Lattice waves, spin waves, and neutron scattering

Technical Report · Sun Jan 01 00:00:00 EST 1961

DOI:https://doi.org/10.2172/4693264· OSTI ID:4693264

Brockhouse, Bertram N.

Use of neutron inelastic scattering to study the forces between atoms in solids is treated. One-phonon processes and lattice vibrations are discussed, and experiments that verified the existence of the quantum of lattice vibrations, the phonon, are reviewed. Dispersion curves, phonon frequencies and absorption, and models for dispersion calculations are discussed. Experiments on the crystal dynamics of metals are examined. Dispersion curves are presented and analyzed; theory of lattice dynamics is considered; effects of Fermi surfaces on dispersion curves; electron-phonon interactions, electronic structure influence on lattice vibrations, and phonon lifetimes are explored. The dispersion relation of spin waves in crystals and experiments in which dispersion curves for spin waves in Co-Fe alloy and magnons in magnetite were obtained and the reality of the magnon was demonstrated are discussed. (D.C.W)

• Research Organization: Atomic Energy of Canada Ltd., Chalk River Project, Chalk River, Ontario (Canada)
• Sponsoring Organization: US Atomic Energy Commission (AEC); Michigan Memorial Phoenix Project
• NSA Number: NSA-17-022271
• OSTI ID: 4693264
• Report Number(s): MMPP-NPC--1-4
• Country of Publication: United States
• Language: English

Related Subjects

ABSORPTION
ATOMS
COBALT ALLOYS
CRYSTALS
DIFFRACTION
ELECTRONS
FERMI LEVEL
FREQUENCY
INTERACTIONS
IRON ALLOYS
IRON OXIDES
LATTICES
LIFETIME
MAGNETISM
MAGNETITE
MAGNONS
MEASURED VALUES
METALS
NEUTRONS
OSCILLATIONS
PARTICLE MODELS
PHONONS
PHYSICS
QUANTUM MECHANICS
SCATTERING
SOLIDS
SOUND
SPIN
SPINELS
STATISTICS
SURFACES
VIBRATIONS