Piezoelectric and Magnetoelectric Thick Films for Fabricating Power Sources in Wireless Sensor Nodes

Priya, Shashank; Ryu, Jungho; Park, Chee Sung; Oliver, Josiah; Choi, Jong Jin; Park, Dong Soo

doi:10.3390/s90806362

Cited by 78 publications

(46 citation statements)

References 73 publications

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“…[1][2][3][4][5][6] Due to the likelihood that ME materials' domains can be switched and maintained at an atomic level with reduced energy cost, [7][8][9][10][11] faster, cheaper, and more sensitive devices could be built by upgrading current media with strong ME materials. Single-phase ME materials, however, are rare and suffer from significant drawbacks (i.e., weak ME coupling/low critical temperatures 12 ).…”

mentioning

confidence: 99%

Thickness dependence of La0.7Sr0.3MnO3/PbZr0.2Ti0.8O3 magnetoelectric interfaces

Zhou

Tra

Dong

et al. 2015

Applied Physics Letters

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Magnetoelectric materials have great potential to revolutionize electronic devices due to the coupling of their electric and magnetic properties. Thickness varying La 0.7 Sr 0.3 MnO 3 (LSMO)/ PbZr 0.2 Ti 0.8 O 3 (PZT) heterostructures were built and measured in this article by valence sensitive x-ray absorption spectroscopy. The sizing effects of the heterostructures on the LSMO/PZT magnetoelectric interfaces were investigated through the behavior of Mn valence, a property associated with the LSMO magnetization. We found that Mn valence increases with both LSMO and PZT thickness. Piezoresponse force microscopy revealed a transition from monodomain to polydomain structure along the PZT thickness gradient. The ferroelectric surface charge may change with domain structure and its effects on Mn valence were simulated using a two-orbital double-exchange model. The screening of ferroelectric surface charge increases the electron charges in the interface region, and greatly changes the interfacial Mn valence, which likely plays a leading role in the interfacial magnetoelectric coupling. The LSMO thickness dependence was examined through the combination of two detection modes with drastically different attenuation depths. The different length scales of these techniques' sensitivity to the atomic valence were used to estimate the depth dependence Mn valence. A smaller interfacial Mn valence than the bulk was found by globally fitting the experimental results. V C 2015 AIP Publishing LLC.

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mentioning

confidence: 99%

Thickness dependence of La0.7Sr0.3MnO3/PbZr0.2Ti0.8O3 magnetoelectric interfaces

Zhou

Tra

Dong

et al. 2015

Applied Physics Letters

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“…In most perovskite materials, except CCTO (Cu x Ca 1-x TiO 3 ), temperature plays a significant role in determining the structural behavior, phase transition, and morphological changes, which impute the internal grain boundary layer capacitance (IBLC). Furthermore, the dielectric properties of such materials may indeed be sensitive to physical effects such as temperature, electric field, and frequency for electrically activated bulk and grain boundary effects [36][37][38][39].However, perovskite materials require a detailed investigation on size and structural properties in various electrical and electromagnetic sensor domains, which are used especially in micro-electro-mechanical system applications [40,41].…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the electrical properties of nanocrystalline CaTi1−x Fe x O3−Δ perovskite

Mathu¹,

Nehru²,

Vinoth³

et al. 2015

J Mater Sci: Mater Electron

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Calcium titanate nanopowder doped with high content (1 M%) of iron was synthesized using simple sol-gel method. The four obtained samples were post-sintered at 100, 500, 900, and 1250°C to get soft agglomerates of nanocrystalline perovskites, which were deagglomerated by wet milling process using ethanol as a medium. The general stoichiometric formula for iron-doped CaTiO 3 was symbolized as CaTi 1-x Fe x O 3-d . The crystallographic structure of perovskites was found to be orthorhombic for all the four samples. The real and imaginary parts of the impedance values of sintered samples as a function of frequency were obtained using complex impedance spectroscopy. All the instrumental parameters were calibrated before initiating the measurements. The frequency range was set between 0.01 Hz and 1 MHz, and AC bias voltage was maintained at 50 mV. The objective of this work was to find the economical relevance of pioneering materials for electronic applications such as hydrogen production in fuel cells, solar plant, ferroelectric memory devices, microwave resonators, and sensible membranes as they are cheap and readily available, and can be prepared using controllable synthesis in a commercial laboratory.

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“…A slurry has previously been tape-cast to produce thick films of various materials [16][17][18][19]. Multi- * E-mail: sungth@hanyang.ac.kr layered tape-cast green sheets are often laminated to optimize thickness or manufacture bulk-like materials [20].…”

Section: Introductionmentioning

confidence: 99%

Optimization of a 0.69PZT-0.31PZNN thick film by controlling slurry viscosity and tape-casting blade height

Song

Woo

Ahn

et al. 2014

Journal of the Korean Physical Society

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We investigated how the viscosities of piezoelectric lead zirconate titanate/lead zirconate nickel niobate (PZT-PZNN) slurry samples affect the laminated-film densities based on various conditions of degassing time for 0, 30, and 60 min. PZT-PZNN slurries with different viscosities were tape casted into green sheets by adjusting the comma blade height to 100, 200, 300, 400, and 500 μm. As a result the slurry viscosity linearly increased with increasing slurry degassing time, and the thickness of the green sheet increased with increasing comma blade height. The density and the dielectric properties of piezoelectric ceramic films with the same thicknesses, but composed of different numbers of layers, were compared. The laminated-film density and the dielectric property d33 × g33 increased with decreasing number of laminated layers. However, when the viscosity of the slurry was too high (degassing time > 60 min) and the comma blade height was too high (comma blade height > 300 μm), the tape-casted green sheet was too thick to have enough time to dry. By controlling the slurry viscosity by adjusting the degassing time and the comma blade height, we were able to optimize the thickness of the green sheet in a tape-casting. The optimal green sheet thickness was < 70 μm, and the number of sheets laminated should be minimized to increase the film's density and dielectric constant.

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Piezoelectric and Magnetoelectric Thick Films for Fabricating Power Sources in Wireless Sensor Nodes

Cited by 78 publications

References 73 publications

Thickness dependence of La0.7Sr0.3MnO3/PbZr0.2Ti0.8O3 magnetoelectric interfaces

Thickness dependence of La0.7Sr0.3MnO3/PbZr0.2Ti0.8O3 magnetoelectric interfaces

Effect of temperature on the electrical properties of nanocrystalline CaTi1−x Fe x O3−Δ perovskite

Optimization of a 0.69PZT-0.31PZNN thick film by controlling slurry viscosity and tape-casting blade height

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