Effect of heat treatments on the physical properties of YBa2(Cu1-xFex)3Oy

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作者：
Katsuyama, S. [1 ]
Majima, K. [1 ]
Nagai, H. [1 ]
Kosuge, K. [1 ]
机构：
[1] Osaka Univ, Osaka, Japan
来源：
| 1600年 / 193期
关键词：
Crystal structure - Heat treatment - Magnetic properties - Physical properties - Thermal effects - Yttrium compounds;
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摘要：
YBa2(Cu1-xFex)3Oy was prepared by two kinds of heat treatments. The synthesized samples were slowly cooled from 890 °C in air. Some of them were annealed below 400 °C in O2 gas (sample [O]s). The others were heated at 800 °C in N2 gas followed by annealing below 400 °C in O2 gas (sample [NO]s. The crystal structure, superconducting and magnetic properties were examined by X-ray diffraction, electrical resistivity and superconducting quantum interference device (SQUID) measurements. These physical properties of the specimens are strongly affected by the heat treatments. This seems to be due to the change in microscopic structure, e.g. the distribution of substituted Fe atoms, caused by the heat treatments.
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