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Critical currents in Tl-2122 and Y-124 sinters under high hydrostatic pressure

Diederichs, J. (author)
Reith, W. (author)
Sundqvist, Bertil (author)
Umeå universitet,Institutionen för fysik
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Niska, John (author)
Easterling, Kenneth E. (author)
Schilling, James S. (author)
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 (creator_code:org_t)
Bristol : Adam Hilger, 1991
1991
English.
In: Superconductor Science and Technology, volume 4, Special Issue 1S. - Bristol : Adam Hilger. - 0750301082 ; , s. S97-S99
  • Conference paper (peer-reviewed)
Abstract Subject headings
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  • Utilizing AC susceptibility measurements the authors have investigated the inter and intragranular properties of selected bulk materials under hydrostatic pressures to 3.5 GPa. A single phase Tl2CaBa2Cu2O8 sample with superconducting transition temperature Tc approximately=107 K shows a clear maximum in Tc(P) at approximately 2.2 GPa coupled with a nearly twofold increase to 3 GPa of the intergranular critical current density JcJ near Tc. The second sample, a YBa2Cu4O8 sinter, shows a large linear increase in Tc with pressure (+5.5 K/GPa) as well as a fivefold increase JcJ to 3 GPa. Applying a critical state model, the authors find that Tc(P) varies as lambda g-2(P), where lambda g is the intragranular (London) penetration depth.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Keyword

Superconductors
superconductivity
high transition temperature superconductors
Hi-Tc
HTS
sintered ceramic
Tl-2122
Y-124
YBa2Cu4O8
critical current density
inductive measurements
high pressure
penetration depth
critical temperature
Condensed matter physics
Kondenserade materiens fysik
Superconductivity
Supraledning
fysik
Physics

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