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Preparation and Studies of Thin Films of Cu-doped GdSr2RuCu2O8

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Abstract

Preparation of superconducting thin films of the Cu-doped Ruthenocuprate superconductor GdSr2Ru0.9Cu2.1O8 has been attempted by pulsed laser deposition method. Thin films were deposited on different substrates employing different laser ablation parameters with the idea of obtaining good-quality films which exhibit superconductivity. The crystal structure and morphology of the thin films were characterized by X-ray diffraction and scanning electron microscopy measurements and optical characteristics by Raman scattering measurements. High-temperature ex situ oxygen annealing led to the formation of homogeneous films with the occurrence of an onset of superconductivity, traced by electrical resistivity measurements. Increasing the annealing time has led to a systematic improvement in the sample quality and the physical properties. However, prolonged high-temperature annealing seems to cause deterioration in properties as seen from electrical resistivity and Raman scattering measurements. The studies reveal the importance of an optimal high-temperature oxygen annealing procedure to induce superconductivity in thin films of this Ruthenocuprate system.

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Acknowledgments

The authors acknowledge Dr. A. K. Sinha and Mr. Manvendra Narayan Singh for their support in carrying out Synchrotron X-ray diffraction measurements at RRCAT, Indore.

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Authors and Affiliations

  1. Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, India

    M. Subramani, T. Geetha Kumary, N. Radhikesh Raveendran, R. Rajaraman, R. Pandian, R. M. Sarguna & Awadhesh Mani

  2. Department of Physics, V.H.N.S.N College, Virudhunagar, 626 001, India

    M. Subramani & N. Jeyakumaran

  3. HBNI, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, India

    N. Radhikesh Raveendran, R. Rajaraman, R. M. Sarguna & Awadhesh Mani

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  1. M. Subramani
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Correspondence to T. Geetha Kumary.

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Subramani, M., Kumary, T.G., Raveendran, N.R. et al. Preparation and Studies of Thin Films of Cu-doped GdSr2RuCu2O8. J Supercond Nov Magn 32, 2811–2817 (2019). https://doi.org/10.1007/s10948-019-5048-x

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  • DOI: https://doi.org/10.1007/s10948-019-5048-x

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