Magnetic Interaction Reversal in Watermelon Nanostructured Cr-Doped Fe Nanoclusters

Maninder Kaur; Qilin Dai; Mark Bowden; Mark Engelhard; Yaqiao Wu; Jinke Tang; You Qiang

doi:10.1063/1.4830434

Magnetic Interaction Reversal in Watermelon Nanostructured Cr-Doped Fe Nanoclusters

Maninder Kaur
, Qilin Dai
, Mark Bowden
, Mark Engelhard
, Yaqiao Wu
, Jinke Tang
, You Qiang

Division of Research and Economic Development

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

8 Scopus citations

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Abstract

Cr-doped core-shell Fe/Fe-oxide nanoclusters (NCs) were synthesized at varied atomic percentages of Cr from 0 at. % to 8 at. %. The low concentrations of Cr (<10 at. %) were selected in order to inhibit the complete conversion of the Fe-oxide shell to Cr₂O₃ and the Fe core to FeCr alloy. The magnetic interaction in Fe/Fe-oxide NCs (∼25 nm) can be controlled by antiferromagnetic Cr-dopant. We report the origin of σ-FeCr phase at very low Cr concentration (2 at. %) unlike in previous studies, and the interaction reversal from dipolar to exchange interaction in watermelon-like Cr-doped core-shell NCs.

Original language	American English
Article number	202407
Journal	Applied Physics Letters
Volume	103
Issue number	20
DOIs	https://doi.org/10.1063/1.4830434
State	Published - 11 Nov 2013

Keywords

antiferromagnetism
atomic force microscopy
crystal structure
demagnetization
doping
exchange interactions
nanoparticles
ozone
surface oxidation
x-ray diffraction

EGS Disciplines

Materials Science and Engineering

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Magnetic Interaction Reversal in Watermelon Nanostructured Cr-DopFinal published version, 787 KBLicense: Other

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title = "Magnetic Interaction Reversal in Watermelon Nanostructured Cr-Doped Fe Nanoclusters",

abstract = "Cr-doped core-shell Fe/Fe-oxide nanoclusters (NCs) were synthesized at varied atomic percentages of Cr from 0 at. \% to 8 at. \%. The low concentrations of Cr (<10 at. \%) were selected in order to inhibit the complete conversion of the Fe-oxide shell to Cr2O3 and the Fe core to FeCr alloy. The magnetic interaction in Fe/Fe-oxide NCs (∼25 nm) can be controlled by antiferromagnetic Cr-dopant. We report the origin of σ-FeCr phase at very low Cr concentration (2 at. \%) unlike in previous studies, and the interaction reversal from dipolar to exchange interaction in watermelon-like Cr-doped core-shell NCs.",

keywords = "antiferromagnetism, atomic force microscopy, crystal structure, demagnetization, doping, exchange interactions, nanoparticles, ozone, surface oxidation, x-ray diffraction",

author = "Maninder Kaur and Qilin Dai and Mark Bowden and Mark Engelhard and Yaqiao Wu and Jinke Tang and You Qiang",

year = "2013",

month = nov,

day = "11",

doi = "10.1063/1.4830434",

language = "American English",

volume = "103",

number = "20",

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TY - JOUR

T1 - Magnetic Interaction Reversal in Watermelon Nanostructured Cr-Doped Fe Nanoclusters

AU - Kaur, Maninder

AU - Dai, Qilin

AU - Bowden, Mark

AU - Engelhard, Mark

AU - Wu, Yaqiao

AU - Tang, Jinke

AU - Qiang, You

PY - 2013/11/11

Y1 - 2013/11/11

N2 - Cr-doped core-shell Fe/Fe-oxide nanoclusters (NCs) were synthesized at varied atomic percentages of Cr from 0 at. % to 8 at. %. The low concentrations of Cr (<10 at. %) were selected in order to inhibit the complete conversion of the Fe-oxide shell to Cr2O3 and the Fe core to FeCr alloy. The magnetic interaction in Fe/Fe-oxide NCs (∼25 nm) can be controlled by antiferromagnetic Cr-dopant. We report the origin of σ-FeCr phase at very low Cr concentration (2 at. %) unlike in previous studies, and the interaction reversal from dipolar to exchange interaction in watermelon-like Cr-doped core-shell NCs.

AB - Cr-doped core-shell Fe/Fe-oxide nanoclusters (NCs) were synthesized at varied atomic percentages of Cr from 0 at. % to 8 at. %. The low concentrations of Cr (<10 at. %) were selected in order to inhibit the complete conversion of the Fe-oxide shell to Cr2O3 and the Fe core to FeCr alloy. The magnetic interaction in Fe/Fe-oxide NCs (∼25 nm) can be controlled by antiferromagnetic Cr-dopant. We report the origin of σ-FeCr phase at very low Cr concentration (2 at. %) unlike in previous studies, and the interaction reversal from dipolar to exchange interaction in watermelon-like Cr-doped core-shell NCs.

KW - antiferromagnetism

KW - atomic force microscopy

KW - crystal structure

KW - demagnetization

KW - doping

KW - exchange interactions

KW - nanoparticles

KW - ozone

KW - surface oxidation

KW - x-ray diffraction

UR - https://www.scopus.com/pages/publications/84889661188

UR - https://scholarworks.boisestate.edu/mse_facpubs/177

U2 - 10.1063/1.4830434

DO - 10.1063/1.4830434

M3 - Article

SN - 0003-6951

VL - 103

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

M1 - 202407

ER -

Magnetic Interaction Reversal in Watermelon Nanostructured Cr-Doped Fe Nanoclusters

Abstract

Keywords

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