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Effect of Preparation Condition on Magnetic Properties of Nd-Fe-B/α-Fe Multi-layered Thick Film-Magnets Prepared by PLD Method


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Title: Effect of Preparation Condition on Magnetic Properties of Nd-Fe-B/α-Fe Multi-layered Thick Film-Magnets Prepared by PLD Method
Authors: Fukunaga, Hirotoshi / Kamikawatoko, Takashi / Tou, Akinori / Nakano, Masaki / Yanai, Takeshi / Yamashita, Fumitoshi
Issue Date: Nov-2012
Publisher: Institute of Electrical and Electronics Engineers Inc.
Citation: IEEE Transactions on Magnetics, 48(11), pp.3154-3157; 2012
Abstract: Nd-Fe-B/α-Fe multi-layered thick film-magnets were synthesized by PLD method from a Nd2.4Fe14B/α-Fe composite target. In order to improve magnetic properties and their reproducibility, effects of the stacking period of Nd-Fe-B/α-Fe layers, tp, the target-substrate distance, DTS, and the laser beam energy on a target, EL, on them were studied. The reproducibility of magnetic properties was improved significantly by decreasing LE. In particular, the standard deviation of the Nd content was suppressed within 3%, when LE was reduced from a value higher than 200 mJ/mm2 to 25 mJ/mm2. An increase in DTS and selection of a suitable tp value improved the maximum energy product (BH)max. The largest (BH)max value obtained in this investigation was 112 kJ/m3, which is higher than the values reported previously for isotropic film-magnets thicker than 10 μm. Origins of superior magnetic properties were discussed from the viewpoints of suitable interlayer exchange interaction between Nd-Fe-B and α-Fe layers and morphology of prepared film-magnets.
Keywords: Layered structure / nanocomposite magnet / Nd-Fe-B / pulse laser deposition (PLD) method / thick film-magnet
URI: http://hdl.handle.net/10069/30994
ISSN: 00189464
DOI: 10.1109/TMAG.2012.2206073
Rights: © 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/30994

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