Magnetization reversal of a Nd-Cu-infiltrated Nd-Fe-B nanocrystalline magnet observed with small-angle neutron scattering

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4908026· OSTI ID:22409945

Saito, Kotaro; Ono, Kanta ^[1]; Ueno, Tetsuro ^[2]; Yano, Masao; Shoji, Tetsuya; Sakuma, Noritsugu; Manabe, Akira; Kato, Akira ^[3]; Harada, Masashi ^[4]; Keiderling, Uwe ^[5]

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1. Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, 305-0803 Tsukuba (Japan)
2. Elements Strategy Initiative Center for Magnetic Materials, National Institute for Materials Science, 1-2-1 Sengen, 305-0047 Tsukuba (Japan)
3. Toyota Motor Corporation, Toyota, Aichi 471-8571 (Japan)
4. Toyota Central R and D Labs, Inc., Aichi 480-1192 (Japan)
5. Helmholtz-Zentrum Berlin für Materialien and Energie, 14109 Berlin (Germany)

The magnetization reversal process of Nd-Fe-B nanocrystalline magnets infiltrated with Nd-Cu alloy was examined using small-angle neutron scattering (SANS). The magnetic-field dependence of SANS intensity revealed a qualitative difference between Nd-Cu-infiltrated samples and as-deformed samples. Insufficient magnetic isolation along the direction perpendicular to the nominal c-axis is expected from comparable SANS intensities for different ranges of q values along this direction. For small q values near the coercivity field, Nd-Cu-infiltrated samples show a noticeable reduction in SANS intensity along the nominal c-axis, which is parallel to the external magnetic field. This indicates less spatial fluctuation of magnetic moments in Nd-Cu-infiltrated samples, owing to magnetically isolated Nd{sub 2}Fe{sub 14}B grains.

• OSTI ID: 22409945
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON ALLOYS
COERCIVE FORCE
COMPARATIVE EVALUATIONS
COPPER ALLOYS
CRYSTALS
FLUCTUATIONS
IRON ALLOYS
MAGNETIC FIELDS
MAGNETIC MATERIALS
MAGNETIC MOMENTS
MAGNETIZATION
MAGNETS
NANOSTRUCTURES
NEODYMIUM ALLOYS
NEUTRON DIFFRACTION
SMALL ANGLE SCATTERING