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Related Concept Videos

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
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Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
First Law: Particles in One-dimensional Equilibrium01:10

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Metallic Solids02:37

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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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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

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

Published on: June 7, 2018

Characterizing order in amorphous systems.

François Sausset1, Dov Levine

  • 1Department of Physics, Technion, Haifa 32000, Israel. francois.sausset@lptms.u-psud.fr

Physical Review Letters
|August 27, 2011
PubMed
Summary
This summary is machine-generated.

We compared three methods for measuring structural order in amorphous materials. The new "patch correlation length" method is effective and reveals local order symmetries without prior assumptions.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Computational Chemistry

Background:

  • Amorphous systems lack long-range order, making their structural characterization challenging.
  • Quantifying local structural order is crucial for understanding material properties.

Purpose of the Study:

  • To measure and compare three distinct correlation lengths for describing structural order in amorphous systems.
  • To evaluate the recently proposed "patch correlation length" method.
  • To investigate the capability of the patch method in characterizing local order symmetries.

Main Methods:

  • Calculation of three different correlation lengths, including the patch correlation length.
  • Analysis of correlation lengths as a function of temperature and fragility.
  • Assessment of local order symmetries using the patch method.

Main Results:

  • The patch correlation length is comparable to other established measures.
  • The patch method effectively quantifies structural order across varying temperatures and fragilities.
  • The patch method successfully characterizes local order symmetries without prior information.

Conclusions:

  • The patch correlation length is a viable and effective measure for amorphous systems.
  • The patch method offers a powerful tool for analyzing local structural order and symmetries in disordered materials.