Interface state and coercivity in Nd-Fe-B/Dy films

被引：1
|
作者：
Umezawa, Jin [1 ]
Sakai, Yoshiki [1 ]
Koike, Kunihiro [1 ]
Ogawa, Daisuke [1 ]
Mizuno, Yoshiyuki [1 ]
Kato, Hiroaki [1 ]
Miyazaki, Takamichi [2 ]
Ando, Yasuo [2 ]
机构：
[1] Yamagata Univ, Grad Sch Sceince & Engn, Yonezawa, Yamagata 9928510, Japan
[2] Tohoku Univ, Grad Sch Engn, Sendai, Miyagi 9808579, Japan
来源：
JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2013年 / 63卷 / 03期
基金：
日本学术振兴会; 日本科学技术振兴机构;
关键词：
Nd2Fe14B; Dy; Coercivity; Thin films;
D O I：
10.3938/jkps.63.616
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We fabricated a model interface system, which consised of a Nd2Fe14B layer with Dy overlayers, in order to study the relationship between the microstructure near the interface and the coercivity. The coercivity H (c) of the 1-A mu m-thick Nd-Fe-B films with a Dy overlayer was enhanced by thermal diffusion of Dy atoms from the film's surface into the Nd-Fe-B layer. The Nd-Fe-B/Dy films annealed at 700 A degrees C showed a significant increase in the H (c) of up to about 17 kOe. The maximum increase in the value of the coercivity Delta H (c) of the annealed films with a Dy overlayer was approximately 13 kOe. The XRD measurement suggested the existence of rare-earth oxides (NdO and Dy2O3) in the Dy-coated films with high value of the Delta H (c) .
引用
收藏
页码：616 / 619
页数：4
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