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Effects of Oxygen Deficiency on ESR of Mn2+ Ions Substituted in YBa2Cu3O7-δ Superconductors

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Advances in Superconductivity XI

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Abstract

Effects of oxygen deficiency on the spin dynamics of correlating Mn spins and quasiparticles are investigated by ESR of Mn2+ ions doped in YBa2Cu3O7-δ. The ESR linewidth for oxygen depleted sample increases linearly with temperature with smaller coefficient than oxygen rich sample, corresponding to reduced density of states (Korringa mechanism). The spectroscopic g factor tends to approach towards orthorhombic Cu2+ value of 2.1 from Mn2+ free ionic value of 2.0 along with oxygen reduction, suggesting tendency towards bottlenecking. The effective spins for the Mn2+ ions were observed to diminish exponentially at low temperatures with gap formation for spin excitation.

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References

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Authors and Affiliations

  1. Department of Applied Physics, Faculty of Science, Fukuoka University, Fukuoka, 814-0180, Japan

    Chihiro Taka, Akihiko Nishida & Kazumi Horai

Authors
  1. Chihiro Taka
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  2. Akihiko Nishida
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  3. Kazumi Horai
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Editors and Affiliations

  1. Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo, 135-0062, Japan

    Naoki Koshizuka (Deputy Director General, Director, Division 1) & Setsuko Tajima (Director, Division 2) (Deputy Director General, Director, Division 1) &  (Director, Division 2)

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© 1999 Springer Japan

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Taka, C., Nishida, A., Horai, K. (1999). Effects of Oxygen Deficiency on ESR of Mn2+ Ions Substituted in YBa2Cu3O7-δ Superconductors. In: Koshizuka, N., Tajima, S. (eds) Advances in Superconductivity XI. Springer, Tokyo. https://doi.org/10.1007/978-4-431-66874-9_19

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  • DOI: https://doi.org/10.1007/978-4-431-66874-9_19

  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-66876-3

  • Online ISBN: 978-4-431-66874-9

  • eBook Packages: Springer Book Archive

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