Eine neue seignette-elektrische Substanz

Busch, G.; Scherrer, P.

doi:10.1007/bf01498152

Cited by 224 publications

(108 citation statements)

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“…1,2) The spontaneous polarization and the dielectric constant of KDA are similar to those of KDP. In KDA, the ferroelectric transition takes place at 92 K, the lowest among the KDP-type pure crystals under atmospheric pressure.…”

Section: Introductionmentioning

confidence: 73%

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Hydrogen Atom of KH₂AsO₄ Determined by Neutron Diffraction Study

2011

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The crystal structure of KH 2 AsO 4 (KDA) is refined at room temperature by neutron single-crystal structural analysis. The distance R OO between two oxygen atoms bonded by a hydrogen atom is slightly longer than that in KH 2 PO 4 (KDP). A double-peak distribution of H with the splitting distance d is visualized directly in the nuclear density map obtained by the maximum entropy method. The parameter d of KDA is also larger than that of KDP, though the transition temperature of KDA is lower than that of KDP.

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Section: Introductionmentioning

confidence: 73%

“…This difference in d crucially affects the proton tunneling frequency. For larger d, 1 T is smaller, so that the transition temperature may increase.…”

Section: 11)mentioning

confidence: 99%

Hydrogen Atom of KH₂AsO₄ Determined by Neutron Diffraction Study

2011

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“…KDP (potassium dihydrogen phosphate) was the next ferroelectric to be found, in 1935 [2]. However, it was not until the discovery of ferroelectricity in barium titanate (BaTiO 3 ), during the second world war, that the field really took off, both in terms of fundamental scientific research, and in terms of technological applications.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectrics at the nanoscale

Gregg¹

2009

Physica Status Solidi (a)

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There are several factors which make the investigation and understanding of nanoscale ferroelectrics particularly timely and important. Firstly, there is a market pressure, primarily from the electronics industry, to integrate ferroelectrics into devices with progressive decreases in size and increases in morphological complexity. This is perhaps best illustrated through the roadmaps for product development in FeRAM (Ferroelectric Random Access Memory) where the need for increases in bit density will require a move from 2D planar capacitor structures to 3D trenched capacitors in the next few years. Secondly, there is opportunity for novel exploration, as it is only relatively recently that developments in thin film growth of complex oxides, self‐assembly techniques and high‐resolution ‘top–down’ patterning have converged to allow the fabrication of isolated and well‐defined ferroelectric nanoshapes, the properties of which are not known. Thirdly, there is an expectation that the behaviour of small scale ferroelectrics will be different from bulk, as this group of functional materials is highly sensitive to boundary/surface conditions, which are expected to dominate the overall response when sizes are reduced into the nanoscale regime.This feature article attempts to introduce some of the current areas of discovery and debate surrounding studies on ferroelectrics at the nanoscale. The focus is directed primarily at the search for novel size‐related properties and behaviour which are not necessarily observed in bulk. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Potassium dihydrogen phosphate KDP is one of the earliest crystals identified as a ferroelectric [1]. It has been extensively studied experimentally and theoretically.…”

Section: Introductionmentioning

confidence: 99%

The role of the ice rules in the thermal properties of potassium dihydrogen phosphate

Matsuo

Yamamuro

Oguni

et al. 1996

Journal of Thermal Analysis

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Calorimetric properties of potassium dihydrogen phosphate are examined by analysis of the heat capacity data taken from the literature and from a recent measurement. The analysis is based on an extensive use of harmonic heat capacity functions to separate the effect of the phase transition from the vibrational contribution. The transition enthalpy and entropy derived are 421 J mo1-1 and 3.79 J K -l mol -I, respectively. Characteristic temperatures of the lattice vibrations including the Debye temperature (254+18) K were determined. The transition entropy, exceeding the value compatible with the ice-rules, is consistent with the temperature dependence of the heat capacity. The implication of the result is discussed by comparison with the hydrogen bond networks in copper formate tetrahydrate and thallium dihydrogen phosphate.

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Eine neue seignette-elektrische Substanz

Cited by 224 publications

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Hydrogen Atom of KH₂AsO₄ Determined by Neutron Diffraction Study

Hydrogen Atom of KH₂AsO₄ Determined by Neutron Diffraction Study

Ferroelectrics at the nanoscale

The role of the ice rules in the thermal properties of potassium dihydrogen phosphate

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Eine neue seignette-elektrische Substanz

Cited by 224 publications

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Hydrogen Atom of KH2AsO4 Determined by Neutron Diffraction Study

Hydrogen Atom of KH2AsO4 Determined by Neutron Diffraction Study

Ferroelectrics at the nanoscale

The role of the ice rules in the thermal properties of potassium dihydrogen phosphate

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Product

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About

Hydrogen Atom of KH₂AsO₄ Determined by Neutron Diffraction Study

Hydrogen Atom of KH₂AsO₄ Determined by Neutron Diffraction Study