Topics:PCG Portfolio

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PCG-SCMP – Educational portfolio

Crystal structures and their transformations
  • Space Group Symmetry
  • Symmetry lowering
  • Structural phase transitions – Landau theory
  • Representation analysis
  • Tensors in crystallography
  • Charge density
  • Modulated crystal structures – Superspace group approach
Elastic properties
  • Strain-stress relations
  • Pressure effects
Bulk properties
  • Thermal expansion in crystals
  • Atomic displacement parameters: relationship with phonons fireworks and specific heat.
Magnetic structures
  • Description of magnetic structures – propagation vectors
  • Magnetic symmetry analysis – irreps and coreps
  • Spin density determination with polarised neutrons.
  • XYZ and spherical polarimetry applied to crystalline materials
Microstructure analysis
  • Strain effects
  • Particle size and distribution
  • Stacking faults
  • Texture
Diffraction methods
  • CW neutron and x-rays
  • TOF neutrons
  • Energy dispersive x-rays
  • Diffraction imaging – TEDDI etc.
  • Time-resolved crystallography
  • Crystallography under high pressure
  • High-magnetic-field crystallography
  • SX techniques: Laue, time-sorted Laue…
Data analysis
  • Refinement of structural parameters –least square – Rietveld
  • Direct-space methods – simulated annealing
  • Single-crystal techniques – twinning
Instrumentation
  • Diffraction geometries
  • Principles of TOF/CW instrument design
  • Detector technologies of X-rays and neutrons