2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26718By means of contactless mechanical method of the measurement of energy losses in superconductors, the anisotropy of dissipation processes has been studied in single crystal high-temperature layered superconductors of Yba2Cu3O7-d system, being in mixed state. The observed anisotropy of energy losses indicates the possibility of the existence of the symmetry of order parameter of dx2-y2 type in these single crystals.4 pages, 3 figuresSuperconductivityMaterials Sciencetext