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Related Concept Videos

Metallic Solids02:37

Metallic Solids

19.3K
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....
19.3K
Ferromagnetism01:31

Ferromagnetism

2.5K
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...
2.5K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.1K
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...
28.1K
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

777
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
777
Colors and Magnetism03:02

Colors and Magnetism

12.4K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.4K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

10.1K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
10.1K

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Updated: Sep 24, 2025

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
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Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

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Visualizing Atomically Layered Magnetism in CrSBr.

Daniel J Rizzo1, Alexander S McLeod1, Caitlin Carnahan2

  • 1Department of Physics, Columbia University, New York, NY, 10027, USA.

Advanced Materials (Deerfield Beach, Fla.)
|May 3, 2022
PubMed
Summary
This summary is machine-generated.

Few-layer chromium(III) bromide (CrSBr) exhibits tunable magnetic states. Layer thickness and external fields control its antiferromagnetic phase, enabling nanoscale magnetic switching.

Keywords:
2D magnets2D materialsmagnetic force microscopymagnetometryvan der Waals materials

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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Two-dimensional (2D) materials with magnetic order are crucial for next-generation electronics.
  • Understanding how atomic layers and strain influence magnetic phases is essential for 2D magnet applications.
  • CrSBr is a promising 2D material for exploring magnetic phenomena.

Purpose of the Study:

  • To investigate the impact of layer thickness and nanoscale strain on magnetic ordering in few-layer CrSBr.
  • To visualize and quantify spatially dependent magnetism using advanced techniques.
  • To explore the field-tunability of magnetic phases in 2D materials.

Main Methods:

  • Magnetic Force Microscopy (MFM) for nanoscale magnetic imaging.
  • Monte Carlo-based simulations to model magnetic behavior.
  • Analysis of force-distance curves to extract magnetic sheet susceptibility.

Main Results:

  • Spatially dependent magnetism was observed in few-layer CrSBr.
  • Odd-layer terraces showed reduced antiferromagnetic (AFM) stability and multiple magnetic ground states near the Néel temperature (TN).
  • The AFM phase was suppressed by modest magnetic fields (≈16 mT), demonstrating nanoscale magnetic switching.

Conclusions:

  • Layer parity critically influences field-tunable magnetism in 2D materials.
  • MFM is a validated tool for nanomagnetometry of 2D materials.
  • Few-layer CrSBr serves as a model system for understanding and controlling 2D magnetism.