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Nuclear Polarization in Polycrystalline Holmium-Indium Alloy

Journal Article · · Physical Review
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Holmium and indium nuclei have been polaiized by nuclear hyperfine interaction in a polycrystalline ferromagnetic alloy, 92.2% holmium-7.8% indium. The nuclear polarization for each constituent was determined from the transmission of monochromatic, polarized neutron beams at neutron energies corresponding to resonances in the holmium and indium cross sections. A series of measarements at several temperatures from 0.071 to 4.225 deg K yield the following values for the hyperfine constant: for holmium, A/k = 0.58 plus or minus 0.03 deg K (corresponding to an effective field at the nucleus, H/sub eff/ = plus or minus 8.4 x 10/sup 6/ Oe); and for In, A/k =--0.013 plus or minus 0.002 deg K (corresponding to H/sub eff/ = 1.3 x 10/sup 5/ Oe). The effect on the nuclear polarization of the magnetic anisotropy of the polycrystalline sample is discussed. (auth)

Research Organization:
Brookhaven National Lab., Upton, N.Y.
Sponsoring Organization:
US Atomic Energy Commission (AEC)
DOE Contract Number:
AT(30-2)-GEN-16
NSA Number:
NSA-16-029567
OSTI ID:
4790199
Report Number(s):
BNL-6058; 0031-899X
Journal Information:
Physical Review, Journal Name: Physical Review Journal Issue: 4 Vol. 127; ISSN PHRVAO; ISSN 0031-899X
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

References (15)

Neutron Diffraction by Helical Spin Structures journal March 1961
Internal Magnetic Field in Rare Earth Metals journal September 1961
The Nuclear Magnetic Moment of Holmium 165 journal November 1955
Magnetic Ordering in the Ferromagnetic Rare-Earth Metals journal March 1961
Gadolinium and dyprosium intermetallic phases. II. Laves phases and other structure types journal September 1961
Transmission of Polarized Neutrons through Samples of PolarizedHo165Nuclei journal May 1962
Spin States Associated with Neutron Resonances inIn115 journal April 1960
Some Effects of Anisotropy on Spiral Spin-Configurations with Application to Rare-Earth Metals journal October 1961
Nuclear Specific Heat of Holmium journal November 1961
Low-Temperature Magnetic Remanence, Molecular Field, and Approach to Saturation of Holmium Metal journal January 1960
High Resolution Crystal Spectrometer for Neutrons journal January 1956
"Brute Force" Polarization ofIn115Nuclei; Angular Momentum of 1.458-ev Neutron Resonance journal June 1955
Origin of Effective Fields in Magnetic Materials journal September 1961
Resonance Scattering of Slow Neutrons on Indium journal January 1958
Phenomenological Discussion of Magnetic Ordering in the Heavy Rare-Earth Metals journal October 1961

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Related Subjects

FERROMAGNETIC MATERIALS
HOLMIUM ALLOYS
INDIUM ALLOYS
INTERACTIONS
MEASURED VALUES
NEUTRON BEAMS
NUCLEAR STRUCTURE
PHYSICS
POLARIZATION
RESONANCE