skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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.

Authors:
;  [1];  [2]; ; ; ; ;  [3];  [4];  [5]
  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)
Publication Date:
OSTI Identifier:
22409945
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Saito, Kotaro, E-mail: kotaro.saito@kek.jp, Ono, Kanta, Ueno, Tetsuro, Yano, Masao, Shoji, Tetsuya, Sakuma, Noritsugu, Manabe, Akira, Kato, Akira, Harada, Masashi, and Keiderling, Uwe. Magnetization reversal of a Nd-Cu-infiltrated Nd-Fe-B nanocrystalline magnet observed with small-angle neutron scattering. United States: N. p., 2015. Web. doi:10.1063/1.4908026.
Saito, Kotaro, E-mail: kotaro.saito@kek.jp, Ono, Kanta, Ueno, Tetsuro, Yano, Masao, Shoji, Tetsuya, Sakuma, Noritsugu, Manabe, Akira, Kato, Akira, Harada, Masashi, & Keiderling, Uwe. Magnetization reversal of a Nd-Cu-infiltrated Nd-Fe-B nanocrystalline magnet observed with small-angle neutron scattering. United States. doi:10.1063/1.4908026.
Saito, Kotaro, E-mail: kotaro.saito@kek.jp, Ono, Kanta, Ueno, Tetsuro, Yano, Masao, Shoji, Tetsuya, Sakuma, Noritsugu, Manabe, Akira, Kato, Akira, Harada, Masashi, and Keiderling, Uwe. Thu . "Magnetization reversal of a Nd-Cu-infiltrated Nd-Fe-B nanocrystalline magnet observed with small-angle neutron scattering". United States. doi:10.1063/1.4908026.
@article{osti_22409945,
title = {Magnetization reversal of a Nd-Cu-infiltrated Nd-Fe-B nanocrystalline magnet observed with small-angle neutron scattering},
author = {Saito, Kotaro, E-mail: kotaro.saito@kek.jp and Ono, Kanta and Ueno, Tetsuro and Yano, Masao and Shoji, Tetsuya and Sakuma, Noritsugu and Manabe, Akira and Kato, Akira and Harada, Masashi and Keiderling, Uwe},
abstractNote = {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.},
doi = {10.1063/1.4908026},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}