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CRITICAL CURRENTS AND RELAXATION EFFECTS IN ND(2-X)CE(X)CUO(4-Y) SINGLE CRYSTALS.

Author(s) : FONTCUBERTA J.

Type of article: Article

Summary

INDUCTIVE CRITICAL CURRENT AND FIELD COOLED (FC) MAGNETIC RELAXATION MEASUREMENTS WERE CARRIED OUT ON A ND(2-X)CE(X)CUO(4-Y) (X = 0.15) SINGLE CRYSTAL FOR H PARALLEL TO C-AXIS. A ZERO FIELD CRITICAL CURRENT DENSITY VALUE OF 150,000 A/CM2 WAS OBTAINED AT 4.2 K, TOGETHER WITH LOGARITHMIC MAGNETIC FIELD DEPENDENCE. THE RELAXATION DATA COLLECTED AFTER A FC PROCESS REVEALED A LOGARITHMIC TIME DEPENDENCE. AT 4.2 K, TWO CLEARLY DIFFERENT TIME DEPENDENCES WERE OBSERVED OVER DISTINCT TIME SCALES. ALTERNATING-CURRENT SUSCEPTIBILITY DATA SHOW A TWO-STEP DIAMAGNETIC RESPONSE BELOW CRITICAL TEMPERATURE AND COMPLETE MAGNETIC SHIELDING AT 4.2 K AND 1.1 OERSTED. THE DIRECT-CURRENT SUSCEPTIBILITY REVEALS UNUSUAL BEHAVIOUR NEAR CRITICAL TEMPERATURE AND PARAMAGNETIC RARE EARTH POLARIZATION AT 4.2 K.

Details

  • Original title: CRITICAL CURRENTS AND RELAXATION EFFECTS IN ND(2-X)CE(X)CUO(4-Y) SINGLE CRYSTALS.
  • Record ID : 1991-1980
  • Languages: English
  • Source: Cryogenics - vol. 30 - n. 7
  • Publication date: 1990

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