Superparamagnetic regular nanopillar-like structures studied by grazing-incidence X-ray scattering: Effect of vertical correlation

Amitesh Paul; Neelima Paul; Peter Müller-Buschbaum; Andreas Bauer; Peter Böni

doi:10.1107/S1600576714008188

Superparamagnetic regular nanopillar-like structures studied by grazing-incidence X-ray scattering: Effect of vertical correlation

Amitesh Paul^*, Neelima Paul, Peter Müller-Buschbaum, Andreas Bauer, Peter Böni

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Grazing-incidence small-angle X-ray scattering is reported from nanoclusters in superparamagnetic (SPM) polycrystalline Co separated by Au. The self-organization of the Co nanoclusters is in the form of nanopillar-like structures with high perpendicular magnetic anisotropy. A distinct signature of regular near-neighbour ordering is observed, which is commonly observed in patterned nanostructures. The estimated cluster sizes corroborate with those estimated from their magnetic field response. Most significantly, the SPM limit for these clusters can be raised to above room temperature (∼325 K) with an increase in the vertical correlation of the nanopillars. The slow response time of these uniform nanomagnetic grains (with respect to a 10 kHz AC field) suggests their possible usage as potential magnetic storage devices in the form of three-dimensional nanopillars.

Original language	English
Pages (from-to)	1065-1076
Number of pages	12
Journal	Journal of Applied Crystallography
Volume	47
Issue number	3
DOIs	https://doi.org/10.1107/S1600576714008188
State	Published - Jun 2014
Externally published	Yes

Keywords

GISAXS
cobalt nanoclusters
magnetic storage
superparamagnetism

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10.1107/S1600576714008188

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title = "Superparamagnetic regular nanopillar-like structures studied by grazing-incidence X-ray scattering: Effect of vertical correlation",

abstract = "Grazing-incidence small-angle X-ray scattering is reported from nanoclusters in superparamagnetic (SPM) polycrystalline Co separated by Au. The self-organization of the Co nanoclusters is in the form of nanopillar-like structures with high perpendicular magnetic anisotropy. A distinct signature of regular near-neighbour ordering is observed, which is commonly observed in patterned nanostructures. The estimated cluster sizes corroborate with those estimated from their magnetic field response. Most significantly, the SPM limit for these clusters can be raised to above room temperature (∼325 K) with an increase in the vertical correlation of the nanopillars. The slow response time of these uniform nanomagnetic grains (with respect to a 10 kHz AC field) suggests their possible usage as potential magnetic storage devices in the form of three-dimensional nanopillars.",

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author = "Amitesh Paul and Neelima Paul and Peter M{\"u}ller-Buschbaum and Andreas Bauer and Peter B{\"o}ni",

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T1 - Superparamagnetic regular nanopillar-like structures studied by grazing-incidence X-ray scattering

T2 - Effect of vertical correlation

AU - Paul, Amitesh

AU - Paul, Neelima

AU - Müller-Buschbaum, Peter

AU - Bauer, Andreas

AU - Böni, Peter

PY - 2014/6

Y1 - 2014/6

N2 - Grazing-incidence small-angle X-ray scattering is reported from nanoclusters in superparamagnetic (SPM) polycrystalline Co separated by Au. The self-organization of the Co nanoclusters is in the form of nanopillar-like structures with high perpendicular magnetic anisotropy. A distinct signature of regular near-neighbour ordering is observed, which is commonly observed in patterned nanostructures. The estimated cluster sizes corroborate with those estimated from their magnetic field response. Most significantly, the SPM limit for these clusters can be raised to above room temperature (∼325 K) with an increase in the vertical correlation of the nanopillars. The slow response time of these uniform nanomagnetic grains (with respect to a 10 kHz AC field) suggests their possible usage as potential magnetic storage devices in the form of three-dimensional nanopillars.

AB - Grazing-incidence small-angle X-ray scattering is reported from nanoclusters in superparamagnetic (SPM) polycrystalline Co separated by Au. The self-organization of the Co nanoclusters is in the form of nanopillar-like structures with high perpendicular magnetic anisotropy. A distinct signature of regular near-neighbour ordering is observed, which is commonly observed in patterned nanostructures. The estimated cluster sizes corroborate with those estimated from their magnetic field response. Most significantly, the SPM limit for these clusters can be raised to above room temperature (∼325 K) with an increase in the vertical correlation of the nanopillars. The slow response time of these uniform nanomagnetic grains (with respect to a 10 kHz AC field) suggests their possible usage as potential magnetic storage devices in the form of three-dimensional nanopillars.

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KW - magnetic storage

KW - superparamagnetism

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Superparamagnetic regular nanopillar-like structures studied by grazing-incidence X-ray scattering: Effect of vertical correlation

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Keywords

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