SUBSTITUTION EFFECTS OF FE AND ZN FOR CU IN YBA2(CU1-XMX)4O8

被引：8
|
作者：
MEEN, TH [1 ]
CHEN, YC [1 ]
LIAW, KW [1 ]
JUANG, FL [1 ]
YANG, HD [1 ]
机构：
[1] NATL SUN YAT SEN UNIV,DEPT PHYS,KAOHSIUNG 80424,TAIWAN
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1993年 / 32卷 / 10期
关键词：
SUBSTITUTION EFFECT; YBA2(CU1-XMX)4O8; THERMAL STABILITY; MAGNETISM;
D O I：
10.1143/JJAP.32.4503
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
YBa2(Cu1-xMx)408(M=Fe, Zn; x=O to 0.05) has been investigated by means of X-ray diffraction, thermogravimetric analysis, electrical resistivity and magnetic susceptibility measurements. X-ray diffraction patterns show that all samples contain the nearly single YBa2Cu4O8 phase. The results of structural analysis indicate that the orthorhombic-to-tetragonal transition occurs at about x=0.03 for M=Fe, whereas the structure remains orthorhombic until x=0.05 for M=Zn. Thermal stability is reduced with increasing Fe concentration, but is nearly unchanged in the case of Zn substitution. The suppressed rates of T(co) with increasing dopant content are 17.81 K/at. % and 15.69 K/at. % for Fe and Zn. Effective magnetic moments of YBa2(Cu1-xFex)408 are 5.99, 5.63 and 5.37 mu(B) for x=0.01, 0.03 and 0.05, respectively. In addition, the similarities and differences between YBa2(Cu1-xMx)4O8 and YBa2(Cu1-xMx)3O7-y are discussed.
引用
收藏
页码：4503 / 4508
页数：6
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