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首页> 外文期刊>Physica, B. Condensed Matter >Superconducting studies on the Ho(Ba2-yLay)Cu3Oz (0 <= y <= 0.5) system
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Superconducting studies on the Ho(Ba2-yLay)Cu3Oz (0 <= y <= 0.5) system

机译：Ho（Ba2-yLay）Cu3Oz（0 <= y <= 0.5）系统的超导研究

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Structural and superconducting properties of the Ho(Ba2-yLay)Cu3Oz system, with 0.0 less than or equal to y less than or equal to 0.5, have been investigated through neutron diffraction, resistivity and magnetization studies. It is observed that on increasing La in Ho(Ba2-yLay)Cu3Oz, the oxygen occupancy at the O(1) site (at 0, 1/2, 0 in space group Pmmm) decreases and that at the O(5) (1/2, 0, 0) site increases, resulting in a decrease in orthorhombicity. As Ba2+ is replaced by La3+, the oxygen content per formula unit increases beyond 7. The variation in the superconducting transition temperature, T-c, from similar to90 K for y = 0 to similar to26 K for y = 0.5 is attributed to hole filling/localization by La. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 2]
机译：通过中子衍射，电阻率和磁化研究，研究了Ho（Ba2-yLay）Cu3Oz体系的结构和超导性质，其中0.0小于或等于y小于或等于0.5。可以看出，随着Ho（Ba2-yLay）Cu3Oz中La的增加，O（1）位置（空间群Pmmm的0、1 / 2、0处）的氧占有率降低，而O（5）处的氧占有率降低（ 1 / 2、0、0）位置增加，导致正交性降低。当Ba2 +被La3 +取代时，每个分子式单元中的氧含量增加到7以上。超导转变温度Tc从y = 0的约90 K到y = 0.5的约26 K的变化归因于孔填充/定位由La。（C）2002 Elsevier Science BV保留所有权利。 [参考：2]

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