Silver addition in La2CuO4 ceramics

Polaronic relaxation in Ca2TiMnO6 at low temperatures

“…In our previous paper, a relation similar to the Fermi-Dirac distribution function was suggested to describe the concentration of the frozen polarons [23]. Hence, the number of the hopping polarons can be written as [24]:…”

Effect of low-temperature treatment and subsequent high-temperature annealing on the critical current density of YBa2Cu3O y

“…They featured also a low T c (~88 K) [4]. Incidentally, the presence of silver particles was shown to hinder noticeably recrystallization of grains [12], and this probably accounts for the slower anneal ing of the structural defects that formed in the course of the low temperature treatment. As a result, too many structural defects still remain in existence after the 1 h treatment at T = 930°C, which entails degra dation of the critical characteristics.…”

“…3). It may be attributed to the silver particles making the coupling among the crystallites stronger [9,12]. Figure 5 plots field dependences of the pinning force calculated with the relation F p = j c B [13].…”