Paramagnetic spin fluctuations in the weak itinerant-electron ferromagnet MnSi
- 1. Physics Department, Tohoku University, Sendai, 980, Japan
Description
Paramagnetic spin fluctuations in the weak itinerant-electron ferromagnet MnSi have been measured by using both unpolarized and polarized neutron scattering, and the scattering intensity was put on an absolute value by the simultaneous measurements of phonon cross sections. The magnetic excitation spectra over the whole Brillouin zone, for a wide energy range from 0 to 20 meV (hω/kT/sub c/ = 7.9) and up to temperatures (T/T/sub c/ = 10) well above T/sub c/, follow closely the Moriya-Kawabata self-consistent-renormalization theory for the weak itinerant-electron ferromagnet. Based on these experimental results, the origin of the increase in the amplitude of the local magnetic moment above T/sub c/ is attributed to the thermal excitations of the high-energy spin fluctuations in the Stoner continuum
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 31
- Journal Issue
- 9
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 5884-5893
- ISSN
- 0163-1829
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 16077280
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- FERROMAGNETIC MATERIALS; FLUCTUATIONS; INTERMETALLIC COMPOUNDS; MAGNETIC PROPERTIES; MANGANESE SILICIDES; NEUTRON DIFFRACTION; SPIN
- Descriptors DEC
- ALLOYS; ANGULAR MOMENTUM; COHERENT SCATTERING; DIFFRACTION; MAGNETIC MATERIALS; MANGANESE COMPOUNDS; MATERIALS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; SCATTERING; SILICIDES; SILICON COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; VARIATIONS