Ferroelectric Thin Films: Deposition, Advanced Film Characterization and Novel Device Concepts

Suchaneck, G.; Gerlach, Gerald

doi:10.1080/00150190600689712

Cited by 7 publications

(3 citation statements)

References 51 publications

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“…In order to accomplish scanning force microscopy and composition analysis simultaneously, special AFM cantilevers are needed which consist of a nanosized PZT emitter of high‐energy electrons. In this case, the PZT replaces the electronically inactive silicon nitride tip 3. Moreover, an additional coating of a ferromagnetic perovskite, which is usually well lattice‐matched to PZT, enables the emission of spin‐polarized electrons and therefore, the imaging of magnetic structures.…”

Section: Introductionsupporting

confidence: 85%

Cooperative Photochemical Reaction Mechanism of Femtosecond Laser‐Induced Photocoloration in Spirooxazine Microcrystals

2005

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Microcrystalline powders of spirooxazine and spiropyran compounds do not show photocoloration under steady‐state illumination, whereas they undergo photochromism on intense femtosecond laser‐pulse excitation. We investigated the characteristic mechanism of the crystalline photochromism by studying the photocoloration of spironaphthooxazine (SNO) and its chloro‐substituted derivative (Cl‐SNO) with our femtosecond diffuse‐reflectance spectroscopic system. In particular, femtosecond double‐pulse excitation using 390+780‐nm pulses and 390+390‐nm pulses, with a variable time interval between the two pulses, was applied to reveal an intermediate species involved in the photocoloration. Although 780‐nm excitation of an intermediate produced by 390‐nm excitation did not lead to isomerization, the 390+390‐nm excitation resulted in photocoloration. The yield for SNO decreased on increasing the interval from 40 ps to 5 ns, while that for Cl‐SNO was constant. The photocoloration mechanism in the crystalline phase is considered from the viewpoint of the time‐dependent density of short‐lived transient species, and it is concluded that cooperative interactions of excited states and nonplanar open forms play an important role in femtosecond laser‐induced photochromism in these crystals.

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Section: Introductionsupporting

confidence: 85%

Cooperative Photochemical Reaction Mechanism of Femtosecond Laser‐Induced Photocoloration in Spirooxazine Microcrystals

2005

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“…Recently, hydroacoustic applications of piezoceramics have been considerably extended. This concerns the technological transition from monolithic ceramics to composite systems, where a piezoceramics is a filler in a polymeric matrix [10][11][12]. The transition made it possible to increase the sensitivity of piezoelectric systems by dozens of times and to create effective tracking systems on objects moving in water media (e.g., for the monitoring of fish stocks) [2].…”

mentioning

confidence: 99%

“…Piezoceramics are widely used as semiconductor materials for special purposes [11][12][13]. As an example of such a system one can name the thermoresistor, which could change electrical resistivity by several orders of magnitude upon a temperature increase of 100 K. Thermoresistors have gained an extensive use in electronic devices, systems of fire control warning, remote measuring and temperature control [11,12]. Another type of special purpose semiconductor systems, varistors, are used as elements of devices for the protection of AC systems from a surge overvoltage, in voltage stabilizers and low frequency current regulators [13,14].…”

mentioning

confidence: 99%

Synthesis and dielectric properties of Pb_0.85Ba_0.25Zr_0.53Ti_0.47O₃ compounds with nano‐inclusions of Cu and Ni

Gurskii

Macutkevič

Banys

et al. 2013

Phys. Status Solidi C

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Ceramic piezomaterials based on Pb0.75Ba0.15Zr0.53Ti0.47O3 (PBZT) system are characterized by high values of the ferroelectric Curie temperature and polarization. They have widespread applications in electromechanical and electroacoustic transducers, bandwidth filters, transformers, frequency stabilized resonators, etc. Preparation of PBZT composites with nano‐inclusions of Cu and Ni have been carried out by a complex powder technology including metallization procedures which were performed by the well‐known chemical deposition method from standard solutions of copper and nickel. Studies of hydrostatic density and porosity of obtained samples as well as their microstructural investigations have yielded a larger density of PBZT‐metal composites (5.3 – 7.3 g/cm3) as compared with pure PBZT (4.7 g/cm3). Measurements of dielectric properties of samples in the frequency range from 20 Hz – 1 MHz have shown that the Curie temperature increases in PBZT (Ni) and decreases in PBZT(Cu) in comparison with pure PBZT. The complex dielectric permittivity of all investigated composites at higher temperatures and low frequencies is mainly caused by the high electrical conductivity. Only at the highest frequency used (1 MHz) the real part of the complex permittivity is caused by a resonant soft mode and could be fitted with the Curie‐Weiss law. The activation energy of ferroelectric domain mobility in PBZT (Cu, Ni) composites is lower than in pure PBZT. This can be explained by a decrease of the domain size in composites. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Enhancement of ferroelectricity in nanocones

Bykov

Suchaneck

Jastrabı́k

et al. 2009

Physica Status Solidi (b)

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In this work, for the very first time a calculation of the ferroelectric size effect of cone-shaped nanoparticles (nanocones) was performed. To solve the appropriate EulerLagrange equations, a direct variational method was used. An approximate analytical expression for the phase transition temperature dependence on the nanocone volume was derived. We have shown that the transition temperature might be higher by up to a factor of 2.5 compared to bulk materials.

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Ferroelectric Thin Films: Deposition, Advanced Film Characterization and Novel Device Concepts

Cited by 7 publications

References 51 publications

Cooperative Photochemical Reaction Mechanism of Femtosecond Laser‐Induced Photocoloration in Spirooxazine Microcrystals

Cooperative Photochemical Reaction Mechanism of Femtosecond Laser‐Induced Photocoloration in Spirooxazine Microcrystals

Synthesis and dielectric properties of Pb_0.85Ba_0.25Zr_0.53Ti_0.47O₃ compounds with nano‐inclusions of Cu and Ni

Enhancement of ferroelectricity in nanocones

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Ferroelectric Thin Films: Deposition, Advanced Film Characterization and Novel Device Concepts

Cited by 7 publications

References 51 publications

Cooperative Photochemical Reaction Mechanism of Femtosecond Laser‐Induced Photocoloration in Spirooxazine Microcrystals

Cooperative Photochemical Reaction Mechanism of Femtosecond Laser‐Induced Photocoloration in Spirooxazine Microcrystals

Synthesis and dielectric properties of Pb0.85Ba0.25Zr0.53Ti0.47O3 compounds with nano‐inclusions of Cu and Ni

Enhancement of ferroelectricity in nanocones

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Synthesis and dielectric properties of Pb_0.85Ba_0.25Zr_0.53Ti_0.47O₃ compounds with nano‐inclusions of Cu and Ni