Muon-method study of the superconductivity in YBa2Cu3O7
Barsov S. G. , Getalov A. L., Koptev V. P. , Kuz'min L. A., Mikirtychyants S. M. , Tarasov N. A. , Shcherbakov G. V. , Kotov N. M. , Nigmatulin A. S. , Mukovskii Ya. M. , Grebinnik V. G. , Duginov V. N., Zhukov V. A. , Lazarev A. B. , OI'shevskii V. G. , Shilov S. N. , Krasnoperov E. P.
A Meissner phase exists for the YBa2Cu307 system. The volume of the superconducting region is at least 80%. At Τ = 50 К, the value of Hcl is 3 5 Oe. The о penetration depth is λ0 = 3200 A. Irreversibility effects are observed.