Magnetoresistance and magnetization of melt-spun Dy-Cu alloys

被引：9
|
作者：
Muller, KH [1 ]
Idzikowski, B [1 ]
Eckert, D [1 ]
Nenkov, K [1 ]
Engelmann, HJ [1 ]
Teresiak, A [1 ]
Wolf, M [1 ]
机构：
[1] POLISH ACAD SCI, INST MOL PHYS, POZNAN, POLAND
来源：
IEEE TRANSACTIONS ON MAGNETICS | 1997年 / 33卷 / 05期
关键词：
D O I：
10.1109/20.619499
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：
At low temperatures melt-spun and subsequently annealed ribbons with the nominal composition DyxCu100-x (x < 20) show a remarkable magnetoresistance ratio which is negative and isotropic. This effect is caused by the cubic DyCu5 phase with the AuBe5-type structure. Below a critical temperature T-m approximate to 7K this phase is metamagnetic. Between T-m and T-c approximate to 14.5K it shows a spontaneous magnetization i.e. it is ferromagnetic. The hexagonal DyCu7 phase (TbCu7-type structure) is ferromagnetic with a Curie temperature of about 18K. This 1:7 phase as well as the lamellar Cu/DyCu5 microstructure caused by the eutectoid decomposition of DyCu7 do not result in a large magnetoresistance of the ribbons.
引用
收藏
页码：3565 / 3567
页数：3
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