Nano-indentation and avalanches in compressed porous SiO2

Beirau, Tobias; Salje, Ekhard K. H.

doi:10.1063/1.5117499

Cited by 5 publications

(2 citation statements)

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“…On a local scale, dynamic nanoindentation measurements has been used to probe the hardness, elastic modulus and material's resistance to penetration, as a function of the indentation depth [133]. This was done with a diamond Berkovich tip with a radius of about 100 nm driven at 100 Hz.…”

Section: Coelastic Materialsmentioning

confidence: 99%

Avalanches in ferroelectric, ferroelastic and coelastic materials: phase transition, domain switching and propagation

Nataf

Salje

2020

Ferroelectrics

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Section: Coelastic Materialsmentioning

confidence: 99%

Avalanches in ferroelectric, ferroelastic and coelastic materials: phase transition, domain switching and propagation

Nataf

Salje

2020

Ferroelectrics

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“…Indentation is one way to produce crackling noise in materials 13 , 14 , in addition to compression and bending 15 , 16 . Beirau and Salje investigated crackling noise avalanches in indentation measurements of mesoporous synthetic silica 14 , showing that mechanical properties are a function of depth and sensitive to chain reactions of collapsing pores during the indentation process. The crackling noise was shown to be power-law distributed with exponents of approximately 1.5 over several decades, confirming avalanche criticality.…”

Section: Introductionmentioning

confidence: 99%

Crackling noise microscopy

et al. 2023

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Crackling noise is a scale-invariant phenomenon found in various driven nonlinear dynamical material systems as a response to external stimuli such as force or external fields. Jerky material movements in the form of avalanches can span many orders of magnitude in size and follow universal scaling rules described by power laws. The concept was originally studied as Barkhausen noise in magnetic materials and now is used in diverse fields from earthquake research and building materials monitoring to fundamental research involving phase transitions and neural networks. Here, we demonstrate a method for nanoscale crackling noise measurements based on AFM nanoindentation, where the AFM probe can be used to study the crackling of individual nanoscale features, a technique we call crackling noise microscopy. The method is successfully applied to investigate the crackling of individual topological defects, i.e. ferroelectric domain walls. We show that critical exponents for avalanches are altered at these nanoscale features, leading to a suppression of mixed-criticality, which is otherwise present in domains. The presented concept opens the possibility of investigating the crackling of individual nanoscale features in a wide range of material systems.

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Avalanches during recrystallization in radiation-damaged pyrochlore and allanite: Statistical similarity to phase transitions in functional materials

Beirau

Shelyug

Navrotsky

et al. 2019

Applied Physics Letters

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Differential scanning calorimetry has been employed to analyze the jerky behavior of exothermic, structural reorganization processes of the highly disordered radiation-damaged uranium or thorium containing minerals pyrochlore and allanite. The thermal signals occur as thermal spikes forming crackling noise spectra. The energy of the thermal spikes follows power-law behavior with an exponent ε ∼ 1.61–1.65, which is in good agreement with force integrated energy distributions predicted by mean field theory. The recrystallization is hence statistically identical to the collapse of martensites under external pressure and the switching of ferroelectric materials.

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Nano-indentation and avalanches in compressed porous SiO2

Abstract: Remarkable p-type activation of heavily doped diamond accomplished by boron ion implantation at room temperature and subsequent annealing at relatively low temperatures of 1150 and 1300 °C

Cited by 5 publications

References 44 publications

Avalanches in ferroelectric, ferroelastic and coelastic materials: phase transition, domain switching and propagation

Avalanches in ferroelectric, ferroelastic and coelastic materials: phase transition, domain switching and propagation

Crackling noise microscopy

Avalanches during recrystallization in radiation-damaged pyrochlore and allanite: Statistical similarity to phase transitions in functional materials

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