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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...
Types Of Superconductors01:28

Types Of Superconductors

A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
Superconductor01:24

Superconductor

A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Metallic Solids02:37

Metallic Solids

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. Many...

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Related Experiment Video

Updated: May 23, 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

CuBr2--a new multiferroic material with high critical temperature.

Li Zhao1, Tsu-Lien Hung, Ching-Chien Li

  • 1Institute of Physics, Academia Sinica, Taipei, Taiwan.

Advanced Materials (Deerfield Beach, Fla.)
|April 11, 2012
PubMed
Summary

Researchers discovered a new multiferroic material, copper(II) bromide (CuBr2), with a high transition temperature near liquid nitrogen. This material exhibits low dielectric loss and strong magnetoelectric coupling, highlighting anion effects in multiferroic research.

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Last Updated: May 23, 2026

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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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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
  • Solid State Physics
  • Condensed Matter Physics

Background:

  • Multiferroic materials exhibit multiple ferroic orders, such as ferroelectricity and magnetism.
  • High-temperature multiferroics are crucial for advanced technological applications.
  • Low-dimensional spin systems are a promising area for discovering novel multiferroic properties.

Purpose of the Study:

  • To report the discovery and characterization of a new multiferroic material, CuBr2.
  • To investigate the multiferroic properties of CuBr2, including its transition temperature and magnetoelectric coupling.
  • To explore the influence of anion effects on the development of high-temperature multiferroics.

Main Methods:

  • Synthesis and structural characterization of CuBr2.
  • Measurement of magnetic and dielectric properties.
  • Analysis of magnetoelectric coupling effects.

Main Results:

  • CuBr2 is identified as a novel multiferroic material.
  • The material exhibits a high transition temperature, approaching liquid nitrogen temperature.
  • Low dielectric loss and strong magnetoelectric coupling were observed in CuBr2.

Conclusions:

  • The discovery of CuBr2 expands the family of known multiferroic materials.
  • Anion effects play a significant role in achieving high transition temperatures in low-dimensional multiferroics.
  • CuBr2 shows potential for applications requiring high-temperature multiferroic behavior.