Colla Eugene V, Chao Lambert K, Weissman M B
Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801-3080, USA.
Phys Rev Lett. 2002 Jan 7;88(1):017601. doi: 10.1103/PhysRevLett.88.017601. Epub 2001 Dec 19.
Barkhausen noise, including both periodic and aperiodic components, is found in and near the relaxor regime of a familiar relaxor ferroelectric, PbMg(1/3)Nb(2/3)O3, driven by a periodic electric field. The temperature dependences of both the amplitude and spectral form show that the size of the coherent changes in the dipole moment shrink as the relaxor regime is entered, contrary to expectations based on some simple models.
