基于MoS2的薄膜异构结构中的少数原子层的高温稳定性:结构性,静态性和动态性磁化特性
Nanhe Kumar Gupta1, Amar Kumar1, Lalit Pandey1
1Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India. sujeetc@physics.iitd.ac.in.
Nanoscale
|July 20, 2023
概括
像MoS2这样的过渡金属二甲基化物显示出对自旋电子学的前景. 这项研究揭示了MoS2有效地产生自旋电流,证明了磁性内存应用的高热稳定性.
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:
- 层层的过渡金属二甲基化物 (TMDs) 对旋转器件至关重要.
- TMD 的结构质量及其与铁磁层 (FM) 的接口显著影响设备性能.
- 二硫化物 (MoS2) 是一种广泛研究的TMD,具有潜在的旋转电子应用.
研究的目的:
- 为了研究MoS2/CoFeB异构结构中的自旋动态行为.
- 分析化对这些异构结构的结构,旋转传输和磁性特性的影响.
- 建立MoS2作为一个高效的旋转电流来源,用于旋转电子应用.
主要方法:
- 制造MoS2 (1-4层) /CoFeB (4-15纳米) 异构在成长和化状态 (400°C) 中.
- 使用拉曼光谱进行表征,以分析层数的结构变化.
- 铁磁共振 (FMR) 光谱学用于研究自旋和减.
- 密度函数理论 (DFT) 计算以确认旋转轨道合.
主要成果:
- 拉曼光谱证实了MoS2层分离与层数的系统变化.
- FMR显示了从CoFeB到MoS2的显著旋转送,由增强的阻尼 (∼49-51%) 证明.
- DFT的计算证实了单层MoS2.2中的高旋转轨道合.
- 在MoS2中估计的旋转电流密度随着CoFeB厚度的增加 (∼0.3到0.7MA m-2).
- 在400°C的火并没有显著改变结构或旋转传输特性,这表明其高热稳定性.
结论:
- 由于MoS2的强大的旋转轨道合,MoS2/CoFeB异构结构表现出高效的自旋.
- 这些异构结构的高热稳定性使它们适合苛刻的应用.
- MoS2 作为一个有效的旋转电流发生器,用于基于旋转轨道扭矩的磁性存储器.
更多相关视频
10:36Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
10.6K
08:12Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
Published on: December 5, 2015
12.4K
相关概念视频
01:31Ferromagnetism
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
01:25MOS Capacitor
845
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
845
01:30Paramagnetism
2.5K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.5K
01:17Characteristics of MOSFET
420
Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
420