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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

2.8K
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...
2.8K
Metallic Solids02:37

Metallic Solids

20.2K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.2K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

47.3K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
47.3K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

29.9K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
29.9K
Diamagnetism01:26

Diamagnetism

2.8K
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....
2.8K

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Related Experiment Video

Updated: Dec 13, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

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Two-dimensional ferromagnetism in CrTe flakes down to atomically thin layers.

Mingshan Wang1, Lixing Kang, Jianwei Su

  • 1Wuhan National High Magnetic Field Center and Department of Physics, Huazhong University of Science and Technology (HUST), Wuhan 430074, China. junbo.han@mail.hust.edu.cn.

Nanoscale
|July 31, 2020
PubMed
Summary
This summary is machine-generated.

Researchers synthesized a new 2D chromium tellurium (CrTe) ferromagnet using chemical vapor deposition. This ultrathin material exhibits robust hard magnetism and perpendicular anisotropy, showing potential for spintronic devices.

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Two-dimensional (2D) ferromagnetism is crucial for fundamental physics and novel device applications.
  • Current 2D ferromagnetic materials are often produced via mechanical exfoliation, limiting scalability and industrial application.
  • Controllable synthesis methods for 2D intrinsic magnetic materials are highly sought after.

Purpose of the Study:

  • To develop a controllable fabrication process for a new 2D intrinsic magnetic material.
  • To synthesize and characterize chromium tellurium (CrTe) using chemical vapor deposition (CVD).
  • To investigate the magnetic properties of CrTe, including its anisotropy and temperature dependence.

Main Methods:

  • Chemical Vapor Deposition (CVD) for synthesizing 2D CrTe flakes.
  • Magneto-Optical Kerr Effect (MOKE) technique for magnetic property characterization.
  • Thickness-dependent analysis of magnetic behavior and Curie temperature (TC).

Main Results:

  • Successful synthesis of 2D CrTe via CVD.
  • Demonstration of hard magnetism and strong perpendicular anisotropy in CrTe flakes.
  • Sustained hard magnetism across thicknesses from 45 nm to 11 nm.
  • Curie temperature (TC) decreased from 205 K to 140 K with decreasing thickness.

Conclusions:

  • CrTe is a novel ultrathin hard magnetic material with significant perpendicular anisotropy.
  • The CVD method offers a scalable route for producing 2D CrTe.
  • This material holds promise for mass fabrication and application in spintronic devices.