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Magnetic field dependence of /sup 11/B and /sup 57/Fe NMR in a Nd/sub 2/Fe/sub 14/B compound (abstract)

Journal Article · · J. Appl. Phys.; (United States)
DOI:https://doi.org/10.1063/1.342289· OSTI ID:6749348
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The /sup 10/B, /sup 11/B, and /sup 57/Fe spin-echo nuclear magnetic resonance (NMR) and magnetization experiments have been performed for naturally abundant and /sup 10/B-enriched Nd/sub 2/Fe/sub 14/B at 1.3 and 4.2 K for frequencies from 10 to 80 MHz. It was found from a comparison of NMR spectra in zero field and in an external field of 6.0 kOe that the hyperfine fields at the domain edges and at the domain-wall centers are nearly the same. This implies that the Fe hyperfine field anisotropy is small in this system. The presence of spin canting was verified by the result that the /sup 11/B NMR frequency shift due to the applied external magnetic field does not exactly follow ..gamma..(/sup 11/B)..delta..H. The NMR technique proves to be sensitive in detecting the trace of Fe precipitate in the Nd-Fe-B permanent magnets.

Research Organization:
Department of Physics and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06268
OSTI ID:
6749348
Journal Information:
J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 64:10; ISSN JAPIA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BORIDES
BORON 11
BORON COMPOUNDS
BORON ISOTOPES
EVEN-ODD NUCLEI
FREQUENCY RANGE
INTERMEDIATE MASS NUCLEI
IRON 57
IRON BORIDES
IRON COMPOUNDS
IRON ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETIZATION
MAGNETS
MHZ RANGE
MHZ RANGE 01-100
NEODYMIUM BORIDES
NEODYMIUM COMPOUNDS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
PERMANENT MAGNETS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RESONANCE
STABLE ISOTOPES
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE