μ+SR studies on superconducting YBa2(Cu1?xFex)3Oy system |
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| Authors: | S Okuma H Miyatake N Nishida Y Ueda S Katsuyama K Kosuge J H Brewer |
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| Institution: | (1) Dept. of Physics, Tokyo Institute of Technology, Meguro-ku, 152 Tokyo, Japan;(2) The Institute for Solid State Physics, Univ. of Tokyo, Minato-ku, 106 Tokyo, Japan;(3) Dept. of Chemistry, Kyoto University, 606 Kyoto, Japan;(4) Canadian Institute for Advanced Research and Dept. of Physics, Univ. of British Columbia, V6T 2A3 Vancouver, B.C., Canada |
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| Abstract: | Spin-glass like magnetic ordering of iron moments was observed in both orthorhombic and tetragonal YBa2(Cu1−xFex)3Oy (x=0.08) by μ+SR measurements. In a “Tetra” sample, all the muons sense the superconducting transition at 60 K and magnetic ordering at
around 15 K, while in an “Ortho” sample they reveal that two magnetically different parts exist in the sample: about 40% of
the sample is superconducting withT
c
≈90K and the remaining part is magnetic withT
M≈33K. These phenomena can be explained in terms of clustering of the Fe atoms in the “Ortho” sample. |
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