Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 74.70.−b  (2)
  • Low-temperature tetragonal (TLT) phase  (2)
  • quasi-two-dimensional superconductor  (2)
  • Blutspuren, Nachweis von fetalem Hämoglobin  (1)
Source
Material
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Structural instabilities and superconductivity in La-214 compounds (1994)
    Springer
    Journal of superconductivity 7 (1994), S. 39-43 
    Details
    ISSN: 1572-9605
    Keywords: Low-temperature tetragonal (TLT) phase ; 1/8 problem ; La2−y−x Th y Ba x CuO4 ; La2−y−x Nd y Ba x CuO4 ; La2−x (Ba, Sr, Ca) x ,CuO4
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract In La2−x Ba x CuO4 (LBCO) the transition to a low-temperature tetragonal phase and the suppression of superconductivity occur at the carrier concentration p≈ 1/8 per copper. We will discuss the roles of various material parameters that control this instability. An unusual lattice softening has been found by ultrasonic measurement on La2−x Sr x CuO4 (LSCO). This softening is present only in an in-plane shearing mode and is ascribed to the growth of structural fluctuations in the normal state. These phenomena are closely related because both the structural change in LBCO and the applied strain in LSCO lift the degeneracy of in-plane oxygen sites. They clarify the importance of strong coupling between the normal-state electronic system and the lattice by a Peierls-type mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00730365
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Normal-state and superconducting properties of Sr2RuO4 (1996)
    Springer
    Journal of low temperature physics 105 (1996), S. 1577-1586 
    Details
    ISSN: 1573-7357
    Keywords: 74.25.−q ; 74.70.−b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We discuss some of the current issues on the copper-free layered perovskite superconductor Sr2RuO4, for which a sharp transition at Tc = 1.2 K has been reproducibly obtained. The normal state is characterized as an essentially twodimensional Fermi liquid, and the coherent interlayer transport is established only at low temperatures. The cylindrical Fermi surface observed by de Haas-van Alphen experiments is consistent with other thermodynamic and transport properties. Although the specific heat jump across Tcconfirms the bulk superconductivity, the large residual T-linear term which correlates with the variation in Tcis unusual and suggestive of unconventional pairing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00753925
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Crossover from 3D to 2D metallic conduction in Sr2RuO4 (1996)
    Springer
    Journal of low temperature physics 105 (1996), S. 1593-1598 
    Details
    ISSN: 1573-7357
    Keywords: 72.15.Lh ; 74.25.Fy ; 74.70.−b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have investigated the normal-state conduction of superconducting Sr2RuO4 (Tc ∼ 1K), which is isostructural to La2−xSrxCuO4. The resistivity of single crystals shows a crossover at TM∼130K from 3D metallic conduction at lower temperatures to 2D one at higher temperatures. Concerning the temperature dependence of the out-of-plane resistivity, we present a systematic interpretation based on competition between the life time of the quasiparticles and the time for the quasiparticles to travel between the adjacent RuO2 planes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00753927
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Identification of fetal hemoglobin in blood stains by high performance liquid chromatography (1989)
    Springer
    International journal of legal medicine 102 (1989), S. 437-444 
    Details
    ISSN: 1437-1596
    Keywords: Fetal hemoglobin, identification in blood stains ; Blood stains, identification of fetal hemoglobin ; Fetales Hämoglobin, in Blutspuren ; Blutspuren, Nachweis von fetalem Hämoglobin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Es wurde eine neue Methode zur Identifizierung von fetalem Hämoglobin (Hb F) in Blutspuren mit der umgekehrten Phase-Hochleistungsflüssigkeitschromatographie durchgeführt. Die Unterscheidung zwischen fetalen Blutspuren und denen von Erwachsenen erfolgte aufgrund der Existenz der Spitzen der γ-Ketten von Hb F. In den Chromatogrammen der untersuchten Blutspuren von Erwachsenen traten fast keine γ-Ketten auf. Diese Methode ermöglichte ferner die Bestimmung des Hb F-Wertes mit dem Flächenverhältnis der Globin-Ketten auf den Chromatogrammen. Hb F-Werte der sechs Fälle von Nabelschnurblutspuren auf dem Filterpapier lagen zwischen 81.1% und 91.3%. Die vorliegende Untersuchung zeigt, daß sich der Hb F-Wert für mindestens 12 Wochen nicht ändert. In der Praxis der Rechtsmedizin ist diese Methode im Hinblick auf die Einfachheit, hohe Empfindlichkeit, Schnelligkeit und Zuverlässigkeit sehr wertvoll.
