Colossal magnetocapacitance effect at room temperature

Bishchaniuk, T. M.; Grygorchak, I. I.

doi:10.1063/1.4878403

Cited by 8 publications

(7 citation statements)

References 30 publications

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“…Variation of the cavitate content β-СD〈FeSO 4 〉 does not cause significant changes in ε(ω) along the normal to nanolayers in the frequency range 10 2 …10 6 Hz. An exception is the guest loading degree Q = 3 mass.%, when significant reduction of ε at frequencies up to 10 4 Hz is observable.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, we [6] have synthesized the supramolecular ensemble of a fundamentally new architecture as subhost〈host〈guest〉〉, where the organic/inorganic cavitate β-cyclodextrin (β-CD), and ferrous sulphate serve as a guest content in the inorganic MCM-41 SiO 2 -submatrix, forming the guest hierarchy in this way. The colossal magneto capacitance effect and the huge (almost tenfold) alternative-current (in the 10 3…”

Section: Introductionmentioning

confidence: 99%

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The influence of the guest cavitations loading degree in fractal nanohybrids GaSe<β-cyclodextrin<FeSO4>> on the current passing and polarization processes. The giant “battery spin” effect at room temperature.

Ivashchyshyn¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. The investigation results of clathrate properties GaSe〈β-cyclodextrin〈FeSO 4 〉〉 of the hierarchical architecture with the fourfold expansion at different degrees of a guest cavitations loading have been presented. Based on the frequency dependence of the specific complex impedance, the changes of the impurity energy spectrum expanded matrix parameters as a result of forming the supramolecular ensembles on its basis are clarified. For some architecture, impedance, photo and magneto responses showed the extraordinary behavior of the magnetoimpedance and photoconductivity and also the giant negative photodielectric and the colossal magnetocapacitance effects at room temperature, which open new possibilities of their practical application.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of the guest cavitations loading degree in fractal nanohybrids GaSe<β-cyclodextrin<FeSO4>> on the current passing and polarization processes. The giant “battery spin” effect at room temperature.

Ivashchyshyn¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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“…In addition, monocrystals have high photosensitivity in the visible spectrum. Since neither β-CD nor ferrous sulfate can be directly introduced into GaSe, for the formation of supramolecular ensembles we used the three-stage intercalation-deintercalation technology, 8,9 which resulted in a 4-fold expansion of the initial matrix for each kind of guest content, the content of which was controlled by gravimetric and chemical analysis. The process is schematically shown in Figure 1.…”

Section: ■ Experimental Methodologymentioning

confidence: 99%

Generalized Electrodiffusion Equation with Fractality of Space–Time: Experiment and Theory

et al. 2018

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Physical and technological principles of formation of clathrate structures for supramolecular electronics are given in this paper. It has been established that supramolecular nature of the "host-guest" conjunction, in general, and hierarchical architecture of the corresponding clathrates, in particular, provide realization of such an extraordinary effect as an optically or a magnetically controlled phenomenon of colossal "negative capacity" with a predicted frequency interval of manifestation, magnitude, and multiplicity. For the first time, the experimental confirmation of the behavior of the electretized fractal clathrate GaSe⟨β-CD⟨FeSO⟩⟩ as a dissipative element, which accumulates inductive energy, is demonstrated. A general approach for obtaining the generalized transport equations with fractional derivatives by using the Liouville equation with fractional derivatives for a system of classical particles and the Zubarev nonequilibrium statistical operator method within Renyi statistics is presented. New non-Markovian electrodiffusion equations for ions in a spatially heterogeneous medium with the fractal structure and a generalized Cattaneo-type diffusion equation taking into account the fractality of space-time are obtained. The model of subdiffusion impedance based on the Cattaneo equation with fractional derivatives is applied to multilayer nanostructures. Nyquist diagrams for different valuses of the parameter τ (delay time of a flow relative to a concentration gradient) and the subdiffusion coefficient D are calculated.

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“…It was proved that the synthesized clathrate/cavitand ensembles of the former type are promising for the development of supramolecular photoelectronics, and those of the latter type to enhance the efficiency of the Li + -interca-lation current generation. Recently [9], we have synthesized a supramolecular ensemble with essentially new architecture subhost ⟨host ⟨guest⟩⟩, in which the organic/inorganic cavitate of -cyclodextrin ( -CD) and iron sulfate served as a guest content in the inorganic SiO 2 submatrix MCM-41, thus forming a guest hierarchy. It is in this ensemble where the colossal magnetocapacitance effect and the giant (almost tenfold) alternating-current (in a frequency interval of 10 3 -10 6 Hz) negative magnetoresistive effect taking place under room temperatures and weak magnetic fields were revealed for the first time.…”

Section: Introductionmentioning

confidence: 99%

Modification of the Properties of Clathrate/Cavitate Complexes with Hierarchical Architecture at Their Synthesis in Crossed Electric and Light-Wave Fields

Grygorchak¹,

Hryhorchak²,

Ivashchyshyn³

2017

Ukr. J. Phys.

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A new technological approach is proposed for the synthesis of multilayered nanostructures, which provides them unique properties and extraordinary prospects of practical applications. In particular, the synthesis of the InSe⟨-⟨FeSO4⟩⟩ nanostructure with hierarchical architecture in crossed electric and light-wave fields is shown to result in the abnormally strong positive magnetoresistance effect with giant magnetoresistance oscillations in a low-frequency interval of 10 −3-10 Hz. The efficiency of applying the synthesized nanohybrid as an active element in gyrator-free delay nanolines controlled by the magnetic field and in magnetic-field sensors that are supersensitive at room temperatures is substantiated.

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Colossal magnetocapacitance effect at room temperature

Cited by 8 publications

References 30 publications

The influence of the guest cavitations loading degree in fractal nanohybrids GaSe<β-cyclodextrin<FeSO4>> on the current passing and polarization processes. The giant “battery spin” effect at room temperature.

The influence of the guest cavitations loading degree in fractal nanohybrids GaSe<β-cyclodextrin<FeSO4>> on the current passing and polarization processes. The giant “battery spin” effect at room temperature.

Generalized Electrodiffusion Equation with Fractality of Space–Time: Experiment and Theory

Modification of the Properties of Clathrate/Cavitate Complexes with Hierarchical Architecture at Their Synthesis in Crossed Electric and Light-Wave Fields

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