Improvement of coercivity of anisotropic Nd-Fe-B HDDR powders by Ga addition

S. Sugimoto; H. Murai; N. Koike; H. Nakamura; D. Book; N. Tezuka; T. Kagotani; M. Okada; M. Homma; K. Inomata

doi:10.1016/S0304-8853(01)00620-5

Improvement of coercivity of anisotropic Nd-Fe-B HDDR powders by Ga addition

S. Sugimoto, H. Murai, N. Koike, H. Nakamura, D. Book, N. Tezuka, T. Kagotani, M. Okada, M. Homma, K. Inomata

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The effect of Ga addition on the increase of coercivity of HDDR-treated Nd-Fe-B powders was investigated. The Ga addition suppresses grain growth and may decrease the region where magnetocrystalline anisotropy is reduced. In addition, a heat treatment in which the hydrogen pressure was decreased in steps during the recombination reaction resulted in good magnetic properties of B_r = 1.44T, _jH_c = 0.97MA m^-1 and (BH)_max = 308 kJm^-3.

Original language	English
Pages (from-to)	444-446
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	239
Issue number	1-3
DOIs	https://doi.org/10.1016/S0304-8853(01)00620-5
Publication status	Published - 2002 Feb

Keywords

Anisotropy
Coercivity
Ga addition
HDDR
Hydrogen pressure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/S0304-8853(01)00620-5

Cite this

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title = "Improvement of coercivity of anisotropic Nd-Fe-B HDDR powders by Ga addition",

abstract = "The effect of Ga addition on the increase of coercivity of HDDR-treated Nd-Fe-B powders was investigated. The Ga addition suppresses grain growth and may decrease the region where magnetocrystalline anisotropy is reduced. In addition, a heat treatment in which the hydrogen pressure was decreased in steps during the recombination reaction resulted in good magnetic properties of Br = 1.44T, jHc = 0.97MA m-1 and (BH)max = 308 kJm-3.",

keywords = "Anisotropy, Coercivity, Ga addition, HDDR, Hydrogen pressure",

author = "S. Sugimoto and H. Murai and N. Koike and H. Nakamura and D. Book and N. Tezuka and T. Kagotani and M. Okada and M. Homma and K. Inomata",

note = "Funding Information: This work has been supported in part by a Grant-in-Aid for Scientific Research on Priority Areas A of “New Protium Function” and No. 12450276, from the Ministry of Education, Science, Sports and Culture of Japan.",

year = "2002",

month = feb,

doi = "10.1016/S0304-8853(01)00620-5",

language = "English",

volume = "239",

pages = "444--446",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

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TY - JOUR

T1 - Improvement of coercivity of anisotropic Nd-Fe-B HDDR powders by Ga addition

AU - Sugimoto, S.

AU - Murai, H.

AU - Koike, N.

AU - Nakamura, H.

AU - Book, D.

AU - Tezuka, N.

AU - Kagotani, T.

AU - Okada, M.

AU - Homma, M.

AU - Inomata, K.

N1 - Funding Information: This work has been supported in part by a Grant-in-Aid for Scientific Research on Priority Areas A of “New Protium Function” and No. 12450276, from the Ministry of Education, Science, Sports and Culture of Japan.

PY - 2002/2

Y1 - 2002/2

N2 - The effect of Ga addition on the increase of coercivity of HDDR-treated Nd-Fe-B powders was investigated. The Ga addition suppresses grain growth and may decrease the region where magnetocrystalline anisotropy is reduced. In addition, a heat treatment in which the hydrogen pressure was decreased in steps during the recombination reaction resulted in good magnetic properties of Br = 1.44T, jHc = 0.97MA m-1 and (BH)max = 308 kJm-3.

AB - The effect of Ga addition on the increase of coercivity of HDDR-treated Nd-Fe-B powders was investigated. The Ga addition suppresses grain growth and may decrease the region where magnetocrystalline anisotropy is reduced. In addition, a heat treatment in which the hydrogen pressure was decreased in steps during the recombination reaction resulted in good magnetic properties of Br = 1.44T, jHc = 0.97MA m-1 and (BH)max = 308 kJm-3.

KW - Anisotropy

KW - Coercivity

KW - Ga addition

KW - HDDR

KW - Hydrogen pressure

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U2 - 10.1016/S0304-8853(01)00620-5

DO - 10.1016/S0304-8853(01)00620-5

M3 - Article

AN - SCOPUS:0036465924

SN - 0304-8853

VL - 239

SP - 444

EP - 446

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-3

ER -

Improvement of coercivity of anisotropic Nd-Fe-B HDDR powders by Ga addition

Abstract

Keywords

ASJC Scopus subject areas

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