Relaxation in bulk RBa2Cu3O7−δ superconductors
M. Jirsa, T. Nishizaki, N. Kobayashi, M. Muralidhar, M. Murakami
DOI 10.1103/PhysRevB.70.024525 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The shape of the magnetic hysteresis curve, “MHL,” in bulk strongly doped RBa2Cu3O7−δ materials is analyzed and its correlation with relaxation characteristics is verified. It is shown that field and temperature dependencies of logarithmic relaxation rate, Q=dlnJ∕dlndB∕dt, can be obtained from J(B) and J(T) data (J is the supercurrent density associated with total magnetic moment). In the case of the MHL with two well-distinguished peaks, the two additive contributions to J are correlated with corresponding relaxation characteristics, which are given analytically. Plateau in Q(T) dependence in such materials is shown to originate from scanning the specific shape of MHL at a fixed field. From Q(J) plot pinning energy characteristics at low and intermediate fields are deduced.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | unknown |
| (Nd0.33Eu0.38Gd0.28)Ba2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Magnetic ordering of Nd3+ ions in the high-temperature superconductor NbBa2Cu3−xGaxO7−y (0<x≤0.5 and 0.05<y<0.15)
similarity 0.95A. M. Niraimathi et al.
Source status unknown — claims are unverified
Superconductivity in bulk and thin films of La1.85Sr0.15CuO4−δ and Ba2YCu3O7−δ
similarity 0.95K. Moorjani et al.
Source status unknown — claims are unverified
Bulk-modulus anomalies at the superconducting transition of single-phase YBa2Cu3O7
similarity 0.95D. J. Bishop et al.
Source status unknown — claims are unverified
Correlations among c/b, Tc, and Madelung potentials in the system of RBa2Cu3Ox superconductors
similarity 0.94Shiow-Fon Tsay et al.
Source status unknown — claims are unverified
Relaxation-caused suppression of magnetization in superconducting YBa2Cu3O7−δ single crystals
similarity 0.94M. Wolf et al.
Source status unknown — claims are unverified
Universality in the current decay and flux creep of Y-Ba-Cu-O high-temperature superconductors
similarity 0.94Alexis P. Malozemoff & Matthew P. A. Fisher
Source status unknown — claims are unverified