Lisa Paulius

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08/16/2002 Superconducting Phase Diagram of Single Crystal MgB2 U. Welp , A. Rydh , G. Karapetrov , W. K. Kwok , G. W. Crabtree , Ch. Marcenat , L. Paulius , T. Klein , J. Marcus , K. H. P. Kim , C. U. Jung , H.-S. Lee , B. Kang , S.-I. Lee d a Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 b Départment de Recherche Fondamentale(More)
We report on magnetoresistance measurements of the effects of 9 MeV proton irradiation on a clean, untwinned single crystal of YBa2Cu3O7-delta. For the first time, evidence for a vortex glass transition is detected in an untwinned single crystal of YBa2Cu3O7-delta with induced pointlike disorder, in which the first order vortex melting transition is(More)
Superconducting QUantum Interference Device (SQUID) microscopy has excellent magnetic field sensitivity, but suffers from modest spatial resolution when compared with other scanning probes. This spatial resolution is determined by both the size of the field sensitive area and the spacing between this area and the sample surface. In this paper we describe(More)
We have measured the specific heat, resistivity, and ac susceptibility of (K,Ba)BiO3 single crystals before and after introduction of either point or columnar defects by electron (EI) or heavy-ion irradiation (HII). While the magnetic field dependence of these properties remains mainly unaffected by EI, the irreversibility line and the location of the(More)
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