Aging Effect on Electrical Conductivity of Pure and Al-Doped YBa₂Cu₃O_7−δ Single Crystals with a Given Topology of Planar Defects

Table 1

Resistivity parameters of the as-grown and aged samples.

No	Sample	𝑇𝑐, K	𝜌𝑎𝑏 (300 K), 𝜇Ωcm	𝑇^∗, K	Δ^∗𝑎𝑏, meV	tan𝛼3D	tan𝛼2D	𝜀0	𝜉𝑐(0), Å
K1	as-grown	91.75	151	138	88.7	−0.508	−1.084	0.061	1.45
	aged	90.83	196	167	66.3	−0.503	−1.062	0.088	1.74
K2	as-grown	92.05	421	199	58.1	−0.506	−0.990	0.157	2.32
	aged	90.85	453	228	45.5	−0.495	−1.017	0.188	2.54