NDLI: Hydrogen Pressure and Temperature Dependence of the Disproportionated State and Magnetic Anisotropy in the <inline-formula> <tex-math notation=LaTeX>${d}$ </tex-math></inline-formula>-HDDR Process of Nd–Fe–B–Ga

Content Provider	IEEE Xplore Digital Library
Author	Horikawa, T. Matsuura, M. Sugimoto, S. Yamazaki, M. Mishima, C.
Copyright Year	1965
Abstract	Nd-Fe-B-based alloy powders were subjected to the dynamic hydrogen disproportionation desorption recombination treatment and the effect of the hydrogen pressure and temperature conditions in the disproportination step on magnetic anisotropy as well as the state of disproportionated samples was investigated. Magnetic anisotropy was maximized when the sample was hydrogen disproportionated at 30 kPa and 800 °C-820 °C. The analyses of the X-ray diffraction (XRD) patterns showed that the iron boride phase formed during the hydrogen disproportionation step crystallized in the tetragonal structure. The lattice parameters and the peak intensity of this iron boride phase in XRD patterns varied depending on the disproportionation conditions. Both magnetic anisotropy and iron boride peak intensity became stronger when the disproportionation condition was close to the boundary of disproportionation and recombination reactions. These results suggest that there is some kind of relationship between magnetic anisotropy and the state of iron boride phase in disproportionated samples.
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	4
Page Count	4
File Size	904687
File Format	PDF
ISSN	00189464
Volume Number	51
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	High definition video Powders Iron Hydrogen Perpendicular magnetic anisotropy X-ray scattering Reaction rate Fe-B HDDR Magnetic anisotropy Nd-Fe-B magnet reaction rate Fe–B hydrogen disproportionation desorption recombination (HDDR) magnetic anisotropy Nd–Fe–B magnet
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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