LANTHANUM AND CALCIUM-DOPED YBA2CU3OY FILMS GROWN AT LOW-TEMPERATURE AND PRESSURE

被引：7

作者：

APPELBOOM, HM ^{[1
]}

SATO, H ^{[1
]}

NAITO, M ^{[1
]}

机构：

[1] NIPPON TELEGRAPH & TEL PUBL CORP, BASIC RES LABS, ATSUGI, KANAGAWA 24301, JAPAN

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1994年 / 221卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90674-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated lanthanum and calcium doped YBa2Cu3Oy films with co-evaporation at low oxygen/ozone pressures according to the stoichiometric formulae YLaxBa2-xCu3Oy and Y1-xCaxBa2Cu3Oy. The lanthanum doped films show a strong reduction or absence of solid solubility of lanthanum on the barium site compared to bulk material made at atmospheric oxygen pressure, analogous to what has been reported previously for Sm1+xBa2-xCu3Oy films [Physica C 214 (1993) 323]. In the calcium doped films we find a solid solubility limit which is apparently similar to that reported for bulk material synthesized at atmospheric oxygen pressure. The reduction of solid solubility in the YLaxBa2-xCu3Oy system is explained by a shift of the low oxygen pressure decomposition line to higher pressure with lanthanum doping. We also report here on the successful synthesis of oxygen-deficient superconducting Y1-xCaxBa2Cu3O6 films.

引用

页码：125 / 135

页数：11

共 24 条

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