SUPERCONDUCTIVITY AND MAGNETIC ORDER IN THE CU(2) PLANES IN FE-DOPED YBA2CU4O8

被引:30
作者
FELNER, I
NOWIK, I
BROSH, B
HECHEL, D
BAUMINGER, ER
机构
[1] Racah Institute of Physics, The Hebrew University
来源
PHYSICAL REVIEW B | 1991年 / 43卷 / 10期
关键词
D O I
10.1103/PhysRevB.43.8737
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Mossbauer spectroscopy, magnetic susceptibility, and powder x-ray-diffraction measurements were used to study superconductivity and magnetic order in YBa2(Cu(1-x)Fe(x))4O8+sigma. T(c) is reduced with increasing Fe concentration and superconductivity is totally depressed for x greater-than-or-equal-to 0.04. The Mossbauer spectra show that at concentrations where superconductivity disappears magnetic order, probably antiferromagnetism, is formed in the Cu(2) site. The phase diagram obtained is similar to those previously obtained for Y(1-x)Pr(x)Ba2(Cu(1-y)Fe(y))3O7+sigma [I. Felner et al., Phys. Rev. Lett. 65, 1945 (1990)]. In the superconducting region Fe atoms occupy only the Cu(1) sites and the Fe-57 Mossbauer spectrum contains only one doublet.
引用
收藏
页码:8737 / 8740
页数:4
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