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  • Electronic Resource  (2)
  • 1990-1994  (2)
  • electrical anisotropy  (1)
  • flux creep  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Single-crystal growth and anisotropic electrical properties of (La1− xCa x )2CaCu2O6 (1994)
    Springer
    Journal of superconductivity 7 (1994), S. 313-318 
    Details
    ISSN: 1572-9605
    Keywords: (La, Ca)2CaCu2O6, single crystal ; TSFZ technique ; oxygen HIP ; electrical anisotropy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Large single crystals of (La1−x Ca x )2CaCu2O6 were synthesized by the travelling solvent floating zone (TSFZ) technique. The dimension of the grown boules was typically 4 mmφ×30 mm long with thec-axis perpendicular to the growth direction. After oxygen loading at 1080°C in 400 atm of O2, they became superconductive with a sharp transition at around 50 K. The resistivity was metallic both along thec-axis and within theab-plane, with an anisotropy ratio ofγ 2≡(ρ c/ρ ab ) ∼ 50 which is almost independent of temperature. Details of the crystal growth, heat treatment procedures, and the results of electrical and magnetic property measurements are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00724560
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetostriction of HTSC single crystals (1994)
    Springer
    Journal of superconductivity 7 (1994), S. 283-285 
    Details
    ISSN: 1572-9605
    Keywords: Magnetostriction ; pinning effect ; flux creep ; HTSC single crystals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We have measured the sample length change of HTSC single crystals in the superconducting state in a magnetic field. The magnetic field was applied parallel to the crystallinec-axis direction and was swept at a constant rate of 10 mT/s up to 6 T. The sample length change was measured along theab-plane direction, i.e., perpendicular to the field. We have found for the Bi2Sr2CaCu2O8 single crystals that the relative sample length change (ΔL/L) is extraordinarily large for a superconductor, on the order of 10−4. For the case of (La1−x Sr x )2CuO4, the amount of magnetostriction was not as large as for the Bi system, but the magnetostriction curves had many similarities. For both compounds, a relaxation phenomenon was observed when the field sweep was suspended at a certain field value. These observations are discussed in relation to flux line pinning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00724553
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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