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Author Maiorov, B.; Osquiguil, E.
Title (down) Vortex solid state in YBa2Cu3O7-? twinned crystals Type Journal Article
Year 2001 Publication Physical Review B – Condensed Matter and Materials Physics Abbreviated Journal Phys. Rev. B Condens. Matter Mater. Phys.
Volume 64 Issue 5 Pages 0525111-0525114
Keywords barium; copper derivative; yttrium; article; conductor; crystal; high temperature procedures; magnetic field; mathematical analysis; melting point; solid state; temperature; thermodynamics
Abstract We report on the scaling of transport properties around the vortex melting in YBa2Cu3O7-? oriented-twin single crystals in applied magnetic fields between 1 T and 18 T. We find that for the whole measured field range the linear resistivity scales as ?(t,?)?tsyF
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ISSN 01631829 (ISSN) ISBN Medium
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Notes Cited By (since 1996): 6; Export Date: 17 April 2009; Source: Scopus; Art. No.: 052511; CODEN: PRBMD; Language of Original Document: English; Correspondence Address: Maiorov, B.; Centro At Approved no
Call Number BT @ osquigui @ Serial 371
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Author Maiorov, Boris A.
Title (down) Transición de fase y dinámica de vórtices en YBa2Cu3O7-δ Type Book Whole
Year 2003 Publication Abbreviated Journal
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Address Instituto Balseiro
Corporate Author Thesis Ph.D. thesis
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Call Number BT @ hernan @ Serial 333
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Author Decca, R.S.; Drew, H.D.; Maiorov, B.; Guimpel, J.; Osquiguil, E.
Title (down) Superconducting Materials Engineered Using a Near-Field Scanning Optical Microscope Type Journal Article
Year 1998 Publication Scanning Abbreviated Journal Scanning
Volume 20 Issue 3 Pages
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Address Instituto Balseiro, Centro At
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ISSN 01610457 (ISSN) ISBN Medium
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Notes Export Date: 17 April 2009; Source: Scopus; CODEN: SCNND; Language of Original Document: English; Correspondence Address: Decca, R.S.; Laboratory for Physical Sciences; Department of Physics; University of Maryland College Park, MD, United States; References: Kudinov, V.I., Chaplygin, I.L., Kirilyuk, A.I., Kreines, N.M., Laitho, R., L Approved no
Call Number BT @ osquigui @ Serial 378
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Author Decca, R.S.; Drew, H.D.; Maiorov, B.; Guimpel, J.; Osquiguil, E.
Title (down) Superconducting Materials Engineered Using a Near-Field Scanning Optical Microscope Type Conference Article
Year 1998 Publication Scanning Abbreviated Journal Scanning
Volume 20 Issue Pages 156
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Call Number BT @ jguimpel @ Serial 625
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Author Correa, V. F; Villagrán Asiares, A. G.; Betancourth, D.; Encina, S.; Pedrazzini, P.; Cornaglia, P.S.; García D.J.; Sereni, J. G.; Maiorov, B; Caroca-Canales, N; Geibel, Ch.
Title (down) Strong magnetoelastic effect in CeCo1−xFexSi as Néel order is suppressed Type Journal Article
Year 2019 Publication Physical Review B Abbreviated Journal Phys. Rev. B
Volume 100 Issue Pages 184409
Keywords
Abstract A very strong magnetoelastic effect in the CeCo1−xFexSi alloys is reported. The strength of the magnetostrictive

effect can be tuned upon changing x. The moderate low-temperature linear magnetostriction observed at low

Fe concentrations becomes very large (L

L (16T, 2K) = 3 × 10−3) around the critical concentration xc ≈ 0.23 at

which the long-range antiferromagnetic order vanishes. Upon increasing doping through the nonmagnetic region

(x > xc), the magnetostriction strength gradually weakens again. The interplay between magnetic order and the

Kondo screening appears to cause an enhanced valence susceptibility slightly changing the Ce ions valence,

ultimately triggering the large magnetostriction observed around the critical concentration. Previous studies

of the evolution of the lattice parameters with x as well as magnetization and x-ray absorption spectroscopy