    Notes: Summary A new method for the identification of fetal hemoglobin (Hb F) in blood stains by reverse-phase high performance liquid chromatography is described. Differentiation between fetal and adult blood stains is based on the existence of γ-chain peaks which are characteristic of Hb F. Very few γ chains appeared on chromatograms of all the adult blood stains examined. The level of Hb F could be determined by measuring the total of chromatogram γ-globin chain areas, and expressing it as a percentage of total Hb. Levels in six cord blood stains on filter paper ranged from 81.1% to 91.3% and remained constant for at least 12 weeks. This method is of great value for its simplicity, sensitivity and speed, and most importantly for its reliability in the field of forensic medicine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204074
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Experimental Evidence for Spin-Triplet Superconductivity in Sr2RuO4 (1999)
    Springer
    Journal of superconductivity 12 (1999), S. 535-541 
    Details
    ISSN: 1572-9605
    Keywords: Sr2RuO4 ; spin-triplet superconductivity ; specific heat ; upper critical field ; quasi-two-dimensional superconductor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We review the experimental evidence for spin-triplet superconductivity in Sr2RuO4. The Knight shift experiments decisively demonstrated that the Cooper-pair symmetry is spin triplet. We discuss the most probable wave function of the Cooper pairs on the basis of the results of a number of key experiments. We point out that a simple picture of the unitary state with the isotropic gap is not compatible with the observed behavior of the specific heat, and that a profound modification of the pairing wave function is needed. We also present the in-plane angular dependence of the upper critical field, with the field applied exactly parallel to the quasi-two-dimensional plane. We discuss the possible implication of the observed fourfold anisotropy in connection with the proposed second superconducting state with a line-node gap.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007740403257
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Superconducting Properties of the 3-K Phase of Sr2RuO4 near Hc2 (1999)
    Springer
    Journal of superconductivity 12 (1999), S. 567-570 
    Details
    ISSN: 1572-9605
    Keywords: Sr2RuO4 ; Sr2RuO4–Ru eutectic ; upper critical field ; quasi-two-dimensional superconductor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The superconducting transition temperature, T c , of the impurity-free, intrinsic Sr2RuO4 is as high as 1.50 K. However, we recently showed that T c is remarkably increased up to 3 K in the Sr2RuO4–Ru eutectic system, in which plate-like microdomains of Ru metal are embedded in the primary-phase Sr2RuO4. The phase diagram of the anisotropic upper critical field of the 3-K phase indicates that H c2 for the field parallel to the RuO2 plane is strongly suppressed at low temperatures. We argue that the reorientation of the Cooper-pair spin direction near the Sr2RuO4–Ru interface may be responsible for this suppression. In addition, we observed unusual hysteresis in the out-of-plane resistivity, ρ c , at low temperatures and near H c2, only when the field was applied parallel to the RuO2 plane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007700721913
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Stability of the low-temperature tetragonal phase in La2−x Ba x CuO4 and related compounds (1994)
    Springer
    Journal of superconductivity 7 (1994), S. 33-35 
    Details
    ISSN: 1572-9605
    Keywords: Low-temperature tetragonal (TLT) phase ; La2−x Ba x−y M y CuO4 (M=Sr or Ca) ; La2−x−y Nd y Ba x CuO4 ; ionic size
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract In La2−x Ba x CuO4 (LBCO), the structural transition to a low-temperature tetragonal phase below 60 K and suppression of superconductivity are observed when the carrier density isp ∼ 1 /8 per copper. The replacement by divalent ions smaller than Ba2+ suppresses the static deformation of the lattice. We have found that the variationsT d2 and superconducting transition temperatureT c are quantitatively characterized by the averaged ionic radius at the La site or lattice parameters. This aspect of substitution could be regarded as the effect of chemical pressure, since similar variations have been reported on applying hydrostatic pressure. In La2−x−y Nd y (Ba, Sr) x CuO4,T d2 increases with increasingy in a wide range ofp whileT c is suppressed only at p∼ l /8. The structural transition atT d2 here should be ascribed mainly to the crystallochemical origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00730363
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...