Lee, J.Y. Kim, Y.H. Hahn, T.-S. Choi, S.S. 2024-01-21T19:16:07Z 2024-01-21T19:16:07Z 2021-09-02 1996-09 0003-6951 https://pubs.kist.re.kr/handle/201004/144346 We report a method that allows the measurement of the absolute size of the magnetic penetration depth λ(T) of large area YBa2Cu3O7-δ films using the two-coil method where a YBa2Cu3O7-δ film is overlapped with a 1-μm-thick Pb film equivalent in size placed in the gap between the drive and receive coil. The drive coil has fewer counter turns on the top section than the bottom, which is closer to the film, so the film's edge current would be suppressed and the accuracy that depends on geometry is greatly improved. The transition of the Pb film causes a steplike portion in the mutual inductance W(T) graph and the resultant step height leads to the absolute value of λ. ？ 1996 American Institute of Physics. English American Institute of Physics Inc. Calculations Electric coils Electric currents Lead Magnetic fields Measurement errors Superconducting films Yttrium compounds Large area films Magnetic penetration depth Mutual inductance graph Two coil method Yttrium barium cuprate Magnetic variables measurement Determining the absolute value of penetration depth of large area films Article 10.1063/1.117056 1 Applied Physics Letters, v.69, no.11, pp.1637 - 1639 Applied Physics Letters 69 11 1637 1639 scopus 2-s2.0-0030576835 Article Calculations Electric coils Electric currents Lead Magnetic fields Measurement errors Superconducting films Yttrium compounds Large area films Magnetic penetration depth Mutual inductance graph Two coil method Yttrium barium cuprate Magnetic variables measurement