Superconducting and normal state properties of Y_1−xPr_xNi₂B₂C

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• 作者：Narozhnyi ; V.N. ; Fuchs ; G. ; Freudenberger ; J. ; Nenkov ; K. ; M&uuml ; ller ; K.-H.
• 关键词：Borocarbides ; Substitution effects ; Electrical resistivity ; Magnetoresistance
• 刊名：Physica C
• 出版年：2001
• 期刊代码：80_09214534
• 类别：ms
• 出版时间：November, 2001
• 卷：364-365
• 期：Complete
• 页码：571-574
• 文件大小：112 K

摘要

Electrical resistivity, magnetoresistance and magnetic susceptibility have been studied for Y_1−xPr_xNi₂B₂C samples with 0≤x≤1.0. The increase of Pr concentration x results in a rapid suppression of superconductivity, |dT_c/dx|=35 K. No indication on superconductivity was observed for PrNi₂B₂C down to T=0.35 K. The absence of superconductivity for PrNi₂B₂C and the large superconductivity suppression rate |dT_c/dx| for Y_1−xPr_xNi₂B₂C correlate with the anomalously high Néel temperature of PrNi₂B₂C (T_Nmg align=center border=0 SRC=/images/glyphs/BQ4.GIF>4 K). Possible reasons for the absence of superconductivity in PrNi₂B₂C and the large |dT_c/dx| value for Y_1−xPr_xNi₂B₂C are discussed.