Skip to main content
SpringerLink
Log in

Direct evidence for the decomposition of YBa2Cu3O7−x into orthorhombic and tetragonal phases at 200°C

  • Rapid Communications
  • Published:
Pramana Aims and scope Submit manuscript

Abstract

The variations of room temperature resistivity (ρ 300), powder a.c. susceptibility (χ′) and x-ray diffraction (XRD) line profiles of (013), (103) and (110); (003), (010) and (100) reflections in the step scanning mode were investigated on single phase samples of Y1Ba2Cu3O7−x (YBCO), as a function of ageing at 200°C up to 860 h. The average off-stoichiometryx=0.22 remained constant throughout the experiment.ρ 300 showed a monotonic increase while the superconducting transition curves showed increasing sharpening with ageing time. XRD of the reflections investigated developed satellite structures or additional intensities at 2θ values different from those of main reflections. The results are consistent with the prediction and earlier observation of the decomposition of the off-stoichiometric YBCO into oxygen ordered orthorhombic and vacancy ordered tetragonal phases.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Baskaran R, Hariharan Y, Janawadkar M P and Radhakrishnan T S 1989Physica C156 720

    Google Scholar 

  • Bharathi A, Hariharan Y, Sood A K, Sankara Sastry V, Janawadkar M P and Sundar C S 1988Europhys. Lett. 6 369

    Article  ADS  Google Scholar 

  • Blinovskov Ya N, Kozhevnikov V L, Leonidov I A, Cheshnitsky S M, Berger I F, Voronin V I, Goshchitsky B N, Davydov S A, Karkhin A E and Mirmel-Shtein A V 1988Problems of high temperature super-conductivity, Komi Scientific Centre and Sverdlovk Scientific Centre of the Ural Branch, USSR Academy of Science, issue 9, p. 24

  • Cava J R, Batlogg B and Chen C H 1987Phys. Rev. B36 5719

    ADS  Google Scholar 

  • Chen C H, Werder D J, Schneemeyer L F, Gallagher P K and Waszczak J V 1988Phys. Rev. B38 2888

    ADS  Google Scholar 

  • Govinda Rajan K, Parameswaran P, Janaki J and Radhakrishnan T S 1989 (to be published)

  • Hariharan Y, Janawadkar M P and Radhakrishnan T S 1979Pramāna — J. Phys. 31 117

    Google Scholar 

  • Hariharan Y 1988aSolid State Phys. (India) Vol. 31-C (to appear)

  • Hariharan Y, Janawadkar M P, Sankara Sastry V and Radhakrishnan T S 1988bPramāna — J. Phys. 31 L59

  • Hariharan Y, Sundar C S, Janaki J, Sood A K, Janawadkar M P, Bharathi A, Sankara Sastry V, Baskaran R and Radhakrishnan T S 1989High temperature superconductors (ed.) A V Narlikar (New York: Nova Scientific Publishers Inc.)

    Google Scholar 

  • Jorgensen J D, Shaked H, Hinks D G, Dabrowski D, Veal B W, Paulikas A P, Nowicki L J, Crabtree G W, Kwok W K and Nunez L H 1988Physica C153–155 578

    Google Scholar 

  • Khachaturyan A G and Morris J W Jr 1987Phys. Rev. Lett. 59 2776

    Article  ADS  Google Scholar 

  • Khachaturyan A G and Morris J W Jr 1988Phys. Rev. Lett. 61 215

    Article  ADS  Google Scholar 

  • Kishio K, Shimoyoma J and Hasegawa T 1987Jpn. J. Appl. Phys. 26 1228

    Article  ADS  Google Scholar 

  • Kupfer H, Apfelstedt I, Flukiger R, Keller C, Meier Hirmer T, Runtsch B, Turovski A, Wisch U and Wolf T 1988Cryogenics 28 650

    Article  ADS  Google Scholar 

  • Mydosh J A 1987Z. Phys. B68 1

    Article  Google Scholar 

  • Pankajavalli R, Janaki J, Sreedharan O M, Gnanamoorthy J B, Rao G V N, Sankara Sastry V, Janawadkar M P, Hariharan Y and Radhakrishnan T S 1988Physica C156 737

    ADS  Google Scholar 

  • Sood A K, Sankaran K, Sankara Sastry V, Janawadkar M P, Sundar C S, Janaki J, Vijayalakshmi S and Hariharan Y 1988Physica C156 720

    ADS  Google Scholar 

  • Werder D J, Chen C H, Cava R J and Batlogg B 1988Phys. Rev. B38 5130

    ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

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

    T S Radhakrishnan, J Janaki, G V. N Rao, S Kalavathi, V S Sastry, Y Hariharan, M P Janawadkar, K Govinda Rajan, P Parameswaran & O M Sreedharan

  2. Metallurgy Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India

    P Parameswaran & O M Sreedharan

Authors
  1. T S Radhakrishnan
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J Janaki
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. G V. N Rao
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. S Kalavathi
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. V S Sastry
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Y Hariharan
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. M P Janawadkar
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. K Govinda Rajan
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. P Parameswaran
    View author publications

    You can also search for this author in PubMed Google Scholar

  10. O M Sreedharan
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Radhakrishnan, T.S., Janaki, J., Rao, G.V.N. et al. Direct evidence for the decomposition of YBa2Cu3O7−x into orthorhombic and tetragonal phases at 200°C. Pramana - J. Phys. 32, L705–L713 (1989). https://doi.org/10.1007/BF02847392

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02847392

Keywords

PACS Nos

Search

Navigation