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Ferromagnetism01:31

Ferromagnetism

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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...
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Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

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An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
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Updated: Jun 8, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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电驱动的长距离固态无形化在铁体中

Gaurav Modi1, Shubham K Parate2, Choah Kwon3

  • 1Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, USA.

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|November 7, 2024
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概括
此摘要是机器生成的。

研究人员使用直流的化纳米线实现了固态无形化,避免了潜在的低功耗电子设备的化. 这一发现揭示了用电场和应力控制铁性材料的新方法.

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科学领域:

  • 材料科学
  • 凝聚物质物理学
  • 纳米技术

背景情况:

  • 电气诱导的无形化通常通过脉冲电流和灭过程实现.
  • 通过避免高温化,固态电形化为低功耗电子应用提供了潜力.

研究的目的:

  • 报告一个节能,非传统的长距离固态无形化在二纳米线.
  • 在没有化的铁性材料中探索电诱导无形化的机制.

主要方法:

  • 将直流 (DC) 偏差应用于β"阶段的化纳米线.
  • 分析电场,电流和压电应力之间的相互作用.
  • 观察层间滑动缺陷和极化旋转导致结构崩.

主要成果:

  • 使用直流偏移实现了节能,远程固态无形化,与脉冲方法不同.
  • 识别了涉及电场,电流和压力的多模式合机制.
  • 证明了关键的障碍水平诱导结构崩和无形化,通过声学效应复制.

结论:

  • 发现了与外部刺激 (电场,电流) 和内部应力相合的新机理.
  • 这些发现为设计低功耗电子和光学新材料和设备铺平了道路.
  • 在纳米尺度上对材料结构和相位过渡进行电气控制的新途径.