The temperature and angular dependence of the irreversibility field of YBa2Cu3Oy (6.6≤y≤6.9) single crystals have been investigated by magnetic measurements in magnetic fields up to 55kOe. The angular dependence of Hirr is well described by the expression, HirrlnHirr∝1/(cos2θ+γ-2sin2θ) 1 2, which is expected from the flux creep model. The γ value is in good agreement with the effective mass ratio obtained from the angular dependence of the resistive transition.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering