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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

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...
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

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...
Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
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Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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.
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Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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Colors and Magnetism

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 eye.

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Related Experiment Video

Updated: May 11, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

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

Published on: March 24, 2019

Magnetic field-induced ordering in SrDy2O4.

T H Cheffings1, M R Lees, G Balakrishnan

  • 1Department of Physics, University of Warwick, Coventry, UK.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|May 31, 2013
PubMed
Summary

Strontium dysprosium oxide (SrDy2O4) exhibits unusual field-induced magnetic ordering. A magnetic field along the [010] direction triggers a sharp transition, unlike the broad features observed for fields along [001].

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Last Updated: May 11, 2026

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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7&#8722;&#948;/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates

Published on: April 12, 2019

Area of Science:

  • Condensed matter physics
  • Magnetism and magnetic materials
  • Thermodynamics

Background:

  • SrDy2O4 is a geometrically frustrated magnetic system.
  • Understanding magnetic ordering in frustrated systems is crucial for developing novel magnetic materials.

Purpose of the Study:

  • To investigate the magnetic ordering processes in single-crystal SrDy2O4 under magnetic fields.
  • To explore the influence of field orientation on magnetic transitions.

Main Methods:

  • Heat capacity measurements were performed on single-crystal SrDy2O4 samples.
  • Magnetic fields were applied along the [010] and [001] crystallographic directions.

Main Results:

  • In zero field, SrDy2O4 remains magnetically disordered down to 0.39 K.
  • A sharp heat capacity peak, indicating a transition, was observed at 20 kOe for H // [010].
  • Broad features in heat capacity were observed for H // [001], suggesting a different ordering process.

Conclusions:

  • Field-induced magnetic ordering in SrDy2O4 is highly dependent on field orientation.
  • The observed transitions are remarkable, even within the context of geometrically frustrated magnetic systems.