IN-SITU HRPD STUDY OF SUPERSTRUCTURE OII PHASE IN POLYCRYSTALLINE SAMPLES OF YBCOX AT 300OC

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KHOSHNEVISAN B.; MOHAMMADI M.

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2015 | Volume:22 | Issue:4 Page(s): 97-102

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Title

IN-SITU HRPD STUDY OF SUPERSTRUCTURE OII PHASE IN POLYCRYSTALLINE SAMPLES OF YBCOX AT 300OC

Author(s)

KHOSHNEVISAN B. | MOHAMMADI M. | Issue Writer Certificate

Keywords

HTC SUPERCONDUCTORQ2

SUPER STRUCTUREQ2

PHASE TRANSITIONQ3

SYNCHROTRON RADIATIONQ2

NEUTRON DIFFRACTIONQ2

Abstract

Superstructure orthorhombicII (OII) phase in polycrystalline samples of YBCOx was observed by using synchrotron in-situ high resolution powder diffraction (HRPD) techniques at 3000C. Rietveld method (RM) refinement was employed to analyse the collected diffraction data under proper oxygen partial pressure atmospheres. Our study indicates that by oxygen uptake, the samples undergo structural PHASE TRANSITION from initial tetragonal phase to the superstructure OII phase with x »0.6. According to our previous study this transition follows 1st order Gibbs lever role. Evidence for exsistence of dominated OII superstructure in powder samples at 300oC, makes a valuable correction on the YBCOx’s structural phase diagram, which has been historically controversial and also would be interesting for applications.

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APA: Copy

KHOSHNEVISAN, B., & MOHAMMADI, M.. (2015). IN-SITU HRPD STUDY OF SUPERSTRUCTURE OII PHASE IN POLYCRYSTALLINE SAMPLES OF YBCO_X AT 300^OC. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 22(4), 97-102. SID. https://sid.ir/paper/3927/en

Vancouver: Copy

KHOSHNEVISAN B., MOHAMMADI M.. IN-SITU HRPD STUDY OF SUPERSTRUCTURE OII PHASE IN POLYCRYSTALLINE SAMPLES OF YBCO_X AT 300^OC. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2015;22(4):97-102. Available from: https://sid.ir/paper/3927/en

IEEE: Copy

B. KHOSHNEVISAN, and M. MOHAMMADI, “IN-SITU HRPD STUDY OF SUPERSTRUCTURE OII PHASE IN POLYCRYSTALLINE SAMPLES OF YBCO_X AT 300^OC,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 22, no. 4, pp. 97–102, 2015, [Online]. Available: https://sid.ir/paper/3927/en

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