Neutron scattering study of the magnetic excitations in ferromagnetic iron at high energy transfers

Conference · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5581551

Loong, C K; Carpenter, J M; Lynn, J W; Robinson, R A; Mook, H A

We have measured the spin-wave spectrum of iron by neutron inelastic scattering using the Low-Resolution Medium-Energy Chopper Spectrometer at the Intense Pulsed Neutron Source (IPNS) of the Argonne National Laboratory. Interest focuses on the magnetic excitations at high energy transfers where the spin-wave dispersion relation has not previously been determined. In measurements performed at 10K using a 23-gram single crystal of pure iron, we observed magnetic scattering around the (110) reciprocal lattice point with spin-wave energies from 40 to 160 meV. The spin-waves over the entire range of energy are found to be consistent with an isotopic spin-wave dispersion relation. With the present experimental sensitivity we were unable to observe any band structure effects such as Stoner excitations or optical magnons in this range of wave vector and energy.

• Research Organization: Oak Ridge National Lab., TN (USA); Argonne National Lab., IL (USA); Los Alamos National Lab., NM (USA); Maryland Univ., College Park (USA). Dept. of Physics and Astronomy
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5581551
• Report Number(s): CONF-831187-15; ON: DE84003552
• Resource Relation: Conference: MMM conference, Pittsburgh, PA, USA, 8 Nov 1983
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
IRON
NEUTRON DIFFRACTION
SPIN WAVES
DISPERSION RELATIONS
EXPERIMENTAL DATA
FERROMAGNETIC MATERIALS
INELASTIC SCATTERING
MAGNETIC PROPERTIES
MAGNONS
NEUTRON SPECTROMETERS
SPECTRA
TIME-OF-FLIGHT SPECTROMETERS
ULTRALOW TEMPERATURE
COHERENT SCATTERING
DATA
DIFFRACTION
ELEMENTS
INFORMATION
MAGNETIC MATERIALS
MATERIALS
MEASURING INSTRUMENTS
METALS
NUMERICAL DATA
PHYSICAL PROPERTIES
QUASI PARTICLES
SCATTERING
SPECTROMETERS
TRANSITION ELEMENTS
360104* - Metals & Alloys- Physical Properties
656000 - Condensed Matter Physics