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| Author | Osquiguil, E.; Decca, R.; Nieva, G.; Civale, L.; de la Cruz, F. | ||||
Title  |
La1.80 Sr0.20 CuO4-delta a clean limit superconductor | Type | Journal Article | ||
| Year | 1988 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 65 | Issue | 6 | Pages | 491-494 |
| Keywords | CERAMIC MATERIALS; LANTHANUM COMPOUNDS – Electric Conductivity; CERAMIC SUPERCONDUCTORS; CLEAN LIMIT SUPERCONDUCTOR; HIGH-TEMPERATURE SUPERCONDUCTORS; OXYGEN CONCENTRATION; SUPERCONDUCTING MATERIALS | ||||
| Abstract | The electrical resistivity of the superconductor La1.80Sr0.20Cu04-? has been measured in a wide range of temperatures as a function of oxygen and vacuum heat treatments. The resistivity changes reversibly orders of magnitude with oxygen concentration. There is no sign of saturation at high temperatures, even for samples where the resistivity is increased by heat treatment in vacuum. Using the experimental data and general arguments it is concluded that the ceramic superconductors are high ? materials in the clean limit. | ||||
| Address | Instituto Balseiro 8400 Bariloche, R.N., Argentina# # Comisi | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 00381098 (ISSN) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Export Date: 17 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Osquiguil, E. | Approved | no | ||
| Call Number | BT @ osquigui @ | Serial | 416 | ||
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| Author | Rodriguez, E.; Luzuriaga, J.; Núñez Regueiro, M.; Fainstein, C. | ||||
| Title |
Low temperature internal friction peak in high Tc superconductors | Type | Journal Article | ||
| Year | 1991 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 77 | Issue | 10 | Pages | 777-780 |
| Keywords | Ceramic Materials; Oxides – Acoustic Properties; Yttrium Compounds – Acoustic Properties; Acoustic Variables Measurement; Attenuation Peak; Calcium Compounds; Low Temperature Internal Friction Peak; Strontium Compounds; Thermally Activated Relaxation Behavior; High Temperature Superconductors | ||||
| Abstract | We measure the internal friction Q-1 in YBa2Cu3O7-x and Bi2Sr2CaCu2O8+x samples. At temperatures near 35 K for KHz frequencies we observe an attenuation peak. In the case of YBa2Cu3O7-x, assuming a thermally activated relaxation behaviour, we are able to show that it corresponds to the same process as other peaks observed at higher frequencies. For Bi2Sr2CaCu2O8+x this is not the case, and the origin of the peak, found in all the measured samples, remains unknown. | ||||
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| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:A1991FA71400006 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 256 | ||
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| Author | Sereni, J.G.; Huber, T.E.; Luengo, C.A. | ||||
| Title |
Low temperature specific heat of Th-Gd spin glass | Type | Journal Article | ||
| Year | 1979 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 29 | Issue | 9 | Pages | 671-673 |
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| Abstract | The specific heat measurements of Th---Gd alloys, with Gd concentration ranging from 0.15% to 10.8% and temperatures between 0.4 and 8 K, are reported. The characteristic spin glass specific heat enhancement and its maximum was found linearly proportional to Gd concentration. At low temperatures a T2 dependence of the specific heat was observed and the entropy associated with the magnetic ordering was the 70% of the expected value for the spin S = 7/2. | ||||
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| ISSN | 0038-1098 | ISBN | Medium | ||
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| Notes | ISI:A1979GP96400009 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 139 | ||
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| Author | Luengo, C.A.; Huber, J.G.; Sereni, J.G.; Sweedler, A.R.; Cotignola, J.M.; Maple, M.B. | ||||
| Title |
Low temperature specific heat of ThU | Type | Journal Article | ||
| Year | 1972 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 10 | Issue | 5 | Pages | 459 |
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| Abstract | The low temperature specific heat of the weakly magnetic system Image U has been measured in both the normal and superconducting states. U impurities are found to enhanve the normal state electronic specific heat coefficient γ at an unusually large rate of 4.85 ± 0.50 mJ/mole °K2 at. % U. The specific heat jump at the superconducting transition for an alloy of composition 0.075 at. % U follows the BCS law of corresponding states suggesting that the system Image U is essentially non-magnetic at superconducting temperatures. | ||||
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| ISSN | 0038-1098 | ISBN | Medium | ||
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| Notes | ISI:A1972L797500015 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 142 | ||
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| Author | Civale, L.; Pastoriza, H.; Cruz, F. de la; Guimpel, J.; Nieva, G.; Heintz, J.M.; Durmeyer, O.; Kappler, J.P. | ||||
| Title |
Meissner fraction of insulating samples of oxide superconductors | Type | Journal Article | ||
| Year | 1989 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 72 | Issue | 4 | Pages | 341-344 |
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| Abstract | The tendency towards superconducting granularity with sample degradation is a common feature of oxide superconductors. We present magnetic, transport and calorimetric results in LiTi$2Ο4$ which show that the topological tendency to segregate the superconducting state into islands surrounded by thin insulating layers is related to the structure of the material rather than to a mechanism associated to high T$_C$. We emphasize that insulating samples with small Meissner fraction can have a superconducting volume fraction close to unity. | ||||
