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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic-relaxation study in melt-textured ErBa2Cu3O7−δ ceramic material (1994)
    Springer
    Applied physics 59 (1994), S. 169-172 
    Details
    ISSN: 1432-0630
    Keywords: 74.60.Ge ; 74.25.Ha ; 74.80.Bj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have studied the zero-field-cooled magnetic relaxation in the melt-textured ErBa2Cu3O7−δ ceramic material. The magnetic relaxation rate dM/d (ln t) exhibits strong temperature and field dependence in the temperature range up to 80 K and the field range up to 5.5 T. The magnetic relaxation behavior observed in the melt-textured ErBa2Cu3O7−δ ceramic sample is similar to that in single crystals. The magnetization to noise ratio is much improved, in particular, for temperatures approaching the superconducting transition temperature and for low magnetic fields. Several theoretical models were explored to fit the experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00332211
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  • 2
    Electronic Resource
    Electronic Resource
    A comparative study of magnetic relaxation in YBa2Cu3−x Fe x O7−y single crystals (1993)
    Springer
    Applied physics 56 (1993), S. 381-384 
    Details
    ISSN: 1432-0630
    Keywords: 74.60.Ge ; 74.60.Mj ; 74.60.Jg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The zero-field-cooled magnetization relaxation has been studied over wide temperature and field ranges on iron-doped YBa2Cu3O7−y single crystals. The relationship between the twin boundary density, which depends on the iron composition, and the pinning strength of the flux lines is determined systematically. For magnetic fields up to 1 T the inductive critical current density decreases as the iron composition increases. The Bean critical state model and the Anderson-Kim thermally activated flux-creep model are utilized to analyze and interpret the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324359
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  • 3
    Electronic Resource
    Electronic Resource
    Macroscopic magnetic properties in TlBa2Ca3Cu4O−δ−δ−δ single crystals (1996)
    Springer
    Journal of low temperature physics 105 (1996), S. 999-1004 
    Details
    ISSN: 1573-7357
    Keywords: 74.60.−w ; 74.60.Ge ; 74.30.Ci
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The four-CuO2-layer TlBa2Ca3Cu4O11−δ compound has a high superconducting transition temperature of 128 K and strong interlayer coupling. We have performed magnetic experiments on single crystals of TlBa2Ca3Cu4O11−δ, which include hysteresis loop, irreversibility line and time relaxation measurements. From these measurements, we observed the large critical current density, high irreversibility line and strongly temperature dependent flux creep rate in the TlBa2Ca3Cu4O11-gd single crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00768513
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