Magnetic properties of Nd-Fe-B thick-film magnets prepared by laser ablation technique

被引：28

作者：

Nakano, M ^{[1
]}

Tsutsumi, S ^{[1
]}

Fukunaga, H ^{[1
]}

机构：

[1] Nagasaki Univ, Dept Elect & Elect Engn, Nagasaki 8528521, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2002年 / 38卷 / 05期

关键词：

laser ablation technique; maximum energy products; Nd-Fe-B magnet; remanence;

D O I：

10.1109/TMAG.2002.803230

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nd-Fe-B film magnets were prepared by a laser ablation technique. The suppression of oxidation is a key point to obtain Nd-Fe-B film magnets with high coercivity. The following methods were used. 1) Ta substrates and a Ti sublimation pump as an auxiliary pump were used during deposition. 2) The composition of a target was set to Nd2.6Fe14B which included a larger amount of Nd compared with the stoichiometric composition of Nd2Fe14B. In addition, the distance between a target and a substrate was approximately 5 mm to ensure a high deposition rate. One-hour deposition using laser ablation technique enabled us to obtain Nd-Fe-B amorphous films with the thickness of approximately 50 mum. After annealing the films under an optimum condition, the coercivity and the remanence were more than 800 kA/m and approximately 0.6 T, respectively. In addition, the maximum energy product was 56 kJ/m(3).

引用

页码：2913 / 2915

页数：3