Volume production of Nd2Fe14B + Fe3B nanocomposite powders and their magnetic properties in terms of exchange coupling

Volume production of Nd2Fe14B + Fe3B nanocomposite powders and their magnetic properties in terms of exchange coupling

The present study reports the magnetic properties of the Nd4Fe77.5B18.5 compound in term of exchange coupling between Nd2Fe14B and Fe3B magnetic nanocrystals in melt spun powders made by varying the quenching speed. Those magnetic properties were characterized as functions of nanocrystal size and vo...

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Veröffentlicht in:Physica status solidi. A, Applied research Applied research, 2004-06, Vol.201 (8), p.1951-1955
Hauptverfasser: Yang, Choong Jin, Park, Eon Byung, Han, Jong Soo, Kim, Eung Chan
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75.50.Ww
75.75.+a
76.80.+y
81.16.−c
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Physics
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container_end_page 1955
container_issue 8
container_start_page 1951
container_title Physica status solidi. A, Applied research
container_volume 201
creator Yang, Choong Jin
Park, Eon Byung
Han, Jong Soo
Kim, Eung Chan
description The present study reports the magnetic properties of the Nd4Fe77.5B18.5 compound in term of exchange coupling between Nd2Fe14B and Fe3B magnetic nanocrystals in melt spun powders made by varying the quenching speed. Those magnetic properties were characterized as functions of nanocrystal size and volume fraction of each magnetic phase which was possible by employing Henkel plots (δM) and refined Mössbauer spectroscopy. The optimized magnetic properties obtained from the present volume production line were Br = 11.73 kG, iHc = 3.082 kOe, and (BH)max = 12.28 MGOe. The volume fraction of each magnetic phase for those conditions giving the grain size of 10 nm were α‐Fe: 4.2%, Fe3B: 60.1%, and Nd2Fe14B: 35.7%. The superior magnetic properties in the Nd2Fe14B + Fe3B based nanocomposites were confirmed to be dependant on the volume fraction of Fe3B. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
doi_str_mv 10.1002/pssa.200404695
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subjects 75.50.Ww
75.75.+a
76.80.+y
81.16.−c
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Physics
title Volume production of Nd2Fe14B + Fe3B nanocomposite powders and their magnetic properties in terms of exchange coupling
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