Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

1.2K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
1.2K
Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

4.9K
Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
4.9K
Paramagnetism01:30

Paramagnetism

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
Ferromagnetism01:31

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
Diamagnetism01:26

Diamagnetism

2.4K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.4K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

284
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
284

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Thermally Activated Fluxionality Accelerates Nonradiative Decay in Titania Nanoclusters.

The journal of physical chemistry letters·2026
Same author

Impact of Intrinsic Defects and Tungsten Doping on the Catalytic Properties of Two-Dimensional Cu<sub>2</sub>S.

ACS omega·2026
Same author

Aromaticity-Induced Spin State Switching and High-Spin States in Non-Alternant Polyradicals.

Journal of computational chemistry·2026
Same author

MXenes Surface Termination under Photoexcitation: Insights from Excited-State Pourbaix Diagrams.

ACS applied materials & interfaces·2026
Same author

Structural and electronic properties of MXene flakes: from edge effects to bandgap evolution.

Nanoscale·2026
Same author

YTaNO<sub>2</sub> Janus MXene as an optimal electrocatalyst for the hydrogen evolution reaction.

Physical chemistry chemical physics : PCCP·2026

相关实验视频

Updated: Jul 25, 2025

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording
09:58

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

Published on: February 12, 2020

13.5K

厚度如何影响基于Ti的MXenes中的磁性合?

Néstor García-Romeral1, Ángel Morales-García1, Francesc Viñes1

  • 1Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain. francesc.illas@ub.edu.

Physical chemistry chemical physics : PCCP
|June 26, 2023
PubMed
概括
此摘要是机器生成的。

碳化 (TiC) MXenes具有磁性基态,其自旋密度定位在表面的原子上. 计算揭示了一种反铁磁导电状态,提出了一种二磁内和二磁表面Ti离子的模型.

更多相关视频

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

5.8K
Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Published on: April 12, 2019

7.7K

相关实验视频

Last Updated: Jul 25, 2025

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording
09:58

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

Published on: February 12, 2020

13.5K
Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

5.8K
Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Published on: April 12, 2019

7.7K

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
  • 计算化学计算化学

背景情况:

  • 作为一类二维材料的MXenes因其独特的特性而引起了大量的关注.
  • 早期过渡金属碳化物 (MXenes) 的磁性行为对于潜在的自旋电子应用至关重要.
  • 了解基于Ti的MXenes的电子和磁结构对于材料设计至关重要.

研究的目的:

  • 为了研究Ti2C,Ti3C2和Ti4C3MXenes的磁性基本状态.
  • 用各种密度函数理论 (DFT) 函数来确定旋转顺序和电子性质.
  • 提出一个具有物理意义的旋转模型并提取磁合常量.

主要方法:

  • 使用密度函数理论 (DFT) 进行定期计算.
  • 一般化梯度近似 (GGA) PBE,混合PBE0和HSE06函数的应用,以及PBE+U.
  • 从海森伯格旋转模型中分析旋转密度,旋转顺序和提取磁性合常数.

主要成果:

  • 所有使用的DFT函数都一致地预测了Ti2C,Ti3C2和Ti4C3 MXenes的磁性基态.
  • 旋转密度主要局限于Ti原子的表面.
  • 预测有一个反铁磁导电的基态,铁磁表面层与反铁磁合.
  • 建议使用具有二磁内Ti2+和二磁表面Ti+离子的自旋模型.
  • 最接近邻居层内合是铁磁性和主导性的,具有显著的反铁磁性层间相互作用.
  • MXene的厚度影响铁磁相互作用,随宽度增加而增加.

结论:

  • 基于Ti的MXenes具有内在的磁性,这对于它们的电子特性至关重要.
  • 拟议的旋转模型为理解这些材料中的磁相互作用提供了一个框架.
  • 内层和间层磁性合的相互作用决定了整体的磁性行为.
  • DFT计算为MXenes的磁性特性提供了可靠的见解,指导着未来的材料开发.