Double Hysteresis Loop in BaTiO3-Based Ferroelectric Ceramics

Yun, Sining

doi:10.5772/16502

Cited by 5 publications

(2 citation statements)

References 50 publications

(95 reference statements)

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“…the presence of noncentrosymmetry [64,65]. As in the cubic phase, no permanent dipole should exist, hence the PE curve is expected to be linear [66]. PE data of all the prepared samples have been presented in figure 6 and from this figure, it is clear that all the samples including those having Hf concentration greater than 12% show a very clear hysteresis loop.…”

Section: Pe Measurementsmentioning

confidence: 94%

Origin of ferroelectricity in cubic phase of Hf substituted BaTiO₃

Sati

Pokhriyal

Kumar

et al. 2021

J. Phys.: Condens. Matter

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The origin of ferroelectricity in the cubic phase of BaTi1−x Hf x O3 has been investigated. The presence of well-defined ferroelectric polarization versus electric field (PE) hysteresis loop in the samples with global cubic symmetry suggests the presence of ‘local polar regions’, induced possibly due to the huge difference in the electronegativity and also difference in the ionic radii of Hf+4 and Ti+4 ions, which may lead to local structural disorder. The presence of polar regions is also supported through the appearance of A1(TO) polar mode in Raman spectra which in principle should be absent in the samples with cubic symmetry. The results are discussed in terms of disorder-induced local dipoles due to the electronegativity difference between Hf and Ti ions.

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Section: Pe Measurementsmentioning

confidence: 94%

Origin of ferroelectricity in cubic phase of Hf substituted BaTiO₃

Sati

Pokhriyal

Kumar

et al. 2021

J. Phys.: Condens. Matter

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“…At all frequencies, the polarization curves show typical ferroelectric hysteresis loops but with varying polarization values owing to the different response of ferroelectric domains toward the applied frequencies. It can be seen from the figure that the polarization curve measured at 10 Hz is wavy that maybe perhaps due to the leakage current contributed by the free charges due to conductive surface or defects induced due to heat treatment of HT-Ti 3 C 2 T x MXene film [33][34][35] . The P-E loops retain their ferroelectric nature at all frequencies however, at relatively higher frequencies, the P-E loops become more linear keeping intact its remanence effect that could be attributed to the suppression of dipole switching 36 .…”

Section: Ferroelectric Analysismentioning

confidence: 99%

Multiferroic and ferroelectric phases revealed in 2D Ti3C2Tx MXene film for high performance resistive data storage devices

et al. 2023

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Multiferroic materials, showing simultaneous ferroelectric and ferromagnetic orders, are considered to be promising candidates for future data storage technology however, the multiferroic phenomenon in two-dimensional (2D) materials is rarely observed. We report a simple approach to observe frequency-dependent ferroelectricity and multiferroicity in 2D Ti3C2Tx MXene film at room-temperature. To study the frequency and poling effect on ferroelectricity, we performed electric polarization vs. electric field (P-E) measurement at different frequencies, measured under zero and non-zero static magnetic fields. The results not only indicate a clear frequency dependence of electric domains owing to varying time relaxation during reversal dynamic but also showed magnetic field control of electric polarization thus, confirmed the presence of strong magneto-electric (ME) coupling at room-temperature. The existence of ME coupling was attributed to the coupling between disordered electric dipoles with local spin moments as well reduced dielectric loss after heat-treatment. Moreover, the ferroelectric Ti3C2Tx MXene film was employed as an active layer within the resistive data storage device that showed a stable switching behavior along with improved on/off ratio in comparison to non-ferroelectric Ti3C2Tx active layer. The unique multiferroic behavior along with ferroelectric-tuned data storage devices reported here, will help understand the intrinsic nature of 2D materials and will advance the 2D ferroelectric data storage industry.

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