Temperature dependent criticality of Barkhausen noise in thin Fe films

Zani, Maurizio; Puppin, E.

doi:10.1016/j.jmmm.2003.12.191

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…Experimental data indicate that the critical exponent α characterizing the Barkhausen noise distribution decreases with the temperature [19,20]. Figure 8 shows how the critical exponent depends on the temperature in the temperature range examined above.…”

Section: Critical Exponentmentioning

confidence: 94%

“…Such coefficient α is defined by the power-law distribution for the amplitude m of the magnetization jumps taking place inside the material during the magnetization process: P( m) ∼ ( m) −α . The exponent α exhibits a remarkable tem-perature dependence [19,20]. More precisely, it raises from α = 1 at room temperature to α = 1.8 at low temperatures (T = 10 K).…”

Section: Introductionmentioning

confidence: 98%

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Temperature-dependent criticality in random 2D Ising models

et al. 2021

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We consider 2D random Ising ferromagnetic models, where quenched disorder is represented either by random local magnetic fields (random-field Ising model) or by a random distribution of interaction couplings (random-bond Ising model). In both cases, we first perform zero- and finite-temperature Monte Carlo simulations to determine how the critical temperature depends on the disorder parameter. We then focus on the reversal transition triggered by an external field and study the associated Barkhausen noise. Our main result is that the critical exponents characterizing the power law associated with the Barkhausen noise exhibit a temperature dependence in line with existing experimental observations.

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Section: Critical Exponentmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 98%

Temperature-dependent criticality in random 2D Ising models

et al. 2021

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“…Such coefficient α is defined by the power law distribution for the amplitude ∆m of the magnetization jumps taking place inside the material during the magnetization process: P (∆m) ∼ (∆m) −α . The exponent α exhibits a remarkable temperature dependence [19,20]. More precisely it raises from α = 1 at room temperature to α = 1.8 at low temperatures (T = 10 K).…”

Section: Introductionmentioning

confidence: 98%

Temperature-dependent criticality in random 2D Ising models

Metra,

Zorrilla,

Zani

et al. 2021

Preprint

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We consider 2D random Ising ferromagnetic models, where quenched disorder is represented either by random local magnetic fields (Random Field Ising Model) or by a random distribution of interaction couplings (Random Bond Ising Model). In both cases we first perform zero-and finite-temperature Monte-Carlo simulations to determine how the critical temperature depends on the disorder parameter. We then focus on the reversal transition triggered by an external field, and study the associated Barkhausen noise. Our main result is that the critical exponents characterizing the power-law associated with the Barkhausen noise exhibit a temperature dependence in line with existing experimental observations.

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Breakdown of Barkhausen Criticality in an Ultrathin Ferromagnetic Film

Roy

Kumar

2020

J Supercond Nov Magn

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Temperature dependent criticality of Barkhausen noise in thin Fe films

Cited by 5 publications

References 6 publications

Temperature-dependent criticality in random 2D Ising models

Temperature-dependent criticality in random 2D Ising models

Temperature-dependent criticality in random 2D Ising models

Breakdown of Barkhausen Criticality in an Ultrathin Ferromagnetic Film

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