Relaxation of the transport critical current in high-Tcpolycrystals

Critical Current Model for Polycrystalline Compounds with an Intrinsic Solid Solution of Two Mixed Superconductor Phases

“…The influence of the magnetic history on J c (H ) behavior can be introduced [12,13]. Mezzeti et al [14] tried to connect the properties of the superconductor family that the bulk consisted of with the size distribution of the junctions, so that the modeling was expanded for all H values.…”

Design of an Externally Driven Current Cloak

“…Lack of homogeneity in materials is generally assumed as deleterious: uncontrolled pores, second phase inclusions, grain boundaries and many other defects tend to weaken mechanical, electrical and magnetic properties [1][2][3][4][5][6]. In fact, one of the main aims of Materials Science is to improve fabrication methods in order to eliminate them.…”

A Description of the Transport Critical Current Behavior of Polycrystalline Superconductors Under the Applied Magnetic Field

“…Details of the technique and the experimental setup are in Ref. [14] and of the synthesis and sample characterization were published elsewhere [13].…”

“…Typical J c measurements are performed using the four-probe technique with automatic control of the sample temperature, the applied magnetic field and the bias current [14]. Details of the technique and the experimental setup are in Ref.…”

“…Considering these factors, Altshuler et al [14] and Muller and Matthews [15] introduced the possibility of calculating the J c (H) characteristic under any magnetic history following the proposal of Peterson and Ekin [16]. Basically the model considers that the transport properties of the junctions are determined by an "effective field" resulting from superposition of a external applied field and the field associated with magnetization of the superconducting grains.…”