Antoine, C.Z. Aburas, M. Four, A. Hayano, H. Iwashita, Y. Kato, S. Kubo, T. Saeki, T. JACoW Geneva, Switzerland 978-3-95450-191-5 10.18429/JACoW-SRF2017-TUYBA01 English 368-373 TUYBA01 ion SRF cavity site niobium Contribution to a conference proceedings 2018 2018-01 https://doi.org/10.18429/JACoW-SRF2017-TUYBA01 http://jacow.org/srf2017/papers/tuyba01.pdf Multilayers MgO/NbN/MgO/Nb with several thicknesses are being tested by local magnetometry, Scanning tunneling and various standard structural techniques experiment providing usefull information to compare experiments and recent theoretical advances proposed by A. Gurevich or T. Kubo.