Internal friction phenomena in composites based on PZT-type ferroelectric powder and ferrites Radosław Zachariasz, Dariusz Bochenek and Joanna Bartkowska Eur. Phys. J. B, 89 2 (2016) 25 Published online: 01 February 2016 DOI: 10.1140/epjb/e2015-60490-9