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2013 | OriginalPaper | Buchkapitel

4. True Nanoferroics with the Properties Absent in Corresponding Bulk Samples

verfasst von : M. D. Glinchuk, A. V. Ragulya, Vladimir A. Stephanovich

Erschienen in: Nanoferroics

Verlag: Springer Netherlands

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Abstract

The Chapter covers the theoretical and experimental approaches to the investigations of the physical properties, which are inherent in ferroics of nanosize and absent in corresponding bulk materials. Namely, the strong surface influence along with other effects of geometrical confinement generates number of physical effects, which do not occur in bulk ferroics samples. One example of such phenomena is room-temperature ferromagnetism in nanoparticles and thin films of undoped CeO₂, HfO₂, SnO₂, Al₂O₃ and other nonmagnetic (in bulk samples) oxides. Theo other striking example is appearance of so-called spontaneous flexoeffects (i.e. flexoelectric, flexomagnetic, flexoelastic) in ferroic nanosamples due to strong gradient terms generated by the effects of geometrical confinement. We predict strong altering of phase transition temperature, magnetic and/or dielectric susceptibilities, piezomoduli and other physical properties of nanoferroics by the above spontaneous flexoeffects. Latter permits to describe many previously unclear experimental results.

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Vorheriges Kapitel Theoretical Description of Primary Nanoferroics. Comparison of the Theory with Experiment

Nächstes Kapitel Synthesis of Nanoferroics

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Titel: True Nanoferroics with the Properties Absent in Corresponding Bulk Samples
verfasst von: M. D. Glinchuk
A. V. Ragulya
Vladimir A. Stephanovich
Verlag: Springer Netherlands
Buch: Nanoferroics
Print ISBN: 978-94-007-5991-6

Electronic ISBN: 978-94-007-5992-3

Copyright-Jahr: 2013
DOI: https://doi.org/10.1007/978-94-007-5992-3_4

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