Mechanical stress-induced switching kinetics of ferroelectric thin films at the nanoscale

Alsubaie, Abdullah; Sharma, Pankaj; Liu, G; Valanoor, Nagarajan; Seidel, Jan

doi:10.1088/1361-6528/aa536d

Cited by 24 publications

(20 citation statements)

References 40 publications

(61 reference statements)

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“…Straining the sample led also to another change in the structural properties-increase in the PZT tetragonality, which in turn was accompanied by an increase of the remanent piezoresponse as well as the area integrated within the hysteresis loop. We suggest that these observations are in agreement with the existing literature related to the effects of either lattice matching engineering (by means of varying the substrates) [1,[29][30][31] or in situ bending [11,12,32] on the hysteresis loop and stability of switched domains. However, the in situ strain tunability during structural and functional characterization allows bridging between these two effects of substrate clamping and flexing in ferroelectrics, i.e., between the effects of intrinsic and extrinsic strains (note that the strain tunability is not limited for compensating substrate clamping and that strain can be continuously controlled in this cross-characterization technique).…”

Section: Discussionsupporting

confidence: 92%

Enhanced Ferroelectric Functionality in Flexible Lead Zirconate Titanate Films with In Situ Substrate‐Clamping Compensation

Winestook

Saguy

Hao

et al. 2019

Adv Elect Materials

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Much attention has recently been given to flexible and wearable integrated electronic devices, with a strong emphasis on real‐time sensing, computing, and communication technologies. Thin ferroelectric films exhibit switchable polarization and strong electromechanical coupling, and hence are in widespread use in such technologies, albeit not when flexed. Effects of extrinsic strain on thin ferroelectric films are still unclear, mainly due to the lack of suitable experimental systems that allow cross structural–functional characterization with in situ straining. Moreover, although the effects of intrinsic strain on ferroelectric films, e.g., due to film–substrate lattice mismatch, have been extensively investigated, it is unclear how these effects are influenced by external strain. A method to strain thin films homogenously in situ is developed, allowing structural characterization as well as functional switching and piezorsponse measurements at the nanoscale, while retaining the sample under constant straining conditions. Using this method, thin films of PbZr0.2Ti0.8O3, which were grown on a flexible mica substrate, are strained to reduce substrate clamping effects and increase the tetragonality. Consequently, the domain stability is increased, the coercive field value is decreased, and imprint effects are reduced. This method also allows direct characterization of the relationship between the lattice parameters and nanoscale properties of other flexible materials.

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Section: Discussionsupporting

confidence: 92%

Enhanced Ferroelectric Functionality in Flexible Lead Zirconate Titanate Films with In Situ Substrate‐Clamping Compensation

Winestook

Saguy

Hao

et al. 2019

Adv Elect Materials

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“…Furthermore, electric bias induced correlated ferroelectric and phase switching were investigated by PFM, and the strength of EMC was found to be dependent of the thickness of BFO film . On the other hand, stress‐induced ferroelectric switching kinetics of PZT film have been studied using the similar method …”

Section: Examples Of Materials Systems Investigated Using Spm Techniquesmentioning

confidence: 99%

Probing of Local Multifield Coupling Phenomena of Advanced Materials by Scanning Probe Microscopy Techniques

Zeng

2018

Advanced Materials

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The characterization of the local multifield coupling phenomenon (MCP) in various functional/structural materials by using scanning probe microscopy (SPM)-based techniques is comprehensively reviewed. Understanding MCP has great scientific and engineering significance in materials science and engineering, as in many practical applications, materials and devices are operated under a combination of multiple physical fields, such as electric, magnetic, optical, chemical and force fields, and working environments, such as different atmospheres, large temperature fluctuations, humidity, or acidic space. The materials' responses to the synergetic effects of the multifield (physical and environmental) determine the functionalities, performance, lifetime of the materials, and even the devices' manufacturing. SPM techniques are effective and powerful tools to characterize the local effects of MCP. Here, an introduction of the local MCP, the descriptions of several important SPM techniques, especially the electrical, mechanical, chemical, and optical related techniques, and the applications of SPM techniques to investigate the local phenomena and mechanisms in oxide materials, energy materials, biomaterials, and supramolecular materials are covered. Finally, an outlook of the MCP and SPM techniques in materials research is discussed.Multifield Coupling temperature, moisture, and atmosphere. The studies of multifield coupling phenomena (MCP) are important for functional and structural materials because they are often operated under several external stimuli simultaneously in real applications. In the area of multifield coupling, a group of researchers have dedicated to the computational and modeling works in order to explain

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“…Multifunctional bismuth ferrite (BFO), with coupled magnetic, electromechanical, semiconducting and nonlinear optical properties at room temperature, is a promising material for applications ranging from magnetoelectric information storage, spintronic devices, nano-and micro-electromechanical systems, to switchable diodes and integrated electrooptical and electroacoustic elements [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Electromechanical-mnemonic effects in BiFeO3 for electric field history-dependent crystallographic phase patterning

et al. 2018

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Strained bismuth ferrite thin films unite a wealth of functional properties including ferroelectricity, ferromagnetism, electrooptic coupling and interface-mediated conductivity. The coexistence of rhombohedral (R) and tetragonal (T) phases in these films further contributes to their versatility, as structural transitions can modify functional behaviour and be leveraged to engineer properties such as electrochromism, magnetic characteristics, electromechanical response and charge transport. However, potential device applications necessitate precise control of the location and size of R and T phases and associated microstructures. Here, distinct R/T phase patterns of different spatial expanse are obtained by appropriately pre-poling the film by applying an electric field with an atomic force microscope tip during scanning, which also leads to initially uniform T phases as well as through local application of a certain sequence of voltage pulses. Moreover, the impact of field history on ferroelectric characteristics is investigated, providing further opportunities to tailor functional behavior.

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Mechanical stress-induced switching kinetics of ferroelectric thin films at the nanoscale

Cited by 24 publications

References 40 publications

Enhanced Ferroelectric Functionality in Flexible Lead Zirconate Titanate Films with In Situ Substrate‐Clamping Compensation

Enhanced Ferroelectric Functionality in Flexible Lead Zirconate Titanate Films with In Situ Substrate‐Clamping Compensation

Probing of Local Multifield Coupling Phenomena of Advanced Materials by Scanning Probe Microscopy Techniques

Electromechanical-mnemonic effects in BiFeO3 for electric field history-dependent crystallographic phase patterning

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