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Author (down) Wuyts, B.; Osquiguil, E.; Maenhoudt, M.; Libbrecht, S.; Gao, Z.X.; Bruynseraede, Y.
Title Relation between the Hall angle slope and the carrier density in oxygen-depleted YBa2Cu3Ox films Type Journal Article
Year 1994 Publication Physica C: Superconductivity and its applications Abbreviated Journal Phys C Supercond Appl
Volume 222 Issue 3-4 Pages 341-348
Keywords Doping (additives); Electric conductivity; Hall effect; Mathematical models; Thermal effects; Thin films; Transport properties; Yttrium compounds; Carrier density; Hall angle slope; Oxygen content; Zero temperature intercept; Superconducting films
Abstract A detailed study of the Hall angle cot?H in YBa2Cu3Ox epitaxial thin films with various oxygen contents clearly shows the existence of a linear relation between the slope of cot?H versus T2 and the carrier density. The zero-temperature intercept C=cot?H(T=0 K) and the mobility at room temperature change substantially for an oxygen content x?6.6, indicating that both effects are closely related.
Address Laboratorium voor Vaste Stof-Fysika en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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ISSN 09214534 (ISSN) ISBN Medium
Area Expedition Conference
Notes Cited By (since 1996): 8; Export Date: 17 April 2009; Source: Scopus; CODEN: PHYCE; Language of Original Document: English; Correspondence Address: Bruynseraede, Y.; Laboratorium voor Vaste Stof-Fysika en Magnetisme; Katholieke Universiteit Leuven; Celestijnenlaan 200 D B-3001 Leuven, Belgium Approved no
Call Number BT @ osquigui @ Serial 395
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Author (down) Rigal, L.B.; Schmadel, D.C.; Drew, H.D.; Maiorov, B.; Osquiguil, E.; Preston, J.S.; Hughes, R.; Gu, G.D.
Title Magneto-optical evidence for a gapped Fermi surface in underdoped YBa 2Cu3O6+x Type Journal Article
Year 2004 Publication Physical Review Letters Abbreviated Journal Phys Rev Lett
Volume 93 Issue 13 Pages
Keywords Antiferromagnetism; Carrier concentration; Cyclotrons; Doping (additives); Faraday effect; Hall effect; High temperature superconductors; Magnetic susceptibility; Magnetooptical effects; Photoemission; Yttrium barium copper oxides; Fermi arcs; Hall frequency; Magnetic excitations; Photoemission spectroscopy; Fermi surface
Abstract An evidence presented that supports partial gapping of the Fermi surface by a measurement of the Hall frequency from high frequency magneto-optical measurements on underdoped YBa2Cu3O6+x (YBCO) was discussed. It was found that the Hall frequency was obtained independently of the unknown k-space dependence of the carrier scattering rates that complicated the dc Hall effect. It was observed that the frequency dependence of the Hall angle was Drude-like and indicated a quasielastic relaxation process for optimal and underdoped samples. The results show that there was an increase of the Hall frequency in the pseudogap state.
Address Department of Physics, Brookhaven National Laboratory, Upton, NY 11973, United States
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ISSN 00319007 (ISSN) ISBN Medium
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Notes Cited By (since 1996): 13; Export Date: 17 April 2009; Source: Scopus; CODEN: PRLTA; doi: 10.1103/PhysRevLett.93.137002; Language of Original Document: English; Correspondence Address: Rigal, L.B.; Department of Physics; University of Maryland College Park, MD 20742, United States; References: Timusk, T., Statt, B., (1999) Rep. Prog. Phys., 62, p. 61; Tallon, J.L., Loram, J.W., (2001) Physica (Amsterdam), 349 C, p. 53; Damascelli, A., Hussain, Z., Shen, Z.-X., (2003) Rev. Mod. Phys., 75, p. 473; Chakravarty, S., Nayak, C., Tewari, S., (2003) Phys. Rev. B, 68, pp. 100504R; Chakravarty, S., (2002) Phys. Rev. Lett., 89, p. 277003; Tranquada, J., (1995) Nature (London), 375, p. 561; Tranquada, J., (1997) Phys. Rev. Lett., 78, p. 338; Orenstein, J., Millis, A.J., (2000) Science, 288, p. 468; Brinkman, W.F., Rice, T.M., (1971) Phys. Rev. B, 4, p. 1566; Lange, E., Eotliar, G., (1999) Phys. Rev. Lett., 82, p. 1317; Cerne, J., (2003) Rev. Sci Instrum., 74, p. 4755; Rotter, L.D., (1991) Phys. Rev. Lett., 67, p. 2741; Schutzmann, J., (1992) Phys. Rev. B, 46, p. 512; Cooper, S.L., (1992) Phys. Rev. B, 45, p. 2549; Cerne, J., (2000) Phys. Rev. B, 61, p. 8133; Cerne, J., (2000) Phys. Rev. Lett., 84, p. 3418; Konstantinovic, Z., Li, Z.Z., Raffy, H., (2000) Phys. Rev. B, 62, pp. R11 989; Hwang, H.Y., (1994) Phys. Rev. Lett., 72, p. 2636; Chien, T.R., Wang, Z.Z., Ong, N.P., (1991) Phys. Rev. Lett., 67, p. 2088; Harris, J.M., Tan, Y.F., Ong, N.P., (1991) Phys. Rev. B, 46, p. 14293; Zheleznyak, A.T., (1998) Phys. Rev. B, 57, p. 3089; Shen, Z.X., Dassau, D., (1995) Phys. Rep., 253, p. 1; Schabel, M.C., (1998) Phys. Rev. B, 57, p. 6090; (1998) Phys. Rev. B, 57, p. 6107; Johnson, P.D., (2001) Phys. Rev. Lett., 87, p. 177007; S. Tewari et al., cond-mat/0310165Cooper, S.L., (1993) Phys. Rev. B, 47, p. 8233; Orenstein, J., (1990) Phys. Rev. B, 42, p. 6342; Puchkov, A.V., Basov, D.N., Timusk, T., (1996) J. Phys. Condens. Matter, 8, p. 10049 Approved no
Call Number BT @ osquigui @ Serial 366
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Author (down) Libbrecht, S.; Osquiguil, E.; Wuyts, B.; Maenhoudt, M.; Gao, Z.X.; Bruynseraede, Y.
