Rama K. Vasudevan, M. Baris Okatan, Chen Duan, Yoshitaka Ehara, Hiroshi Funakubo, Amit Kumar, Stephen Jesse, Long-Qing Chen, Sergei V. Kalinin and Valanoor Nagarajan Nanoscale Origins of Nonlinear Behavior in Ferroic Thin Films Advanced Functional Materials 23
The nanoscale origins of Rayleigh behavior in ferroic materials have remained elusive, despite the widespread applicability of this phenomenological law. Using band-excitation piezoresponse force microscopy, individual nanoscale measurements on Pb(Zr,Ti)O3 films probe a distinctly non-Rayleigh regime. The collective average of the individual measurements leads directly to macroscopic Rayleigh-type nonlinearity. These results point to the nanoscale origins of nonlinearity in a variety of disordered ferroics.
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