measurements support this hypothesis.
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Call Number BT @ victor.correa @ Serial 842
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Author Bahrs, S.; Goni, A.R.; Thomsen, C.; Maiorov, B.; Nieva, G.; Fainstein, A.
Title (down) Rare-earth dependence of photoinduced chain-oxygen ordering in RBa2Cu3O7-x (x approximate to 0.3) investigated by Raman scattering Type Journal Article
Year 2002 Publication PHYSICAL REVIEW B Abbreviated Journal
Volume 65 Issue 2 Pages 024522
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Abstract We investigated a set of oxygen – deficient RBa2Cu3O7-x (xapproximate to0.3) ceramic samples with Raman spectroscopy under resonant conditions for the defect-induced Cu-O chain related modes at 230 and 600 cm(-1). Emphasis was laid on the frequency and intensity of the modes for different rare-earth atoms, and especially on their dependence under illumination. The modes display photoinduced bleaching for all R, including the nonsuperconducting R = Pr. The dynamics of their bleaching following a temperature quench indicates similar complex relaxation processes for all samples. A simple stretched exponential with a common beta = 0.36+/-0.04 and a distribution of time constants ranging from 50 to 1400 s describes our data well. We discuss our results in connection to photoinduced chain-oxygen ordering in oxygen-deficient superconductors.
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ISSN 1098-0121 ISBN Medium
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Notes ISI:000173213100111 Approved no
Call Number BT @ hernan @ Serial 213
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Author Bahrs, S.; Goni, A.R.; Maiorov, B.; Nieva, G.; Fainstein, A.; Thomsen, C.
Title (down) Raman-study of photoinduced chain-oxygen ordering in RBa2Cu3O7-delta Type Journal Article
Year 2003 Publication IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY Abbreviated Journal
Volume 13 Issue 2 Pages 3192-3195
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Abstract We investigated Raman-forbidden signals in RBa2Cu3O7-delta with R = Y or Pr, which lose intensity under illumination at low temperatures. These defect-induced,peaks are only visible in oxygen-deficient material and for light polarized parallel to the copper-oxygen chains along the material's b-axis. In a first, two-laser based experiment we established that the bleaching effect of the light is polarization dependent as well. From this and other known properties we conclude that the signal is connected to the copper-oxygen chains, reflecting their state of disorder, and is thus closely related to aging and to the persistent photoconductivity effect in the material. In a second set of experiments we followed the temperature dependence of the Raman spectra and the intensity decrease.
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ISSN 1051-8223 ISBN Medium
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Notes ISI:000184242400193 Approved no
Call Number BT @ hernan @ Serial 209
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Author Decca, R.S.; Drew, H.D.; Maiorov, B.; Guimpel, J.; Osquiguil, E.
Title (down) Photoinduced superconducting nanowires in GdBa2Cu3O6.5 films Type Journal Article
Year 1998 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume 73 Issue 1 Pages 120-122
Keywords
Abstract We report the fabrication of high-Tc superconducting wires by photodoping a GdBa2Cu3O6.5 thin film. An optical near-field probe was used to locally excite carriers in the system at room temperature. Trapping of the photogenerated electrons define a confining potential for the conducting holes in the CuO planes. Spatially resolved reflectance measurements show the photogenerated nanowires to be ?250 nm wide. Electron diffusion, before electron capture, is believed to be responsible for the observed width of the wires.
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ISSN 00036951 (ISSN) ISBN Medium
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Notes Cited By (since 1996): 7; Export Date: 17 April 2009; Source: Scopus; CODEN: APPLA; doi: 10.1063/1.121787; Language of Original Document: English; Correspondence Address: Decca, R.S.; Laboratory for Physical Sciences; Department of Physics; University of Maryland College Park, MD 20742, United States; References: Freyhardt, H.C., (1993) Applied Superconductivity, , See edited by DGM Informationsgesellschaft, Oberursel and references therein; Kirilyuk, A.I., Kreines, N.M., Kudinov, V.I., (1990) Pis'ma Zh. Eksp. Teor. Fiz., 52, p. 696; Kirilyuk, A.I., Kreines, N.M., Kudinov, V.I., (1990) [JETP Lett., 52, p. 49; Osquiguil, E., Maenhoudt, M., Wuyts, B., Bruynseraede, Y., Lederman, D., Schuller, I.K., (1994) Phys. Rev. B, 49, p. 3675; Kudinov, V.I., Chaplygin, I.L., Kirilyuk, A.I., Kreines, N.M., Laiho, R., L Approved no
Call Number BT @ osquigui @ Serial 377
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Author Bahrs, S.; Guimpel, J.; Goni, A.R.; Maiorov, B.; Fainstein, A.; Nieva, G.; Thomsen, C.
Title (down) Persistent photo-excitation in GdBa2Cu3O6.5 in a simultaneous Raman and electrical-transport experiment Type Journal Article
Year 2005 Publication Physical Review B Abbreviated Journal Phys. Rev. B
Volume 72 Issue 14 Pages 144501
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Abstract We investigate the connection between persistent illumination-induced effects in underdoped RBa2Cu3O7-delta known as persistent photoconductivity and Raman bleaching. Despite the long-standing assumption that the electrical and optical properties respond to the same light-induced change in the material, they have not been directly compared until now. We present a simultaneous experiment of Raman spectroscopy and electrical transport under visible illumination at low temperatures. The time dependence of the response in the two methods differs by two orders of magnitude, showing that the effects are connected but not identical. We discuss our results within the oxygen-vacancy reordering model of photobleaching and find that different Cu-O chain lengths affect the optical and the electrical response differently. Raman bleaching and persistent photoconductivity thus provide a different perspective on the microscopic oxygen vacancy distribution.
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ISSN 1098-0121 ISBN Medium
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Notes ISI:000232934100060 Approved no
Call Number BT @ hernan @ Serial 204
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Author Levy, G.; Maiorov, B.; Corvalan, M.S.; Fainstein, A.; Nieva, G.
Title (down) Oxygen overdoping in superconducting and non-superconducting Y1-xPrxBa2Cu3Oy Type Journal Article
Year 2002 Publication PHYSICA B-CONDENSED MATTER Abbreviated Journal
Volume 320 Issue 1-4 Pages 333-336
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Abstract We present the evolution of magnetic and structural properties of Y1-xPrxBa2Cu3Oy (xsimilar to0.5 and x = 1) single crystals and polycrystalline materials when the oxygen concentration y is varied from under- to overdoping. We have found a monotonous evolution of the Pr Neel temperature for x = 1 samples and a maximum of the superconducting critical temperature for the xsimilar to0.5 samples. The structural properties as detected by X-ray diffraction and Raman spectroscopy show no instabilities when crossing the optimal doping region as was found in the x = 0 material. (C) 2002 Elsevier Science B.V. All rights reserved.
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ISSN 0921-4526 ISBN Medium
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Notes ISI:000177607700091 Approved no
Call Number BT @ hernan @ Serial 211
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