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Related Concept Videos

Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
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X-ray Diffraction of Biological Samples

X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
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Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...

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Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
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Electron backscattering diffraction and X-ray diffraction studies of interface relationships in Sr3Ru2O7/Sr2RuO4

R Ciancio1, H Pettersson2, R Fittipaldi3

  • 1CNR-SPIN and Department of Physics "E.R. Caianiello", University of Salerno, I-84081 Baronissi (SA), Italy; Department of Applied Physics, Microscopy and Microanalysis, Chalmers University of Technology, SE-41296 GÄoteborg, Sweden; CNR-IOM, TASC Laboratory, Area Science Park - Basovizza, I-34149 Trieste, Italy.

Micron (Oxford, England : 1993)
|October 15, 2010
PubMed
Summary
This summary is machine-generated.

The study of the strontium ruthenate eutectic system reveals ordered lamellar growth. This ordered structure shows distinct interfacial properties depending on lattice matching, impacting crystal orientation.

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Crystallography

Background:

  • Investigating complex oxide systems like strontium ruthenates is crucial for understanding emergent electronic properties.
  • Eutectic systems offer unique microstructures for exploring phase interactions and interfacial phenomena.

Purpose of the Study:

  • To analyze the microstructure and crystallographic orientation of the Sr3Ru2O7/Sr2RuO4 eutectic system.
  • To correlate lattice matching at interfaces with the degree of orientation spread in the eutectic structure.

Main Methods:

  • Electron Backscattering Diffraction (EBSD) for nanoscale orientation analysis.
  • X-ray Diffraction (XRD) for macroscopic crystallographic characterization.

Main Results:

  • Ordered lamellar growth of Sr3Ru2O7 and Sr2RuO4 phases along the b-axis was observed.
  • Interfaces with poor lattice matching (along the c-axis) exhibited a significant b-axis orientation spread (~5°).
  • Interfaces with good lattice matching (along the a-axis) showed minimal b-axis orientation change (~0.25°).

Conclusions:

  • The growth direction and lattice matching at interfaces significantly influence the microstructure and crystallographic order in eutectic materials.
  • EBSD and XRD confirm nanoscale and macroscopic structural characteristics, respectively.
  • This ordered eutectic structure provides a platform for studying anisotropic properties in complex oxides.