Effects of nanosize MgO additions to bulk Bi2.1Sr1.7CaCu2Ox

被引：58

作者：

Wei, W ^{[1
]}

Schwartz, J

Goretta, KC

Balachandran, U

Bhargava, A

机构：

[1] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[2] FSU, FAMU, Coll Engn, Dept Mech Engn, Tallahassee, FL 32310 USA

[3] Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA

[4] Univ Queensland, Brisbane, Qld 4072, Australia

来源：

PHYSICA C | 1998年 / 298卷 / 3-4期

关键词：

Bi-2212; nanosize MgO; flux pinning;

D O I：

10.1016/S0921-4534(97)01889-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nanosize MgO particles were added to Bi2.1Sr1.7CaCu2Ox (Bi-2212) powder in various molar fractions. Bulk samples were made from the MgO/Bi-2212 and heat treated by partial-melt processing. Scanning electron microscopy and energy-dispersive X-ray spectra were used to study the phases present in the samples. The effects of the MgO additions on the flux pinning behavior as a function of magnetic field and temperature were investigated by magnetization hysteresis measurements obtained with a SQUID magnetometer and a 33 T vibrating sample magnetometer. It was found that the nanosize MgO addition did not affect T-c of Bi-2212, while significantly expanding the magnetization hysteresis loops and increasing the irreversibility field. X-ray and SEM analysis suggested that MgO is inert with respect to Bi-2212. (C) 1998 Elsevier Science B.V.

引用

页码：279 / 288

页数：10

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