EFFECTS OF OXYGEN ON THE MELTING AND FREEZING OF BI2SR2CA1CU2O8+DELTA

被引：15

作者：

POLONKA, J ^{[1
]}

XU, M ^{[1
]}

GOLDMAN, AI ^{[1
]}

FINNEMORE, DK ^{[1
]}

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011

来源：

JOURNAL OF APPLIED PHYSICS | 1993年 / 74卷 / 12期

关键词：

D O I：

10.1063/1.355009

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Crystallization of Bi2Sr2Ca1Cu2O8+delta has been studied as a function of the partial pressure of oxygen, using in situ high temperature x-ray measurements, in order to determine the phases that form and the kinetics of growth. As the partial pressure of oxygen is systematically reduced, the dominant second phase changes from (Sr,Ca)2Cu1O3 at 150 Torr of oxygen, to (Sr,Ca)1Cu1O2 at 15 Torr of oxygen, to CaO in a pure nitrogen atmosphere. Normally, in 150 Torr of oxygen, Bi2Sr2Cu1O6+delta is the first Bi cuprate to form from the melt but if the oxygen partial pressure is reduced to 75 Torr, then Bi2Sr2Ca1Cu2O8+delta is favored due to the decreased amount of 2:1 phase in the melt.

引用

页码：7397 / 7401

页数：5

共 9 条

[1]

HELLSTROM EE, COMMUNICATION

[2]

HOLESINGER T, 1993, THESIS IOWA STATE U

[3]

KASE J, 1989, APPL PHYS LETT, V25, P54

[4]

MAJEWSKI P, 1992, ADV MAT, V27, P374