A nucleation-growth model for ferroelectric hysteresis loops with complete and partial switching

Ricinschi, Dan; Okuyama, Masanori

doi:10.1016/j.jeurceramsoc.2005.03.056

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…4 shows that the number of pulses required to completely switch the polarization dramatically increases up to 10 10 and the partial switching states resolution increases as well. Thus, in artificial intelligence applications In order to explain these experimental findings, we will refer to the results of model simulations of the polarization reversal process, done under the framework of a Landau theory based lattice model, and discussed in some of our previous publications [10][11][12]. The calculations have revealed that switching induced by a strong electric field involves an evolution starting from many small reversed domains, while in case of a weak field the polarization reversal is triggered from a few domains that tend to become very large in size.…”

Section: Resultsmentioning

confidence: 99%

Study of partially-switched states of ferroelectrics in relation to the spatial inhomogeneity of their domain structure

Ricinschi

Okuyama

2008

J Electroceram

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In this paper we reexamine the possibility of using ferroelectric materials for adaptive learning artificial intelligence applications, by exploiting their capability to be set in electrically-controlled multivalue polarization states. Our experiments on a Pb(Zr,Ti)O 3 ceramic sample consisted in conveniently selecting the input pulse electric field and temperature of the sample during field application, in order to create partially-switched states. Employing strong/ weak electric field pulses allows to control the analog polarization levels by a linear or logarithmic addition of pulses. The partially-switched states are mapped with enhanced resolution when domains with dissimilar evolution stages are present. Applying electric fields while heating the sample allows to reduce the switching time and shifts down the switching threshold. Thus, in addition to artificial intelligence applications, these results provide hints for energy-saving devices that exploit the intrinsic high mobility of small fluctuating domains.

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Section: Resultsmentioning

confidence: 99%

Study of partially-switched states of ferroelectrics in relation to the spatial inhomogeneity of their domain structure

Ricinschi

Okuyama

2008

J Electroceram

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“…Minor M-H curves are reported when they resemble the working field of a practical application [12][13][14]. Experimentally obtained ferroelectric minor hysteresis loops of polycrystalline Pb(Zr,Ti)O 3 (PZT) have been reported in the context of the Preisach model of hysteresis [15] and nucleation-growth model of ferroelectric switching based on the Gibbs-Landau-Devonshire theory [16]. There are a number of different measurement protocols where the field is applied and reversed in a controlled fashion, while not reaching saturation on both sides of the loop.…”

Section: Introductionmentioning

confidence: 96%

The anhysteretic polarisation of ferroelectrics

Kaeswurm¹,

Segouin²,

Daniel³

et al. 2018

J. Phys. D: Appl. Phys.

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Measurement and calculation of anhysteretic curves is a well-established method in the field of magnetic materials and is applied to ferroelectric materials here. The anhysteretic curve is linked to a stable equilibrium state in the domain structure, and ignores dissipative effects related to mechanisms such as domain wall pinning. In this study, an experimental method for characterising the anhysteretic behaviour of ferroelectrics is presented, which is subsequently used to determine the anhysteretic polarisation response of polycrystalline barium titanate and a doped lead zirconate titanate composition at room temperature. Various external parameters, such as electric field, stress, and temperature, can significantly affect ferroelectric behaviour. Ferroelectric hysteresis curves can assess the importance of such effects but cannot distinguish their contribution on the different intrinsic and extrinsic mechanisms involved in ferroelectric behaviour. In this work, the influence of compressive stress on the anhysteretic polarisation is measured and discussed. The comparison of the polarization loop to the anhysteretic curve under compressive stress elucidates the effects on the stable equilibrium domain configuration and dynamic effects associated to dissipation.

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