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Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

1.1K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
1.1K
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
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

4.1K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
4.1K
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
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

4.6K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
4.6K
Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

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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

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相关实验视频

Updated: Jul 11, 2025

Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma
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Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

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在圆柱形纳米管中的磁双子子.

David Galvez1, Mario Castro1, Guilherme Bittencourt2

  • 1Departamento de Física, CEDENNA, Universidad de Santiago de Chile, Santiago 9170124, Chile.

Nanomaterials (Basel, Switzerland)
|November 10, 2023
PubMed
概括

这项研究使用微磁模拟分析了纳米管中的磁性双稳定性. 结果根据纳米管尺寸和材料特性绘制了双边稳定区域的地图,识别了其他磁性状态.

科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术

背景情况:

  • 磁性双边子是复杂的旋转纹理,在数据存储中具有潜在的应用.
  • 了解它们在像纳米管这样的狭窄几何结构中的稳定性,对于设备开发至关重要.

研究的目的:

  • 为了研究圆柱形纳米管内磁性双边子的稳定性.
  • 为了确定磁性和几何参数对双特征的影响.

主要方法:

  • 利用微磁模拟来模拟磁性双鸟的行为.
  • 分析了不同纳米管尺寸 (高度,半径) 和材料特性 (异性质,Dzyaloshinskii-Moriya相互作用) 的影响.

主要成果:

  • 开发了稳定性图表,说明双子存在和尺寸作为纳米管参数的函数.
  • 在双重子不稳定的区域中识别了状和和磁性状态.

结论:

  • 这项研究为纳米管中磁性双边子的操作极限提供了关键的见解.
  • 这些发现通过调整几何和磁性特性,可以精确控制双重状态.
关键词:
磁性双色球 双色球 双色球微磁仿真微磁仿真是一种微磁仿真.一个相位图的相位图.

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Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
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