Barkhausen Noise in a Relaxor Ferroelectric

Details Barkhausen Noise in a Relaxor Ferroelectric Barkhausen Noise in a Relaxor Ferroelectric

2001-09-26

arxiv.org/abs/cond-mat/0109485v1

Phys. Rev. Lett. 88, (2002), 017601

Physics

Condensed Matter

Materials Science

4 pages RevTeX4, 5 figures; submitted to Phys Rev Lett

Scientific paper

10.1103/PhysRevLett.88.017601

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$_{2/3}$O$_3$, driven by a periodic electric field. The temperature dependences of both the amplitude and spectral form show that the size of the coherent dipole moment changes shrink as the relaxor regime is entered, contrary to expectations based on some simple models.

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