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An overstoichiometric Nd–Fe–B hard magnetic material

SYSNO ASEP	0353549
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	An overstoichiometric Nd–Fe–B hard magnetic material
Author(s)	Žák, Tomáš (UFM-A)_RID Talijan, N. (CS) Ćosović, V. (CS) Stajić-Trošić, J. (CS) Grujić, A. (CS)
Number of authors	5
Source Title	Journal of the Serbian Chemical Society - ISSN 0352-5139 Roč. 75, č. 9 (2010), s. 1271-1277
Number of pages	7 s.
Language	eng - English
Country	SR - Surinam
Keywords	rapid quenched Nd–Fe–B ; overstoichiometric Nd content ; Mössbauer phase analysis ; XRD ; magnetic properties
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	1M0512 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z20410507 - UFM-A (2005-2011)
UT WOS	000283207200011
DOI	10.2298/JSC100217058Z
Annotation	A commercial Nd-rich Nd–Fe–B-based hard magnetic material was studied. The thermomagnetic curve showed clearly besides Curie points of the Nd2Fe14B phase and α-Fe also another critical temperature. Mössbauer (MS) phase analysis and X-ray diffraction analysis (XRD) showed in addition to the commonly known phases Nd2Fe14B and NdFe4B4 also some paramagnetic and ferromagnetic iron atoms (MS) and Fe17Nd2 intermetallics (XRD). During the exerted thermal treatment, the content of the Nd2Fe14B and NdFe4B4 phases remained almost unchanged, while iron atoms from remnant minor phases built a separate α-Fe phase. The XRD pattern also showed the presence of some minor Nd phase. The results of Squid measurements suggest a nanocrystalline decoupled structure of the Nd-rich alloy in the optimized magnetic state. Measurement of the magnetization loop showed, in spite of small changes in the phase composition, that magnetic properties of the quality material deteriorated during the thermal treatment.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2011

Number of the records: 1