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Title: Improvement in magnetic properties of Sm-Fe-N flakes by annealing under Zn vapor

Abstract

A new method for improving the coercivity and stability of magnetic properties of Sm-Fe-N flakes by annealing under Zn vapor is proposed. Annealing of the flakes at 380 C with Zn foil under an Ar atmosphere deposited a Zn film, resulted in formation of Fe-Zn compounds on the surface of the flakes, and improved the coercivity by 2--5 kOe. The deposition of approximately 1 wt.% Zn was enough to obtain a remarkable improvement in the coercivity. The Zn-treatment also suppressed the deterioration of the coercivity and the remanence due to exposure to air at 300 C, and an increase in the amount of Zn caused an increase in their stability. Therefore, the proposed method is expected to be a promising method for improving magnetic properties and their stability of Sm-Fe-N flakes by Zn-treatment.

Authors:
; ; ;
Publication Date:
Research Org.:
Nagasaki Univ. (JP)
OSTI Identifier:
20000759
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt2; Conference: 1999 international magnetics conference (Intermag '99), Kyongju (KR), 05/18/1999--05/21/1999; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CONTROLLED ATMOSPHERES; COERCIVE FORCE; MAGNETIC PROPERTIES; ZINC; ANNEALING; ARGON; SAMARIUM ALLOYS; NITROGEN ADDITIONS; IRON ALLOYS

Citation Formats

Fukunaga, Hirotoshi, Murakami, Kouichi, Song, J.M., and Koh, J.G. Improvement in magnetic properties of Sm-Fe-N flakes by annealing under Zn vapor. United States: N. p., 1999. Web. doi:10.1109/20.800504.
Fukunaga, Hirotoshi, Murakami, Kouichi, Song, J.M., & Koh, J.G. Improvement in magnetic properties of Sm-Fe-N flakes by annealing under Zn vapor. United States. doi:10.1109/20.800504.
Fukunaga, Hirotoshi, Murakami, Kouichi, Song, J.M., and Koh, J.G. Wed . "Improvement in magnetic properties of Sm-Fe-N flakes by annealing under Zn vapor". United States. doi:10.1109/20.800504.
@article{osti_20000759,
title = {Improvement in magnetic properties of Sm-Fe-N flakes by annealing under Zn vapor},
author = {Fukunaga, Hirotoshi and Murakami, Kouichi and Song, J.M. and Koh, J.G.},
abstractNote = {A new method for improving the coercivity and stability of magnetic properties of Sm-Fe-N flakes by annealing under Zn vapor is proposed. Annealing of the flakes at 380 C with Zn foil under an Ar atmosphere deposited a Zn film, resulted in formation of Fe-Zn compounds on the surface of the flakes, and improved the coercivity by 2--5 kOe. The deposition of approximately 1 wt.% Zn was enough to obtain a remarkable improvement in the coercivity. The Zn-treatment also suppressed the deterioration of the coercivity and the remanence due to exposure to air at 300 C, and an increase in the amount of Zn caused an increase in their stability. Therefore, the proposed method is expected to be a promising method for improving magnetic properties and their stability of Sm-Fe-N flakes by Zn-treatment.},
doi = {10.1109/20.800504},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt2,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}