1998/08/08 by S. K. Nikogosyan, A. A. Sahakyan, Nikogosyan, S. K. +7
Chemistry · Materials Science · Physics and Astronomy · #Chemistry #Composite material #Condensed Matter (cond-mat) #Condensed matter physics #FOS: Physical sciences #Hysteresis #Impurity #Intergranular corrosion #Magnetic Properties and Applications #Materials science #Microstructure #Physics #Physics of Superconductivity and Magnetism #Plateau (mathematics) #Superconductivity #Theoretical and Computational Physics #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9808086
6 pages, LaTex, 4 figures
arxiv created 1998/08/08 · openalex publication_date 1998/08/08 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The influence of the bulk density of YBa2Cu3-xFexOy (0 < x < 0.01) ceramics on the intergranular superconducting (SC) properties was studied using the temperature dependence of AC magnetic susceptibility measurements. It was found that the simultaneous variation of the sample's density and the iron impurity concentration does not influence effectively the onset temperature of the superconducting state Tc(on). While only increasing of the sample's density shifts the intergranular hysteresis losses peak temperature Tm(J) to the lower values which connects with the decreasing of the Josephson magnetic vortices pinning role. It was established that the shielding capability and Tm(J) display a plateau with X in the 0.003 < X < 0..007 region which is due to the monotonous decrease of the sample's density. It was shown that the shielding capability at the T=78K for the sample with 3.8g/cm3 is two times higher than that for the sample with the density of 5.0g/cm3. The possible interpretations of the observed results are discussed.