Paramagnetic spin fluctuations in an Fe/sub 65/Ni/sub 35/ Invar alloy

Journal Article · Thu Jan 01 00:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.274· OSTI ID:6884144

Tajima, K; Boeni, P; Shirane, G; Ishikawa, Y; Kohgi, M

Polarized neutron scattering experiments have been performed on an Fe/sub 65/Ni/sub 35/ Invar alloy in the paramagnetic phase at T = 1.25T/sub c/. Constant-q spectra were fitted to simple Lorentzian functions and the q-dependence of the half-width GAMMA was found to agree with that of the spin-diffusion model in the measured q range (0.1 A/sup -1/<0.9A/sup -1/). The amplitude of the spin fluctuation can be well described by the localized model with parameters which are deduced from the measured spin-wave dispersion at low temperature, the magnetization, and the uniform susceptibility. The model can be also applied satisfactorily to other itinerant metals such as Fe and Ni.

• Research Organization: Department of Physics, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama 223, Japan
• OSTI ID: 6884144
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 35:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON ALLOYS
NEUTRON DIFFRACTION
SPIN
NICKEL ALLOYS
DISPERSION RELATIONS
EXPERIMENTAL DATA
FLUCTUATIONS
HIGH TEMPERATURE
INVAR
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MONOCRYSTALS
PARAMAGNETISM
POLARIZATION
SPIN WAVES
ALLOYS
ANGULAR MOMENTUM
COHERENT SCATTERING
CRYSTALS
DATA
DIFFRACTION
INFORMATION
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MAGNETISM
NUMERICAL DATA
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SCATTERING
VARIATIONS
360104* - Metals &amp; Alloys- Physical Properties