Microstructural evolution of charged defects in the fatigue process of polycrystalline BiFeO3 thin films

Qin, Ke; Kumar, Amit; Lou, Xiaojie; Feng, Yuan Ping; Zeng, Kaiyang; Cai, Yongqing; Wang, John

doi:10.1016/j.actamat.2014.08.058

Cited by 17 publications

(8 citation statements)

References 41 publications

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“…PFM is the primary tool to investigate the nanoscale ferroelectric domains and polarization dynamics for various piezoelectric and ferroelectric materials such as PZT, relaxor‐based piezoelectric materials (PZN‐PT or PMN‐PT), multiferroic BiFeO 3 (BFO) and organic ferroelectrics. We have applied PFM in many material systems, including doped/undoped BFO thin films, PZN‐PT single crystal, CH 3 NH 3 PbI 3 perovskite, MOF nanocrystals, poly(vinylidene fluoride) (PVDF) film, and ferroelectric‐like copper‐doped zinc oxide (ZnO:Cu) thin films . Taking the PZN‐PT single crystal as an example, the out‐of‐plan domain structure and the corresponding surface potential are illustrated in Figure i.…”

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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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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“…''tail to tail'' domain wall is negatively charged domain wall, and the ''head to head'' is positively charged domain wall. Charged domain walls show metallic behavior and are correlated with the polarity of the majority carriers [53]. Thus, the majority carriers including positively charged hole or V ÁÁ O assemble on ''tail to tail'' domain wall in p-type BiFeO 3 system [54,55] and result in the increase of leakage current of BFO thin films with ''tail to tail'' domain walls.…”

Section: Ohimic Conductionmentioning

confidence: 98%

The effects of grain size on electrical properties and domain structure of BiFeO3 thin films by sol–gel method

Lei

Cai

et al. 2015

J Mater Sci: Mater Electron

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BiFeO 3 (short for BFO) thin films with different grain sizes were fabricated via sol-gel spin-coating method. The effects of grain size on leakage behavior, dielectric, ferroelectric, piezoelectric properties and domain structure of BFO thin films have been investigated systematically. The X-ray diffraction results show that BFO thin films are rhombohedral distortion perovskite structure. Compared with the films annealed at 550°C, the grain size of BFO thin films annealed at 600°C is larger and the roughness is less, and the crystallinity and purity are higher. The leakage current density of BFO thin films with larger grain size is much lower than that of the films with smaller grain size. It is found that the conduction behavior of BFO thin films with smaller grain size transforms from Ohmic to space-charge-limited current and Fowler-Nordheim tunneling conduction as electric field increases. But there is the only transition from Ohmic conduction to space-charge-limited conduction for the thin films with larger grain size as electric field increase. The room temperature dielectric constant and remnant polarization of BFO thin films with larger grain size are higher than that of the films with smaller grain size. The ferroelectric domain size increases with the increase of grain size so that the ferroelectric polarization in BFO thin films with larger grain size enhances. Moreover, it is found that there are negatively charged ''tail to tail'' domain wall in BFO thin films with smaller grain size and positively charged ''head to head'' domain wall in the sample with larger grain size. The majority carriers including positively charged hole or oxygen vacancy assemble on negatively charged ''tail to tail'' domain wall in p-type BFO thin films with smaller grain size and result in relative higher leakage current. The piezoelectric coefficient of the films with larger grain size is much higher than that of the sample with smaller grain size.

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“…20 Ke, et al discussed the microstructural evolution of charged defects during the electrical cycling in Bi Fe O 3 thin films. 21 According to the mentioned references it is found that most of them focused on the metal films due to cyclic loads. Herein, we finished the low-cycle fatigue of polmeric thin films.…”

Section: Article Scitationorg/journal/advmentioning

confidence: 99%

Mechanical behavior of thin films due to in-plane tensile and fatigue loadings

Jen

Liou

2019

AIP Advances

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The mechanical properties, wrinkling phenomenon and fatigue response of polymeric polyethylene rectangular thin films due to both static tensile and cyclic tests were investigated. From the tensile tests we obtained the stress-strain curves and observed the formation of wrinkles for original films. The evolution of wrinkles resulted from in-plane to out-of-plane deformation and deflection. Also, the tensile tests for notched films were performed such as with a central hole, two vertical holes and two horizontal holes. From the fatigue tests the total strain vs. life curve was achieved. It was composed of two straight lines of both elastic and plastic parts.

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Microstructural evolution of charged defects in the fatigue process of polycrystalline BiFeO3 thin films

Cited by 17 publications

References 41 publications

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

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

The effects of grain size on electrical properties and domain structure of BiFeO3 thin films by sol–gel method

Mechanical behavior of thin films due to in-plane tensile and fatigue loadings

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