La-doping effects on pinning properties of MgB2

Intrinsic pinning properties of FeSe0.5Te0.5

“…In this report, we analyze J c from B⊥c-axis magnetization with extended critical state model by Kimishima [9][10][11] based on the well-known Kim model [15] and Bean model [16]. In this model the value of the internal critical current density …”

“…Here, we report the intrinsic pinning properties of FeSe 0.5 Te 0.5 , which is the superconductor with T c of about 14 K, were studied by the analysis of magnetization curves by the extended critical state model by Kimishima [9][10][11].…”

Complete flux jump in bulk MgB2 sintered under high pressure

“…The results of CuKa powder X-ray diffractions (XRD) are shown in Fig. 1 gas [12][13][14]. We call this non-doped MgB 2 , sintered in the reductive atmosphere, as RE sample.…”

Vacancy Induced Ferromagnetism of MgO in MgB₂ Superconductor

“…The B 0 can be called the cross-over flux density between Bean [20] and Anderson-Kim [21] states. Analyses of ZFC M m (H)-curves were performed using the equations given in earlier papers [17][18][19]. The parameters of B eq * and B 0 were evaluated from the least square The J c /J c (0) of 150 rpm milled sample, which was sintered in air at 573 K for 3 hours, is also shown in Fig.10 by the open symbols.…”