Studies on structural, dielectric, impedance spectroscopy and magneto-dielectric properties of La0.7Ba0.3MnO3/P(VDF-TrFE) multiferroic (0–3) nanocomposite films

Koner, Sougata; Deshmukh, Pratik; Ahlawat, Anju; Karnal, A.K.; Satapathy, S.

doi:10.1016/j.jallcom.2021.159104

Cited by 23 publications

(5 citation statements)

References 33 publications

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“…Thus, an MD value as high as 20.84% at 10 kHz was obtained, indicating a possible dynamic coupling between magnetization and polarization [31,32]. As the magnetic field increased, the total deformation caused by the magnetostrictive effect further increased and transferred to the PZT layer through the interface, resulting in a lower dielectric constant [33]. Meanwhile, a broad peak is observed in the dielectric loss curves that move towards the low frequency as the magnetic field is increased, as shown in Figure 3b.…”

Section: Resultsmentioning

confidence: 95%

A Flexible Magnetic Field Sensor Based on PZT/CFO Bilayer via van der Waals Oxide Heteroepitaxy

Pan,

Ao,

Zhou

et al. 2023

Sensors

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Magnetoelectric (ME) magnetic field sensors utilize ME effects in ferroelectric ferromagnetic layered heterostructures to convert magnetic signals into electrical signals. However, the substrate clamping effect greatly limits the design and fabrication of ME composites with high ME coefficients. To reduce the clamping effect and improve the ME response, a flexible ME sensor based on PbZr0.2Ti0.8O3 (PZT)/CoFe2O4 (CFO) ME bilayered heterostructure was deposited on mica substrates via van der Waals oxide heteroepitaxy. A saturated magnetization of 114.5 emu/cm3 was observed in the bilayers. The flexible sensor exhibited a strong ME coefficient of 6.12 V/cm·Oe. The local ME coupling has been confirmed by the evolution of the ferroelectric domain under applied magnetic fields. The flexible ME sensor possessed a stable response with high sensitivity to both AC and DC weak magnetic fields. A high linearity of 0.9988 and sensitivity of 72.65 mV/Oe of the ME sensor were obtained under flat states. The ME output and limit-of-detection under different bending states showed an inferior trend as the bending radius increased. A flexible proximity sensor has been demonstrated, indicating a promising avenue for wearable device applications and significantly broadening the potential application of the flexible ME magnetic field sensors.

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Section: Resultsmentioning

confidence: 95%

A Flexible Magnetic Field Sensor Based on PZT/CFO Bilayer via van der Waals Oxide Heteroepitaxy

Pan,

Ao,

Zhou

et al. 2023

Sensors

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“…Figure 5 presents the trend of impedance, dielectric loss, and piezoelectric coefficient for the coupons. In the case of P(VDF-TrFE), the dielectric losses are mainly determined by the DC conduction of free charge at low frequency and molecular motion at high frequency [ 29 ]. The electrical impedance is directly related to the mechanical impedance of the host component to which the P(VDF-TrFE) is attached [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Environmental Robustness and Resilience of Direct-Write Ultrasonic Transducers Made from P(VDF-TrFE) Piezoelectric Coating

Wong

Lim

Subhodayam

et al. 2023

Sensors

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Conformability, lightweight, consistency and low cost due to batch fabrication in situ on host structures are the attractive advantages of ultrasonic transducers made of piezoelectric polymer coatings for structural health monitoring (SHM). However, knowledge about the environmental impacts of piezoelectric polymer ultrasonic transducers is lacking, limiting their widespread use for SHM in industries. The purpose of this work is to evaluate whether direct-write transducers (DWTs) fabricated from piezoelectric polymer coatings can withstand various natural environmental impacts. The ultrasonic signals of the DWTs and properties of the piezoelectric polymer coatings fabricated in situ on the test coupons were evaluated during and after exposure to various environmental conditions, including high and low temperatures, icing, rain, humidity, and the salt fog test. Our experimental results and analyses showed that it is promising for the DWTs made of piezoelectric P(VDF-TrFE) polymer coating with an appropriate protective layer to pass various operational conditions according to US standards.

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“…Koner et al fabricated nanocomposite films by adding La 0.7 Ba 0.3 MnO 3 (LBMO) nanoparticles at four different volume percentages to poly(vinylidenefluoride‐co‐trifluoroethylene) [P(VDF‐TrFE)] polymer matrix and investigated the dielectric properties as functions of temperature, frequency, and nanoparticle content 118 . The nanocomposite films displayed MWS interfacial polarization occurring at the polymer‐nanoparticle interface at low frequencies.…”

Section: Ds Of Polymer Nanocomposite Filmsmentioning

confidence: 99%

Dielectric characterization of fiber‐ and nanofiller‐reinforced polymeric materials

Quader,

Narayanan,

Caldona

2024

J of Applied Polymer Sci

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This review provides an in‐depth analysis of the electrical responses and relaxation behaviors of various polymeric materials including fiber‐reinforced polymer composites, polymer nanocomposites (PNC), and nanofiller‐reinforced polymeric films and coatings using dielectric spectroscopy (DS). The underlying theory of DS, corresponding instrumentation, various dielectric parameters, relevant equations, interpretations, and polarization mechanisms are thoroughly explored. The impact of synthetic and natural fibers and a diverse range of nanofillers on the dielectric responses and relaxation mechanisms of fiber‐reinforced composites, and PNC and films, respectively, are also examined. For each summarized article, we provide an overview of the composite or film preparation, followed by concise explanations of the dielectric behaviors under diverse conditions, including variations in temperature, frequency, moisture levels, fiber/filler ratios, and chemical treatment. In essence, this review contributes to a nuanced understanding of the intricate relationship between material structure, properties, and performance via DS data interpretation across a spectrum of scenarios.

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Studies on structural, dielectric, impedance spectroscopy and magneto-dielectric properties of La0.7Ba0.3MnO3/P(VDF-TrFE) multiferroic (0–3) nanocomposite films

Cited by 23 publications

References 33 publications

A Flexible Magnetic Field Sensor Based on PZT/CFO Bilayer via van der Waals Oxide Heteroepitaxy

A Flexible Magnetic Field Sensor Based on PZT/CFO Bilayer via van der Waals Oxide Heteroepitaxy

Environmental Robustness and Resilience of Direct-Write Ultrasonic Transducers Made from P(VDF-TrFE) Piezoelectric Coating

Dielectric characterization of fiber‐ and nanofiller‐reinforced polymeric materials

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