Effect of low-temperature annealing on the magnetization curve of YBa2Cu3O6 + x ceramics
M. K. AlievResearch Institute of Applied Physics, National University of Uzbekistan, Tashkent, 100174, UzbekistanG. R. AlimovResearch Institute of Applied Physics, National University of Uzbekistan, Tashkent, 100174, UzbekistanR.R. VildanovResearch Institute of Applied Physics, National University of Uzbekistan, Tashkent, UzbekistanB. Yu. SokolovResearch Institute of Applied Physics, National University of Uzbekistan, Tashkent, 100174, Uzbekistan
ABI
Аннотация
The effect of low-temperature annealing on the magnetization curve of YBa2Cu3O6 + x ceramics in the superconducting state (x ≈ 0.9) is investigated. When the annealing time is fairly long, the field dependence of magnetic moment M exhibits a feature in the form of a plateau, where the value of M remains almost constant. The evolution of this feature in the magnetization curves of annealed samples with annealing time and temperature is studied. It is assumed that low-temperature annealing gives rise to metastable ferromagnetic clusters in YBa2Cu3O6 + x ceramics, the contribution of which to the magnetic moment accounts for the feature in the magnetization curves of the annealed samples.
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