PREPARATION AND PROPERTIES OF YSR2CU3-XMXOY (M = LI, AL, TI, V, CR, FE, CO, GA, GE, MO, W AND RE)

被引：150

作者：

DEN, T

KOBAYASHI, T

机构：

[1] Canon Research Center, Atsugi-shi, Kanagawa, 243-01, Morinosato-Wakamiya

来源：

PHYSICA C | 1992年 / 196卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(92)90152-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the composition YSr2Cu3-xMxOy and obtained the 123-structure for M = Li, Al, Ti, V, Cr, Fe, Co, Ga, Ge, Mo, W and Re. Superconductivity is observed for the compounds with M = Ti, V, Fe, Co, Ga, Ge, Mo, W and Re at low levels of substitution content x. The highest T(c)zero is 73 K for the compound YSr2Cu2.85Re0.15O7.12. T(c)s are enhanced by decreasing x or increasing y, which draw the rise of hole concentration p(ave) (Cu2+p). Except for the compounds with M = V and Cr, the structures are tetragonal, while those of the compounds YSr2Cu3-xCrxOy are orthorhombic, and YSr2Cu3-xVxOy shows the structural transition from tetragonal to orthorhombic by HIP treatment with the simultaneous transition from superconductivity to metallic transport property. This Sr-based 123-structure is stabilized by doping elements with ionic radii=0.35-0.49 angstrom or 0.525-0.62 angstrom supposing 4- or 6-coordination, respectively, except for M = Li.

引用

页码：141 / 152

页数：12

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