Metastable vortex-like polarization textures in ferroelectric nanoparticles of different shapes and sizes.
| Title: | Metastable vortex-like polarization textures in ferroelectric nanoparticles of different shapes and sizes. |
|---|---|
| Authors: | Pitike, Krishna Chaitanya1, Mangeri, John2,3, Whitelock, Hope3, Patel, Tulsi1, Dyer, Pamela1, Alpay, S. Pamir1,3, Nakhmanson, Serge1,3 serge.nakhmanson@uconn.edu |
| Source: | Journal of Applied Physics. 2018, Vol. 124 Issue 6, pN.PAG-N.PAG. 10p. 1 Diagram, 2 Charts, 4 Graphs. |
| Subject Terms: | *FERROELECTRICITY, *NANOPARTICLES, *FINITE element method, *PARTICLE size distribution, *GEOMETRY |
| Abstract: | The dependence of the polarization texture topology in ferroelectric PbTiO3 nanoparticles, embedded in a dielectric matrix, on the particle shape and size was investigated with a time-dependent Landau-Ginzburg-Devonshire approach combined with coupled-physics finite-element-method based simulations. Particle shapes belonging to the superellipsoidal family were probed, including octahedral, cubic, and intermediate geometries. For each shape, a parametric sweep of particle sizes ranging from 2 to 40 nm was conducted, revealing a general trend for the texture transformations from a monodomain, through a vortex-like, to a multidomain state, as the size increases. Critical particle sizes for the texture instabilities were found to be strongly dependent on the particle shape, with octahedral particles undergoing transitions at much larger volumes, compared to the cubic particles. Furthermore, for each of the considered non-spherical shapes of appropriate size, it was possible to obtain multiple vortex-like textures whose paraelectric cores are aligned with every rotational axis of the particle point symmetry group. The shape-dependent metastability of the vortex-like textures opens up new avenues for controlling polarization at the nanoscale in a variety of technological applications. [ABSTRACT FROM AUTHOR] |
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| Items | – Name: Title Label: Title Group: Ti Data: Metastable vortex-like polarization textures in ferroelectric nanoparticles of different shapes and sizes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pitike%2C+Krishna+Chaitanya%22">Pitike, Krishna Chaitanya</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mangeri%2C+John%22">Mangeri, John</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Whitelock%2C+Hope%22">Whitelock, Hope</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Patel%2C+Tulsi%22">Patel, Tulsi</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dyer%2C+Pamela%22">Dyer, Pamela</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Alpay%2C+S%2E+Pamir%22">Alpay, S. Pamir</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Nakhmanson%2C+Serge%22">Nakhmanson, Serge</searchLink><relatesTo>1,3</relatesTo><i> serge.nakhmanson@uconn.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Applied+Physics%22">Journal of Applied Physics</searchLink>. 2018, Vol. 124 Issue 6, pN.PAG-N.PAG. 10p. 1 Diagram, 2 Charts, 4 Graphs. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22FERROELECTRICITY%22">FERROELECTRICITY</searchLink><br />*<searchLink fieldCode="DE" term="%22NANOPARTICLES%22">NANOPARTICLES</searchLink><br />*<searchLink fieldCode="DE" term="%22FINITE+element+method%22">FINITE element method</searchLink><br />*<searchLink fieldCode="DE" term="%22PARTICLE+size+distribution%22">PARTICLE size distribution</searchLink><br />*<searchLink fieldCode="DE" term="%22GEOMETRY%22">GEOMETRY</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The dependence of the polarization texture topology in ferroelectric PbTiO3 nanoparticles, embedded in a dielectric matrix, on the particle shape and size was investigated with a time-dependent Landau-Ginzburg-Devonshire approach combined with coupled-physics finite-element-method based simulations. Particle shapes belonging to the superellipsoidal family were probed, including octahedral, cubic, and intermediate geometries. For each shape, a parametric sweep of particle sizes ranging from 2 to 40 nm was conducted, revealing a general trend for the texture transformations from a monodomain, through a vortex-like, to a multidomain state, as the size increases. Critical particle sizes for the texture instabilities were found to be strongly dependent on the particle shape, with octahedral particles undergoing transitions at much larger volumes, compared to the cubic particles. Furthermore, for each of the considered non-spherical shapes of appropriate size, it was possible to obtain multiple vortex-like textures whose paraelectric cores are aligned with every rotational axis of the particle point symmetry group. The shape-dependent metastability of the vortex-like textures opens up new avenues for controlling polarization at the nanoscale in a variety of technological applications. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Applied Physics is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1063/1.5037163 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: N.PAG Subjects: – SubjectFull: FERROELECTRICITY Type: general – SubjectFull: NANOPARTICLES Type: general – SubjectFull: FINITE element method Type: general – SubjectFull: PARTICLE size distribution Type: general – SubjectFull: GEOMETRY Type: general Titles: – TitleFull: Metastable vortex-like polarization textures in ferroelectric nanoparticles of different shapes and sizes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pitike, Krishna Chaitanya – PersonEntity: Name: NameFull: Mangeri, John – PersonEntity: Name: NameFull: Whitelock, Hope – PersonEntity: Name: NameFull: Patel, Tulsi – PersonEntity: Name: NameFull: Dyer, Pamela – PersonEntity: Name: NameFull: Alpay, S. Pamir – PersonEntity: Name: NameFull: Nakhmanson, Serge IsPartOfRelationships: – BibEntity: Dates: – D: 14 M: 08 Text: 2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 00218979 Numbering: – Type: volume Value: 124 – Type: issue Value: 6 Titles: – TitleFull: Journal of Applied Physics Type: main |
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