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| Notes | Approved | no | |||
| Call Number | BT @ hernan @ civale89 | Serial | 8 | ||
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| Author | Arce, R.; de la Cruz, F.; Fink, H.J. | ||||
| Title |
Model relating superconductive penetration depth and metallurgical phase separation in amorphous La70Cu30 | Type | Journal Article | ||
| Year | 1982 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 42 | Issue | 8 | Pages | 575-577 |
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| Abstract | A model is proposed to account for the large increase in the measured penetration depth of superconducting, amorphous La70Cu30 when the specimens are annealed sufficiently long near, but below, the crystallization temperature. It is suggested that a metallurgical phase separation occurs with domain dimensions in the submicrometer range. Penetration depth measurements as a function of temperature in a weak magnetic field are a useful tool to detect changes in phase separation in high-K materials. | ||||
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| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 567 | ||
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| Author | Decca, R.; Osquiguil, E.; de la Cruz, F.; D'Ovidio, C.; Malachevski, M.T.; Esparza, D. | ||||
| Title |
Non linear temperature dependence of the resistivity of LaSrCuO: Effects of Sr content | Type | Journal Article | ||
| Year | 1989 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 69 | Issue | 4 | Pages | 355-357 |
| Keywords | Ceramic Materials; Lanthanum Compounds--Electric Conductivity; Superconductivity; Ceramic Superconductors; Superconducting Materials | ||||
| Abstract | The linear temperature dependence of the electrical resistivity has been taken to be one of the characteristic features of the ceramic superconductors. Measurements of the electrical resistance of the LaSrCuO system in a wide temperature range show that the previous statement is only an approximation valid for some values of the Sr concentration. | ||||
| Address | Applied Research Department, Centro At'omico Bariloche | ||||
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| ISSN | 00381098 (ISSN) | ISBN | Medium | ||
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| Notes | Cited By (since 1996): 2; Export Date: 17 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Decca, R.; Basic Research Department; Centro At | Approved | no | ||
| Call Number | BT @ osquigui @ | Serial | 414 | ||
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| Author | Grigera, S.A.; Morré, E.; Osquiguil, E.; Nieva, G.; De la Cruz, F. | ||||
| Title |
Nonlocal transport properties and size effects in heavily twinned YBa2Cu3O7-delta single crystals | Type | Journal Article | ||
| Year | 1998 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 107 | Issue | 7 | Pages | 335-339 |
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| Abstract | We demonstrate experimentally that when the vortex correlation length in the liquid state becomes of the order of the sample thickness, size effects dominate the transport properties of the macroscopic vortex structures, implying a nonlocal response in the transformer experiments. | ||||
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| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000074907100004 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 237 | ||
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| Author | Bressan, O.J.; Ridner, A.E.; Luengo, C.A.; Alascio, B. | ||||
| Title |
On the evidence for electron-electron scattering in the electrical resistivity of In | Type | Journal Article | ||
| Year | 1970 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 8 | Issue | 24 | Pages | 2129-2133 |
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| Abstract | Experimental measurements of the electrical magnetoresistivity of high purity Indium at low temperatures have been performed and clearly indicate that: 1. (a) A generalized Kohler's rule can be used to describe all experiments. 2. (b) A reliable method is therefore obtained for extrapolating the zero magnetic field resistivity to temperatures below the superconducting transition temperature. 3. (c) Clear-cut and reliable data show that no T2 dependence of the resistance is found; therefore no evidence of electron-electron interaction appears, contrary to information previously reported in the literature. |
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| ISSN | 0038-1098 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 548 | ||
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| Author | Seyfarth, G.; Jaccard, D.; Pedrazzini, P.; Krzton-Maziopa, A.; Pomjakushina, E.; Conder, K.; Shermadini, Z. | ||||
| Title |
Pressure cycle of superconducting Cs0.8Fe2Se2 : A transport study | Type | Journal Article | ||
| Year | 2011 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 151 | Issue | 10 | Pages | 747-750 |
| Keywords | Fe; Se; chalcogenides; Superconductivity; High pressure; electrical resistivity | ||||
| Abstract | We report measurements of the temperature and pressure dependence of the electrical resistivity (Ï) of single-crystalline iron-based chalcogenide Cs0.8Fe2Se2. In this material, superconductivity with a transition temperature Tc~30K source develops from a normal state with extremely large resistivity. At ambient pressure, a large “hump†in the resistivity is observed around 200 K. Under pressure, the resistivity decreases by two orders of magnitude, concomitant with a sudden Tc suppression around pc~30K. Even at 9 GPa a metallic resistivity state is not recovered, and the Ï(T) “hump†is still detected. A comparison of the data measured upon increasing and decreasing the external pressure leads us to suggest that the superconductivity is not related to this hump. | ||||
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| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 604 | ||
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