在混合的质子和氧空隙中溶解的铁磁绝缘基态 - - 通过离子液体化层通过薄膜添加La0.67Sr0.33CoO3
1Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, and Department of Physics, Xiamen University, Xiamen 361005, P.R. China.
ACS applied materials & interfaces
|April 16, 2024
概括
研究人员使用离子液门 (ILG) 在La0.67Sr0.33CoO3薄膜中实现了一种新的铁磁绝缘阶段. 这种由质子兴奋剂 (H+) 诱导的新型阶段,表现出180K的高临界温度 (Tc),为旋转电子应用铺平了道路.
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
- 这就是Spintronics.
背景情况:
- 铁磁绝缘状态对于自旋电子设备应用至关重要.
- 通过电场控制的离子液门 (ILG) 控制材料特性是一个活跃的研究领域.
研究的目的:
- 为了在La0.67Sr0.33CoO3薄膜中达到铁磁绝缘基本状态.
- 调查由ILG诱导的质子 (H+) 兴奋剂的影响.
主要方法:
- 在La0.67Sr0.33CoO3薄膜上进行电场控制的离子液体封闭 (ILG).
- Co L23-边缘吸收光谱和配置交互集群计算.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 首次实现了La0.67Sr0.33CoO3中的质子 (H+) 兴奋剂.
- 观察了一种新的铁磁绝缘相,其高临界温度 (Tc) 高达180K.
- 化学公式的标识为La2/3Sr1/3CoO8/3H2/3,归因于H+的兴奋剂和氧气空缺 (VO).
结论:
- 铁磁基本状态是由Co离子在八面体 (Oh) 和四面体 (Td) 对称的反平行旋转对齐引起的.
- 质子 (H+) 作为转移离子,稳定了新的铁磁绝缘状态.
- 该研究提供了关于ILG机制和双离子操纵的见解,用于控制相关材料中的功能.
相关概念视频
Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
Molecular and Ionic Solids
17.1K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
17.1K


