Neutron scattering study of spin waves in the amorphous ferromagnet (Fe/sub 0/ /sub 3/Ni/sub 0/ /sub 7/)/sub 0/ /sub 75/P/sub 0/ /sub 16/B/sub 0/ /sub 06/Al/sub 0/ /sub 03/
The neutron inelastic scattering technique was used to measure the collective magnetic excitation spectrum in the ferromagnetic (T/sub C/ approximately 255/sup 0/K) metallic glass (Fe/sub 0/./sub 3/Ni/sub 0/./sub 7/)/sub 0/./sub 75/P/sub 0/./sub 16/B/sub 0/./sub 06/Al/sub 0/./sub 03/. In this system only the iron atoms appear to be magnetic, and the observation of relatively well-defined spin waves is striking in comparison with other amorphous systems where the spin waves rapidly broaden with decreasing iron concentration. The spin waves obey the conventional quadratic dispersion relation E/sub sw/ = DQ/sup 2/, with D = 35 MeV-A/sup 2/. Contributions from fourth and higher order terms in the dispersion relation are not in evidence for wave vectors in the region investigated (Q less than or approximately 0.25 A/sup -1/).
- Research Organization:
- Brookhaven National Lab., Upton, N.Y. (USA); Massachusetts Inst. of Tech., Cambridge (USA); Bell Labs., Murray Hill, N.J. (USA)
- DOE Contract Number:
- E(30-1)-16
- OSTI ID:
- 7356907
- Report Number(s):
- BNL-21391; CONF-760619-4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
AMORPHOUS STATE
BARYONS
BORON ADDITIONS
BORON ALLOYS
DISPERSION RELATIONS
ELEMENTARY PARTICLES
FERMIONS
FERROMAGNETISM
GLASS
HADRONS
IRON COMPOUNDS
IRON PHOSPHIDES
MAGNETISM
NEUTRONS
NICKEL COMPOUNDS
NICKEL PHOSPHIDES
NUCLEONS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PNICTIDES
SCATTERING
SPIN WAVES
TRANSITION ELEMENT COMPOUNDS