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Mössbauer study of super and semi-conducting samples of57Fe-doped (La2−y Sr y ) CuO4−δ

  • Superconductors
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Abstract

From Mössbauer and resistivity measurements on (La2−y Sr y ) CuO4−δ samples doped with 5/100057Fe, three successive phases are observed depending on they value: a semiconducting antiferromagnetic phase fory<0.02; a semiconducting phase with two-dimensional spin-glass Cu magnetic order for 0.02<y<0.07; and a superconducting phase fory>0.07. The Mössbauer data show that a Cu spin-glass order survives in the superconducting phase up toy∼0.15. Fory>0.15, a different type of magnetic ordering is observed on57Fe, which is clearly governed by the iron impurities interacting through the Cu sublattice.

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Authors and Affiliations

  1. Service de Physique du Solide, C.E.N. Saclay, 91191, Gif-sur-Yvette cedex, France

    P. Imbert, G. Jehanno & J. A. Hodges

  2. Service de Résonance Magnétique, C.E.N. Saclay, 91191, Gif-sur-Yvette cedex, France

    P. Imbert, G. Jehanno & J. A. Hodges

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  1. P. Imbert
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  2. G. Jehanno
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  3. J. A. Hodges
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Imbert, P., Jehanno, G. & Hodges, J.A. Mössbauer study of super and semi-conducting samples of57Fe-doped (La2−y Sr y ) CuO4−δ . Hyperfine Interact 50, 599–605 (1989). https://doi.org/10.1007/BF02407697

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