Scaling Law of the Pinning Forces in Nonideal Type II Superconductors

Abstract

Fon and Lim have reported 1 I-state and 19-state R-matrix calculations of 1%-2's differential cross sections at low energies. The same R-matrix calculations of Fon and Lim are now extended to obtain the differential CTOSS seaions for excitation of the ground State of helium to the 2% and Z' P states. Convergence studies are carried out between the R-matrix calculations and comparisons are made between the R-matrix calculations and experiments. The 19-state R-matrix results are presented at scattering angles 30", 55", 60", 90", 120", 125" and 140" from the excitation thresholds up to 23.8 eV. The calculations are performed at more than seven hundred energy paints in order ta depict the observed resonant profiles.

Observation of strong intrinsic pinning in MgB2films

“…In the case of the single-crystalline sample of MgB 2 -(A), the normalized flux pinning force f p (h) is scaled well by the relation of f p (h) ∝ h 0.5 (1 − h) 1.3 , plotted by the dashed line as shown in figures 4(a) and (b). This relation is close to the scaling formula for flux pinning, f p (h) ∝ h 0.5 (1 − h), originating from weak dislocations [40]. Weak dislocations were observed to be the main defects in MgB 2 -(A) by using a transmission electron microscope (TEM) and two-beam conditions [41].…”

Upper Critical Field Deduced from Critical Current Data

“…Calculations performed for LaMo,S, and PbMo,S, thin film critical current data have shown a very good fitting of the pinning force density by (6). An example is shown in Pig.…”

Signature of Non-thermal Phase Transition under Self Affine Scaling Scenario in High Energy Target Fragmentation

“…In [40]. Weak dislocations were observed to be the main defects in MgB 2 -(A) by using a transmission electron microscope (TEM) and two-beam conditions [41].…”