### Abstract

Ferroelectric-field switching in BaTiO3 generates "Barkhausen noise" when domain walls are displaced. We show by acoustic emission spectroscopy that electric-field switching of 90? boundaries generates large strain fields, which emit acoustic phonons during ferroelectric hysteresis measurements. We use highly sensitive receivers (microphones) to measure the time sequences of noise in close analogy to noise patterns in ferroelastic and magnetic materials. Domain-wall interactions and jamming generate the "crackling noise" that follows scale invariant avalanche dynamics: the avalanche energy and amplitude probability distribution functions follow power laws with exponents ?=1.65 (energy) and τ′ = 2.25 (amplitudes). Aftershocks are very common and follow Omori law with probability ∼t-p where t is the time elapsed after the main shock and p is the Omori exponent p∼1. The interevent times follow a double power-law distribution with exponents 0.9 for small times and 2.2 for the larger times. The scaling behavior is consistent with predictions of mean field theory.

Original language | English (US) |
---|---|

Article number | 014415 |

Journal | Physical Review Materials |

Volume | 3 |

Issue number | 1 |

DOIs | |

State | Published - Jan 1 2019 |

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### ASJC Scopus subject areas

- Materials Science(all)
- Physics and Astronomy (miscellaneous)

### Cite this

*Physical Review Materials*,

*3*(1), [014415]. https://doi.org/10.1103/PhysRevMaterials.3.014415

**Ferroelectric switching and scale invariant avalanches in BaTi O3.** / Salje, E. K.H.; Xue, D.; Ding, X.; Dahmen, Karin A; Scott, J. F.

Research output: Contribution to journal › Article

*Physical Review Materials*, vol. 3, no. 1, 014415. https://doi.org/10.1103/PhysRevMaterials.3.014415

}

TY - JOUR

T1 - Ferroelectric switching and scale invariant avalanches in BaTi O3

AU - Salje, E. K.H.

AU - Xue, D.

AU - Ding, X.

AU - Dahmen, Karin A

AU - Scott, J. F.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Ferroelectric-field switching in BaTiO3 generates "Barkhausen noise" when domain walls are displaced. We show by acoustic emission spectroscopy that electric-field switching of 90? boundaries generates large strain fields, which emit acoustic phonons during ferroelectric hysteresis measurements. We use highly sensitive receivers (microphones) to measure the time sequences of noise in close analogy to noise patterns in ferroelastic and magnetic materials. Domain-wall interactions and jamming generate the "crackling noise" that follows scale invariant avalanche dynamics: the avalanche energy and amplitude probability distribution functions follow power laws with exponents ?=1.65 (energy) and τ′ = 2.25 (amplitudes). Aftershocks are very common and follow Omori law with probability ∼t-p where t is the time elapsed after the main shock and p is the Omori exponent p∼1. The interevent times follow a double power-law distribution with exponents 0.9 for small times and 2.2 for the larger times. The scaling behavior is consistent with predictions of mean field theory.

AB - Ferroelectric-field switching in BaTiO3 generates "Barkhausen noise" when domain walls are displaced. We show by acoustic emission spectroscopy that electric-field switching of 90? boundaries generates large strain fields, which emit acoustic phonons during ferroelectric hysteresis measurements. We use highly sensitive receivers (microphones) to measure the time sequences of noise in close analogy to noise patterns in ferroelastic and magnetic materials. Domain-wall interactions and jamming generate the "crackling noise" that follows scale invariant avalanche dynamics: the avalanche energy and amplitude probability distribution functions follow power laws with exponents ?=1.65 (energy) and τ′ = 2.25 (amplitudes). Aftershocks are very common and follow Omori law with probability ∼t-p where t is the time elapsed after the main shock and p is the Omori exponent p∼1. The interevent times follow a double power-law distribution with exponents 0.9 for small times and 2.2 for the larger times. The scaling behavior is consistent with predictions of mean field theory.

UR - http://www.scopus.com/inward/record.url?scp=85061002448&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85061002448&partnerID=8YFLogxK

U2 - 10.1103/PhysRevMaterials.3.014415

DO - 10.1103/PhysRevMaterials.3.014415

M3 - Article

AN - SCOPUS:85061002448

VL - 3

JO - Physical Review Materials

JF - Physical Review Materials

SN - 2475-9953

IS - 1

M1 - 014415

ER -