## 摘要

The pressure effect on the superconducting transition temperature (dT _{c}/dP) has been measured for Dy_{1-x}Pr_{x}Ba _{2}Cu_{3}O_{7-δ} with x=0, 0.02, 0.05, 0.1, 0.15, 0.2, and 0.3. Although the T_{c} suppression by Pr is in a different fashion for Y_{1-x}Pr_{x}Ba_{2}Cu_{3}O _{7-δ} and Dy_{1-x}Pr_{x}Ba_{2}Cu _{3}O_{7-δ}, the dT_{c}/dP is similar in these two systems, with respect to x. The measured dT_{c}/dP is positive at small x but becomes negative for x≥0.2 which is associated with the pressure effect on the normal-state resistivity (1/R)(dR/dP). The positive (1/R)(dR/dP) at x≥0.2 indicates that the number of carriers is decreasing under pressure and it supports the picture of hole localization through the hybridization of Pr-4f and O-2p bands. The mechanical pressure has a negative effect on T _{c} for x≥0.2, but chemical pressure has a positive effect on T _{c} according to the results of chemical substitution. This suggests that the large R (=rare earth element) may possibly reduce the Pr-O distance, and increase the hybridization of Pr-4f and O-2p bands.

原文 | English |
---|---|

頁（從 - 到） | 5871-5873 |

頁數 | 3 |

期刊 | Journal of Applied Physics |

卷 | 73 |

發行號 | 10 |

DOIs | |

出版狀態 | Published - 1993 |

## All Science Journal Classification (ASJC) codes

- 物理與天文學 (全部)

## 指紋

深入研究「Pressure effect on the superconducting transition temperature of Dy_{1-x}Pr

_{x}Ba

_{2}Cu

_{3}O

_{7-δ}」主題。共同形成了獨特的指紋。