Magnetic and superconducting phase diagram of electron-doped Pr1-xLaCexCuO4
Magnetic and superconducting phase diagram of electron-doped Pr1-xLaCexCuO4
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DOI：
10.1103/physrevb.67.014514
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发表时间：
2002-03
影响因子：
3.7
通讯作者：
M. Fujita;T. Kubo;S. Kuroshima;T. Uefuji;K. Kawashima;K. Yamada;I. Watanabe;K. Nagamine
中科院分区：
文献类型：
--
作者：
M. Fujita;T. Kubo;S. Kuroshima;T. Uefuji;K. Kawashima;K. Yamada;I. Watanabe;K. Nagamine
利用零场介子自旋/弛豫和磁化率测量研究了电子掺杂${\ mathm {Pr}}_{1\ensuremath{-}x}{\ mathm {LaCe}}_{x}{\ mathm {CuO}}_{4}$的磁性和超导性。在低温下，在Cu自旋反铁磁（AF）阶为$xl~0.08$的样品中，观察到一个不受稀土矩影响的明确的μ子自旋。在Ce浓度为0.091 ~xl~0.20$的范围内，最大转变温度为26 K，发现了块体超导性。在$x\ensuremath{\sim}0.09$处，超导（SC）相的突然出现伴随着AF有序相的破坏，表明了两相之间的竞争关系。讨论了宽SC相与晶格间距之间的可能关系。
We have investigated the magnetism and the superconductivity of the electron-doped ${\mathrm{Pr}}_{1\ensuremath{-}x}{\mathrm{LaCe}}_{x}{\mathrm{CuO}}_{4}$ by means of zero-field muon spin rotation/relaxation and magnetic susceptibility measurements. At low temperatures, a well-defined muon spin rotation free from the effect of rare-earth moments was observed for samples with $xl~0.08$ corresponding to the antiferromagnetic (AF) order of Cu spins. Bulk superconductivity was identified in a wide Ce concentration range of $0.09l~xl~0.20$ with a maximum transition temperature of 26 K. Abrupt appearance of the superconducting (SC) phase at $x\ensuremath{\sim}0.09$ is concomitant with a destroy of the AF ordered phase, indicating the competitive relation between two phases. Possible relation between the wide SC phase and the lattice spacing is discussed.