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Author Encina, S.; Pedrazzini, P. doi  openurl
  Title Low Temperature Thermoelectric Power of Ce(Pd{1-x}Cux)2Si2 Type Journal Article
  Year 2015 Publication Journal of Low Temperature Physics Abbreviated Journal J. Low Temp. Phys.  
  Volume 179 Issue 1-2 Pages 21-27  
  Keywords Heavy fermions; Antiferromagnetic transition; Thermopower; Electrical resistivity  
  Abstract We present the thermoelectric power S(T) of the Ce(Pd 1−x Cu x ) 2 Si 2 alloy for temperatures \(1.5\,\mathrm{K} K. We observe three characteristic features across the \(0 substitution range: two positive maxima and a negative minimum, that are typical for Ce compounds that display, or lie close to, magnetism. Our analysis of the data shows that the high- T maximum is related to the Kondo effect on excited crystal-field levels, but that the low- T one cannot be simply associated with the Kondo scale, TK . We speculate that disorder induced by alloying can be at the origin of this discrepancy and can also be responsible for the low S(T) measured at low temperatures in the \(0.2 concentration range. We have extended electrical resistivity measurements on Ce(PdCu)Si 2 ( x=0.5 ) down to T∼40 mK in applied fields as high as 16 T.  
  Address  
  Corporate Author Thesis  
  Publisher Springer US Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0022-2291 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 706  
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Author Frank, V.L.P. openurl 
  Title Measurements of superconducting critical currents with an Apple II plus microcomputer Type Journal Article
  Year 1985 Publication Instruments & Computers Abbreviated Journal Int. Inst. & Comp.  
  Volume 3 Issue Pages 4-7  
  Keywords Data aquisistion and processing; IEEE-488 interfacing; superconducting properties; electrical resistivity measurements  
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  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 810  
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Author Guimpel, J.; de la Cruz, F. url  doi
openurl 
  Title Electrical resistivity of amorphous Zr70Cu30 and the Kondo like model Type Journal Article
  Year 1982 Publication Solid State Communications Abbreviated Journal Solid State Commun.  
  Volume 44 Issue 7 Pages 1045-1046  
  Keywords Zr70Cu30; superconductivity; electrical resistivity; ZIRCONIUM COPPER ALLOYS  
  Abstract Electrical resistivity measurements of amorphous Zr70Cu30 as a function of the concentrations of two level systems show that a Kondo like theory cannot explain the observed temperature dependence.  
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  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 0038-1098 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 540  
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Author Haberkorn, N.; Bridoux, G.; Osquiguil, E.; Nieva, G.; Guimpel, J. url  openurl
  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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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 01694332 (ISSN) ISBN Medium  
  Area Expedition Conference  
  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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Author Pedrazzini, P.; Jaccard, D. doi  openurl
  Title The critical pressure of chromium Type Journal Article
  Year 2008 Publication Physica B: Condensed Matter Abbreviated Journal Physica B  
  Volume 403 Issue 5-9 Pages 1222-1224  
  Keywords Chromium; Quantum phase transitions; High pressure; Resistivity  
  Abstract We present first results of high-pressure resistivity measurements on pure chromium. Two pieces of evidence show that spin density wave magnetism is suppressed at a critical pressure pc?10GPa, namely, the evolution of the ordering temperature TN(p) and the rapid decrease of the residual resistivity close to pc. Our discussion profits from the comparison between pressurized-Cr and the Cr1-xVx alloy, for which a large amount of information on its electronic properties is available.  
  Address  
  Corporate Author DPMC, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland Thesis  
  Publisher Elsevier Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0921-4526 ISBN Medium  
  Area Expedition Conference International Conference on Strongly Correlated Electron Systems  
  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 429  
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Author Pedrazzini, P.; Jaccard, D.; Deppe, M.; Geibel, C.; Sereni, J.G. url  doi
openurl 
  Title Multiprobe high-pressure experiments in CePd0.6Rh0.4 and CePd3 Type Journal Article
  Year 2009 Publication Physica B: Condensed Matter Abbreviated Journal Physica B  
  Volume 404 Issue 19 Pages 2898-2903  
  Keywords Ce compounds; Ferromagnetism; Quantum phase transition; High pressure; Resistivity; Seebeck coefficient; Specific heat  
  Abstract Results of recent multiprobe high-pressure experiments on ferromagnetic CePd0.6Rh0.4 and intermediate-valent CePd3 are presented. Simultaneous resistivity (ρ), thermopower (S), and ac heat capacity measurements show that the long-range ferromagnetic state of CePd0.6Rh0.4 vanishes in the proximity of a sharp valence-crossover pressure , i.e. before reaching a quantum critical point. However, a magnetic signal that is progressively suppressed is still detected at higher pressures. For CePd3, the results of simultaneous ρ(T,p) and S(T,p) measurements up to and down to the mK temperature range show a surprisingly weak pressure dependence.  
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  ISSN 0921-4526 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number BT @ jsereni @ Serial 561  
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Author Pedrazzini, P.; Jaccard, D.; Lapertot, G.; Flouquet, J.; Inada, Y.; Kohara, H.; Onuki, Y. doi  openurl
  Title Probing the extended non-Fermi liquid regimes of MnSi and Fe Type Journal Article
  Year 2006 Publication Physica B – Condensed Matter Abbreviated Journal Physica B  
  Volume 378-380 Issue Pages 165-166  
  Keywords electrical resistivity; Fermi liquid; ferromagnetic materials; high-pressure effects; iron; magnetic superconductors; manganese alloys; silicon alloys; strongly correlated electron systems; superconducting transition temperature; superconducting transitions; whiskers; MnSi; Fe  
  Abstract Recent studies show that the non-Fermi liquid (NFL) behavior of MnSi and Fe spans over an unexpectedly broad pressure range, between the critical pressure p and around 2p. In order to determine the extension of their NFL regions, we analyze the evolution of the resistivity ρ(T)˜A(p)T at higher pressures. We find that in MnSi the n=32 exponent holds below 4.8GPa≈3p, but it increases above that pressure. At 7.2 GPa we observe the low-temperature Fermi liquid exponent n=2 whereas for T>1.5K, n=53. Our measurements in Fe show that the NFL behavior ρ˜T extends at least up to 30.5 GPa, above the entire superconducting (SC) region. In the studied pressure range, the onset of the SC transition reduces by a factor 10 down to Tconset(30.5GPa)=0.23K, while the A—coefficient diminishes monotonically by around 50%.  
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  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 469  
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Author Seyfarth, G.; Jaccard, D.; Pedrazzini, P.; Krzton-Maziopa, A.; Pomjakushina, E.; Conder, K.; Shermadini, Z. doi  openurl
  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 (ρ) 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 ρ(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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  Area Expedition Conference  
  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 604  
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