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    题名: Location of the superconducting hole condensate in Sr2YRu1−uCuuO6 by μ+SR
    作者: Harshman, D. R.;Kossler,W. J.;Greer, A. J.;Stronach, C. E.;Koster, E.;Hitti, B.;Wu, M. K.;Chen, D. Y.;錢凡之;Chien, F. Z.;Blackstead, H. A.;Dow, John D.
    贡献者: 淡江大學物理學系
    日期: 2000-08
    上传时间: 2013-07-09 15:15:25 (UTC+8)
    出版者: Amsterdam: Elsevier BV * North-Holland
    摘要: The magnetic and superconducting characteristics of sintered Sr2YRu1-uCuuO6 (for /u=0.05, 0.10, 0.15) were probed using transverse- and zero-field muon-spin rotation (μ+SR). Since positive muons are attracted to oxygen ions in the high-TC oxides, Sr2YRu1-uCuuO6 should (and does) present two types of μ+ sites, one in the YRuO4 layers and the other in the SrO layers. The transverse- and zero-field μSR spectra for all three stoichiometries exhibit magnetic ordering at and below TN ~ 30K, with a static local field of ~3kG. This transition is marked by a dramatic increase in the μ+ spin relaxation rate as the temperature decreases below TN, corresponding to an increased static disordering of the magnetic moments. Above TN no static fields are observed. Instead, the data exhibit a slow dynamic depolarization, presumably due to rapid fluctuation of magnetic moments. Both transverse- and zero-field data also indicate a smaller second component (~10%) that we associate with the SrO layer, exhibiting superconducting behavior in transverse field with an observed bulk TC~TN~30K.
    關聯: Physica B: Condensed Matter 289-290, pp.360-364
    DOI: 10.1016/S0921-4526(00)00411-7
    显示于类别:[物理學系暨研究所] 期刊論文


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