Interface magnetoelectric effect in the layered heterostructures with Co layers on the polished and ion-beam planarized ceramic PZT substratesAlexandre I. Stognij, Nickolaj Novitskii, Natalia Poddubnaya, Sergei Sharko, Valerij Ketsko, Vladimir Mikhailov, Vladimir Dyakonov and Henryk SzymczakEur. Phys. J. Appl. Phys., 69 1 (2015) 11301DOI: https://doi.org/10.1051/epjap/2014140402