Enhancement of coercivity for Nd-Fe-B thin films by the infiltration of Nd-Cu alloy cap layer

被引：21
|
作者：
Sato, T. [2 ]
Oka, N. [1 ]
Ohsuna, T. [2 ]
Kaneko, Y. [2 ]
Suzuki, S. [1 ]
Shima, T. [1 ]
机构：
[1] Tohoku Gakuin Univ, Fac Engn, Tagajo, Miyagi 9858537, Japan
[2] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2011年 / 110卷 / 02期
关键词：
PERMANENT-MAGNETS;
D O I：
10.1063/1.3608244
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In order to understand the mechanism of coercivity (H-c) of Nd-Fe-B magnets, we have investigated the effect of thermal annealing treatment on Nd-Fe-B thin films with Nd-Cu alloy cap layers. A substantial enhancement of H-c from 19.0 kOe (1512 kAm(-1)) to 26.1 kOe (2078 kAm(-1)) was obtained for the Nd-Fe-B/Nd36Cu64 films after post-annealing at 400 degrees C. Through electron microscope observation, it was revealed that Nd and Cu enrichment is clearly observed in the grain boundary of the Nd-Fe-B layer, whereas the concentration of Fe was decreased there. These results suggest that the exchange coupling between Nd2Fe14B grains is weakened by the infiltration of a non-magnetic element into the grain boundary after the optimum thermal annealing treatment. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3608244]
引用
收藏
页数：4
相关论文
共 50 条
  • [1] Improvement of Coercivity of Nd-Fe-B Powder by Nd-Cu Sputtering
    Iijima, Ami
    Matsuura, Masashi
    Tezuka, Nobuki
    Sugimoto, Satoshi
    Une, Yasuhiro
    Kubo, Hirokazu
    Sagawa, Masato
    [J]. MATERIALS TRANSACTIONS, 2017, 58 (05) : 825 - 828
  • [2] Coercivity enhancement in La coated Nd-Fe-B thin films
    Koike, Kunihiro
    Ishikawa, Hiroya
    Ogawa, Daisuke
    Kato, Hiroaki
    Miyazaki, Takamichi
    Ando, Yasuo
    Itakura, Masaru
    [J]. 20TH INTERNATIONAL CONFERENCE ON MAGNETISM, ICM 2015, 2015, 75 : 1294 - 1299
  • [3] Effect of Dy/Nd double layer on coercivity in Nd-Fe-B thin films
    Koike, K.
    Umezawa, J.
    Ishikawa, H.
    Ogawa, D.
    Mizuno, Y.
    Kato, H.
    Miyazaki, T.
    Ando, Y.
    [J]. JOURNAL OF APPLIED PHYSICS, 2014, 115 (17)
  • [4] Dipolar energies in Nd-Fe-B nanocrystalline magnets with and without Nd-Cu infiltration
    Ohtori, Hiroyuki
    Iwano, Kaoru
    Mitsumata, Chiharu
    Yano, Masao
    Kato, Akira
    Shoji, Tetsuya
    Manabe, Akira
    Ono, Kanta
    [J]. JOURNAL OF APPLIED PHYSICS, 2015, 117 (17)
  • [5] Dipolar energies in Nd-Fe-B nanocrystalline magnets with and without Nd-Cu infiltration
    [J]. 1600, American Institute of Physics Inc. (117):
  • [6] Magnetic Domain Observation of Nd-Fe-B/Nd-Cu Thin Films Deposited on Si Substrate
    Shima, Toshiyuki
    Sato, Kohtaro
    Mishina, Yuriko
    Ohtsuki, Tomoyuki
    Iwama, Hiroki
    [J]. JOURNAL OF THE JAPAN INSTITUTE OF METALS, 2012, 76 (01) : 52 - 58
  • [7] Microstructure and Magnetic Properties of High Coercivity Die-Upset Nd-Fe-B Magnets by Nd-Cu Alloy Addition
    Du, Xiao
    Jing, Zheng
    Han, Rui
    Guo, Zhaohui
    Zhu, Minggang
    Li, Wei
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 2015, 51 (11)
  • [8] Influence of Nd Oxide Phase on the Coercivity of Nd-Fe-B Thin Films
    Matsuura, Masashi
    Goto, Ryota
    Tezuka, Nobuki
    Sugimoto, Satoshi
    [J]. MATERIALS TRANSACTIONS, 2010, 51 (10) : 1901 - 1904
  • [9] Coercivity enhancement of hydrogenation-disproportionation-desorption-recombination processed Nd-Fe-B powders by the diffusion of Nd-Cu eutectic alloys
    Sepehri-Amin, H.
    Ohkubo, T.
    Nishiuchi, T.
    Hirosawa, S.
    Hono, K.
    [J]. SCRIPTA MATERIALIA, 2010, 63 (11) : 1124 - 1127
  • [10] Coercivity enhancement of hot-deformed Ce-Fe-B magnets by grain boundary infiltration of Nd-Cu eutectic alloy
    Tang, Xin
    Sepehri-Amin, H.
    Ohkubo, T.
    Yano, M.
    Ito, M.
    Kato, A.
    Sakuma, N.
    Shoji, T.
    Schrefl, T.
    Hono, K.
    [J]. ACTA MATERIALIA, 2018, 144 : 884 - 895
12345