Barkhausen Noise Probes and Modelling: A Review

Santa-aho, Suvi; Laitinen, Arttu; Sorsa, Aki; Vippola, Minnamari

doi:10.1007/s10921-019-0636-z

Cited by 32 publications

(7 citation statements)

References 30 publications

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“…1,2 The analysis of the Barkhausen noise has emerged as a valuable technique for studying the dynamics of domain formation and domain wall motion in ferromagnets. 3,4 The similar effect representing the appearance of the Barkhausen pulses (BPs) in ferroelectrics was discovered in Rochelle salt 5 and was later studied in potassium dihydrogen phosphate, 6,7 barium titanate, [8][9][10] lithium niobate, 11 gadolinium molybdate, 12,13 and lithium tantalate crystals. 14 BPs manifest themselves as the sharp peaks in the switching current during the application of a constant or slow-varying external electric field.…”

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confidence: 83%

Barkhausen pulses caused by domain merging in congruent lithium niobate

Ахматханов

Kipenko

Есин

et al. 2020

Applied Physics Letters

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The analysis of the shapes of Barkhausen pulses (BPs) was used for the detailed characterization of the domain merging process in congruent lithium niobate LiNbO 3 (CLN) crystals. The BPs in ferroelectrics manifest themselves as the sharp peaks in a switching current during polarization reversal by the application of a constant or slow-varying external electric field. Three mechanisms of the BPs were previously proposed: domain nucleation, interaction of the domain walls with the pinning centers, and domain merging. We have revealed the domination of the domain merging mechanism for the generation of the BPs in CLN and classified the scenarios of domain structure evolution after merging in terms of the appearance and transformation of short-lived fast and superfast domain walls. We have shown that the input of merging events reaches 80% of the whole switching process. Two revealed types of BPs corresponding to the merging events considerably differ by duration and shape, thus opening the way for solution of the inverse problem-extracting the quantitative information about the domain kinetics by the analysis of the BPs. This analysis allows extracting the velocities of the fast and superfast walls and provides the possibility to go beyond the temporal resolution of the in situ imaging system in studying the superfast domain wall motion. The proposed analysis is applicable for the faceted growth of polygonal domains in any ferroelectric. It is necessary to point out that the analysis of the BPs allowed characterizing the main part of the domain evolution process in CLN as the fast domain transformations after merging prevail during the polarization reversal.

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confidence: 83%

Barkhausen pulses caused by domain merging in congruent lithium niobate

Ахматханов

Kipenko

Есин

et al. 2020

Applied Physics Letters

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“…The ideal way to observe this mechanism is through the so-called Magnetic Barkhausen Noise (MBN) technique [ 27 ]. Domain wall motions generate local flux variations that trigger discontinuous magnetic flux density displayed as a series of electrical pulses induced in an inductive magnetic sensor [ 28 ]. The domain number is vast, the wall motions can be assimilated to a stochastic process, and the MBN raw signal is erratic and not reproducible.…”

Section: The Magnetization Mechanisms: Definitionmentioning

confidence: 99%

Magnetic Signatures and Magnetization Mechanisms for Grinding Burns Detection and Evaluation

Ducharne,

Sebald,

Petitpré

et al. 2023

Sensors

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Grinding thermal damages, commonly called grinding burns occur when the grinding energy generates too much heat. Grinding burns modify the local hardness and can be a source of internal stress. Grinding burns will shorten the fatigue life of steel components and lead to severe failures. A typical way to detect grinding burns is the so-called nital etching method. This chemical technique is efficient but polluting. Methods based on the magnetization mechanisms are the alternative studied in this work. For this, two sets of structural steel specimens (18NiCr5-4 and X38Cr-Mo16-Tr) were metallurgically treated to induce increasing grinding burn levels. Hardness and surface stress pre-characterizations provided the study with mechanical data. Then, multiple magnetic responses (magnetic incremental permeability, magnetic Barkhausen noise, magnetic needle probe, etc.) were measured to establish the correlations between the magnetization mechanisms, the mechanical properties, and the grinding burn level. Owing to the experimental conditions and ratios between standard deviation and average values, mechanisms linked to the domain wall motions appear to be the most reliable. Coercivity obtained from the Barkhausen noise, or magnetic incremental permeability measurements, was revealed as the most correlated indicator (especially when the very strongly burned specimens were removed from the tested specimens list). Grinding burns, surface stress, and hardness were found to be weakly correlated. Thus, microstructural properties (dislocations, etc.) are suspected to be preponderant in the correlation with the magnetization mechanisms.

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“…For low-frequency BHN measurements near the surface, it was shown that in case-carburized steel, the residual stresses change differently compared to the subsurface in response to the prior applied tensile or compressive stresses [18]. Although BHN has been the subject of numerous studies, the results are difficult to compare because most studies differ in terms of the material and samples used [19]. Therefore, it can be concluded that a better understanding of how different factors influence BHN is still needed.…”

Section: State Of the Artmentioning

confidence: 99%

Experimental analysis on the influence of freeform bending on Barkhausen noise for steel tubes

Maier

2023

Materials Research Proceedings

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Abstract. Freeform bending with a movable die makes it possible to bend complex structures and seamless radii without changing the bending tools. Currently, most research focuses on minimizing the geometrical deviations without considering the mechanical properties of the bent tubes. A previous work showed, that the geometry can be decoupled from the mechanical properties with non-tangential bending [1]. The implementation of a soft sensor based on ultrasonic contact impedance measurements (UCI) of the property-controlled freeform bending has also been examined [2], as well as a structure for closed-loop control based on material properties [3]. The present work deals with a micro-magnetic sensor and Barkhausen noise (BHN) and investigates its suitability for the closed-loop control. For this purpose, different processing routes for freeform-bent steel tubes are experimentally investigated by their characteristic BHN. In addition to an existing simulation model, a data basis for the impact of freeform bending parameters is built to extend the existing model of a property-based closed-loop control.

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Barkhausen Noise Probes and Modelling: A Review

Cited by 32 publications

References 30 publications

Barkhausen pulses caused by domain merging in congruent lithium niobate

Barkhausen pulses caused by domain merging in congruent lithium niobate

Magnetic Signatures and Magnetization Mechanisms for Grinding Burns Detection and Evaluation

Experimental analysis on the influence of freeform bending on Barkhausen noise for steel tubes

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