Radiation effects in amorphous Fe/sub x/Ni/sub 80-x/P/sub 14/B/sub 6/
Changes in the Curie temperature and magnetic saturation of the amorphous ferromagnetic series Fe/sub x/Ni/sub 80-x/P/sub 14/B/sub 6/ for 20 less than or equal to x less than or equal to 34 induced by proton bombardment have been studied, and correlated with small angle x-ray scattering measurements performed for x = 20 at Oak Ridge National Laboratory. Both the Curie temperature and the low temperature saturation magnetization increase with proton fluence up to 10/sup 16/ cm/sup -2/ but are constant for higher fluences. Protons of energy 2.25 MeV (range much greater than the sample thickness) are more effective at producing changes than protons of energy 0.25 MeV (range much less than sample thickness). Thus, hydrogen implantation is eliminated as the principal source of the observed changes. In addition, careful attention to sample temperature during irradiation excludes thermal annealing as the origin of the effect. Proton bombardment at the same fluences produces scattering centers that are observed by small angle x-ray scattering. The concentration of scattering centers increases with proton fluence up to 10/sup 16/ cm/sup -2/, but remains constant thereafter. The size of the centers remains constant at about 16 to 30 A. Possible structural changes to account for these observations are incipient recrystallization, void formation, and phosphorous segregation.
- Research Organization:
- Delaware Univ., Newark, DE (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-80ER10571
- OSTI ID:
- 7052386
- Report Number(s):
- DOE/ER/10571-2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Radiation effects in amorphous metallic alloys. Progress report, February 1, 1981-January 31, 1982
Radiation effects in amorphous metallic alloys. Final report
Related Subjects
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
AMORPHOUS STATE
BARYONS
BORON ALLOYS
CHEMICAL COMPOSITION
CURIE POINT
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FERROMAGNETIC MATERIALS
HADRONS
IRON ALLOYS
KEV RANGE
KEV RANGE 100-1000
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETIZATION
MATERIALS
MEV RANGE
MEV RANGE 01-10
NICKEL ALLOYS
NUCLEONS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
PNICTIDES
PROTONS
QUANTITY RATIO
RADIATION EFFECTS
RECRYSTALLIZATION
SCATTERING
SEGREGATION
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VOIDS