Title Effect of room temperature annealing on the properties of oxygen- deficient YBa2Cu3Ox films Type Journal Article
Year 1993 Publication Physica C: Superconductivity and its applications Abbreviated Journal Phys C Supercond Appl
Volume 206 Issue 1-2 Pages 51-58
Keywords Annealing; Ceramic materials; Hall effect; Superconducting films; Yttrium compounds; Critical current density; Oxide superconductors; Yttrium barium copper oxides; High temperature superconductors
Abstract Annealing at room temperature of quenched oxygen-depleted YBa2Cu3Oxn (6.5?xn<6.8) films, produces a clear increase in the critical temperature Tc and current density Jc, while the normal state resistivity ?{variant}xx and Hall coefficient RH decrease as a function of annealing time, indicating an increase in carrier density. The enhancement of the critical current density Jc is more pronounced at high fields and temperatures due to a shift of the irreversibility line, which scales with the increasing Tc. The observed changes are accompanied by corresponding changes in the crystalline structure, which can be related to oxygen ordering effects.
Address Laboratorium voor Vaste Stof-Fysika en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 09214534 (ISSN) ISBN Medium
Area Expedition Conference
Notes Cited By (since 1996): 11; Export Date: 17 April 2009; Source: Scopus; CODEN: PHYCE; Language of Original Document: English; Correspondence Address: Libbrecht, S.; Laboratorium voor Vaste Stof-Fysika en Magnetisme; Katholieke Universiteit Leuven; Celestijnenlaan 200D B-3001 Leuven, Belgium Approved no
Call Number BT @ osquigui @ Serial 402
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Author (down) Lederman, D.; Osquiguil, E.; Nieva, G.; Guimpel, J.; Hasen, J.; Bruynseraede, Y.; Schuller, I.K.
Title Photoinduced enhancement of superconductivity Type Journal Article
Year 1994 Publication Journal of Superconductivity Abbreviated Journal J Supercond
Volume 7 Issue 1 Pages 127-130
Keywords photoconduction; Superconductivity; thin films; Copper oxides; Hall effect; Order disorder transitions; Radiation effects; Superconductivity; X ray analysis; Josephson coupling; Oxide superconductors; Yttrium barium cuprates; High temperature superconductors
Abstract The photoinduced enhancement of superconductivity in RBa2Cu3Ox (R=rare earth or yttrium) and PryR1-yBa2Cu3Ox was explored through temperature-dependent resistivity, Hall coefficient and mobility, and x-ray diffraction measurements. The increases in Tc are enhanced near the metal-insulator transition, although photoinduced changes always exist in oxygendeficient samples. Several explanations, including intergrain Josephson coupling, photoassisted oxygen ordering, and the trapping of photogenerated electrons in oxygen vacancies, are discussed.
Address Centro At
Corporate Author Thesis
Publisher Kluwer Academic Publishers-Plenum Publishers Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 08961107 (ISSN) ISBN Medium
Area Expedition Conference
Notes Cited By (since 1996): 2; Export Date: 17 April 2009; Source: Scopus; CODEN: JOUSE; doi: 10.1007/BF00730382; Language of Original Document: English; Correspondence Address: Lederman, D.; Physics Department; University of California; San Diego La Jolla, 92093-0319, California, United States Approved no
Call Number BT @ osquigui @ Serial 397
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Author (down) Haberkorn, N.; Bridoux, G.; Osquiguil, E.; Nieva, G.; Guimpel, J.
Title Hall effect in a GdBa2Cu3O7-?/La0.75 Sr0.25MnO3 perovskite bilayer Type Journal Article
Year 2007 Publication Applied Surface Science Abbreviated Journal Appl. Surf. Sci.
Volume 254 Issue 1 SPEC. ISS. Pages 222-224
Keywords Hall effect; Perovskite Bilayer; Barium compounds; Ferromagnetic materials; Films; Hall effect; Magnetic fields; Magnetron sputtering; Manganites; Perovskite; Strontium compounds; Superconducting devices; Dc magnetron sputtering; Electric transport; Hall resistivity regimes; Oxygen doping; Gadolinium compounds
Abstract We present results on the Hall coefficient RH in the normal state for a GdBa2Cu3O7-?/La0.75 Sr0.25MnO3 bilayer and a La0.75Sr0.25MnO3 film grown by dc magnetron sputtering on (1 0 0) SrTiO3. We find that the electric transport on the bilayer can be qualitatively described using a simple parallel layers model. The GdBa2Cu3O7-? layer presents a carrier density approximately equal to that reported for 7 – ? = 6.85 oxygen doping. Also we observe an unexpected presence of two Hall resistivity regimes, effects that may be associated with the internal magnetic field induced on the superconducting layer by the ferromagnetic layer.
Address Instituto Balseiro, Universidad Nacional de Cuyo, Comisi
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ISSN 01694332 (ISSN) ISBN Medium
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Notes Export Date: 17 April 2009; Source: Scopus; CODEN: ASUSE; doi: 10.1016/j.apsusc.2007.07.041; Language of Original Document: English; Correspondence Address: Haberkorn, N.; Comisi Approved no
Call Number BT @ osquigui @ Serial 363
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