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Showing 1 to 10 of 10 for “"yttrium barium copper oxide"”.
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Nuclear magnetic resonance studies of yttrium barium copper oxide in the superconducting state
In this thesis we report measurements of the $\sp{63}$Cu Knight shift in the superconducting state for the plane (Cu(2)) and chain (Cu(1)) sites in YBa$\sb2$Cu$\sb3$O$\sb7$. We also have measured the temperature and field dependent $\sp{63}$Cu(2) nuclear spin relaxation rates ($\sp{63}$W1$\alpha$) …
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Electrical and magnetic properties of twin-free single-crystal praseodymium-doped yttrium barium copper oxide
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:06:40Z Item is restricted indefinitely.
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Experimental determination of the symmetry of the superconducting pairing state in yttrium barium copper oxide
In this thesis I present measurements of bimetallic Pb-Au-YBCO dc SQUIDs (Superconducting QUantum Interference Devices) and Josephson junctions that provide an important clue to the origin of the pairing mechanism for high temperature superconductivity in the cuprates. By probing the momentum space …
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The doping and magnetic field dependence of the heat capacity of yttrium barium copper oxide superconductors
This is a report of a series of measurements made on the doping effects in reduced oxygen content YBa2Cu3O7-x. The two most remarkable findings are: 1) there is a rapid decrease of the amplitude of the heat capacity anomaly with the reduction of the oxygen content and 2) the magnitude of the …
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Verification of d-wave pairing symmetry by microwave intermodulation distortion measurements in yttrium barium copper oxide
… in high quality pulsed laser deposition (PLD) Yttrium Barium Copper Oxide (YBCO) on LaAlO3 substrate. A low-temperature (T < 30 K) increase in IMD is the observation of an upturn of the nonlinear coefficient of the quadratic field dependence of the penetration depth. This IMD upturn is limited …
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Nuclear Magnetic Resonance Studies of the Effect of Vortices on the High Temperature Superconductor Yttrium Barium Copper Oxide
… line. The Volovik Effect was observed in both copper and oxygen in the plane of YBa2Cu3O7. The Volovik Effect was not able to be observed with sufficient precision to discriminate between various theories because it was obscured by other physical mechanisms within the sample studied.
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Planar Tunneling and Andreev Bound State Spectroscopy of Yttrium Barium Copper Oxide Thin Films Using Solution-Deposited Zirconia Insulators
In addition, we have fabricated tunnel junctions with three different counter-electrode deposition techniques. In doing so, various behaviors of the tunneling conductance and its dependence on magnetic field, temperature, and injected current as a function of these counter-electrode deposition …
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Hall effect in the superconducting and normal states in detwinned and twinned single crystals of zinc-doped yttrium barium copper oxide
We have investigated the influence of zinc doping on the Hall effect in detwinned and twinned single crystals of $\rm YBa\sb2Cu\sb3O\sb{7-\delta}$. We observed the sign reversal of the Hall effect for crystals with superconducting transition temperature (T$\rm\sb{c}$) as low as 58.51K. Below the …
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Convective heat transfer model for determining quench recovery of high temperature superconducting YBCO in liquid nitrogen
… liquid nitrogen may be used to cool HTS devices. Yttrium barium copper oxide (YBCO), an HTS with critical temperature of 93 K, is a promising HTS for transmission cables and electric power devices. However, before the coated YBCO conductor can be used, stability of the superconductor must well …
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Manipulating superconductivity in cuprates with selective ultrafast excitation
"Ultrafast techniques allow an unprecedented look at the electronic and bosonic interactions that govern the macroscopic properties of materials. These processes can now be accessed on their fundamental timescale---the attosecond to picosecond range. Most ultrafast measurements involve using high …