁磁异构结构是磁性内存和传感器的关键组件.
- 控制界面磁性属性对于先进的磁性应用是必不可少的.
研究的目的:
- 为了研究YBaCuFeO5和Ni0.3Zn0.7Fe2O4.4复合物的室温交换偏差.
- 了解费里特度对磁转换和界面性质的影响.
- 探索这种复合材料在实际设备应用中的潜力.
主要方法:
- 固态合成路径用于制备 (100-x) YBaCuFeO5-(x) Ni0.3Zn0.7Fe2O4复合物,其中x=1,3,5重量%.
- 磁性测量,包括磁化异热和温度依赖性研究.
- 对界面应变,粒度边界和磁相过渡的分析.
主要成果:
- 在室温下达到1kOe的巨大的零场冷却交换偏差.
- 观察到YBaCuFeO5的磁过渡温度 (TN2) 的变化,随着费里特度的增加.
- 证明了负交换偏差现象,归因于未补偿的旋转和界面相互作用.
- 报告了交换偏差场和强制场与温度和度之间的相反关系.
结论:
- 复合材料具有显著的室温交换偏差,可能对设备应用有用.
- 接口特性和磁相转换在观察到的交换偏差中起着至关重要的作用.
- 在YBaCuFeO5中稀释法里特相的结合可以在室温下产生显著的磁效应.
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