Superconducting Properties of GdFeAsO at High Pressure
Journal of Superconductivity and Novel Magnetism, ISSN: 1557-1947, Vol: 29, Issue: 4, Page: 1105-1110
2016
- 7Citations
- 10Captures
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Article Description
We report hydrostatic pressure studies up to 5.3 GPa on pressure synthesized GdFeAsO polycrystalline sample by electrical resistivity, magnetic ac-susceptibility, and ac-specific heat measurements. The superconducting transition temperature (T) is suppressed dramatically from 53 K at ambient pressure to 36 K at 5.3 GPa. We find that the magnetic ordering temperature (T=2.4 K) of Gd sublattice determined by specific heat is nearly pressure independent. Also, the superconducting volume fraction estimated by ac-susceptibility data does not change in the pressure range studied. At ambient pressure, the specific heat jump at the TΔC/T = 18.3 mJ/mole K is comparable to that found in SmFeAsOF and SmFeAsO. At high pressure, the amplitude of the specific heat jump decreases together with the decrease of T and conforms with the universal scaling law of (Formula presented.) found in a number of 122 iron pnictide superconductors.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84957976619&origin=inward; http://dx.doi.org/10.1007/s10948-016-3382-9; http://link.springer.com/10.1007/s10948-016-3382-9; http://link.springer.com/content/pdf/10.1007/s10948-016-3382-9; http://link.springer.com/content/pdf/10.1007/s10948-016-3382-9.pdf; http://link.springer.com/article/10.1007/s10948-016-3382-9/fulltext.html; https://dx.doi.org/10.1007/s10948-016-3382-9; https://link.springer.com/article/10.1007/s10948-016-3382-9
Springer Science and Business Media LLC
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