Mapping magnetic fields of Fe3O4 nanosphere assemblies by electron holography

Kai He; Fei Xiang Ma; Cheng Yan Xu; John Cumings

doi:10.1063/1.4798500

Mapping magnetic fields of Fe₃O₄ nanosphere assemblies by electron holography

Kai He, Fei Xiang Ma, Cheng Yan Xu, John Cumings

NUANCE - Atomic and Nanoscale Characterization Experimental Center

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

16 Scopus citations

Abstract

Crystalline Fe₃O₄ nanospheres with averaged diameters of 150 nm have been synthesized by a facile solvothermal method and characterized using transmission electron microscopy and electron holography. The nanospheres can self-assemble into either chain-like or ring-like shapes with sizes of a few micrometers, where large magnetic moments are found for individual particles at the remanent state and lead to strong fringing field in vicinity of the assemblies. Magnetic dipolar moments can be aligned both within and out of the sample plane, with a typical length scale on the order of 500 nm.

Original language	English (US)
Article number	17B528
Journal	Journal of Applied Physics
Volume	113
Issue number	17
DOIs	https://doi.org/10.1063/1.4798500
State	Published - May 7 2013

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.4798500

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title = "Mapping magnetic fields of Fe3O4 nanosphere assemblies by electron holography",

abstract = "Crystalline Fe3O4 nanospheres with averaged diameters of 150 nm have been synthesized by a facile solvothermal method and characterized using transmission electron microscopy and electron holography. The nanospheres can self-assemble into either chain-like or ring-like shapes with sizes of a few micrometers, where large magnetic moments are found for individual particles at the remanent state and lead to strong fringing field in vicinity of the assemblies. Magnetic dipolar moments can be aligned both within and out of the sample plane, with a typical length scale on the order of 500 nm.",

author = "Kai He and Ma, {Fei Xiang} and Xu, {Cheng Yan} and John Cumings",

note = "Funding Information: This work was supported as part of the Science of Nanostructures for Electrical Energy Storage, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DESC0001160. We also acknowledge the Maryland NanoCenter and its NispLab supported by the NSF MRSEC. C. Y. Xu thanks the Fundamental Research Funds for the Central Universities (No. HIT.BRETIII.201203).",

year = "2013",

month = may,

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doi = "10.1063/1.4798500",

language = "English (US)",

volume = "113",

journal = "Journal of Applied Physics",

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T1 - Mapping magnetic fields of Fe3O4 nanosphere assemblies by electron holography

AU - He, Kai

AU - Ma, Fei Xiang

AU - Xu, Cheng Yan

AU - Cumings, John

N1 - Funding Information: This work was supported as part of the Science of Nanostructures for Electrical Energy Storage, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DESC0001160. We also acknowledge the Maryland NanoCenter and its NispLab supported by the NSF MRSEC. C. Y. Xu thanks the Fundamental Research Funds for the Central Universities (No. HIT.BRETIII.201203).

PY - 2013/5/7

Y1 - 2013/5/7

N2 - Crystalline Fe3O4 nanospheres with averaged diameters of 150 nm have been synthesized by a facile solvothermal method and characterized using transmission electron microscopy and electron holography. The nanospheres can self-assemble into either chain-like or ring-like shapes with sizes of a few micrometers, where large magnetic moments are found for individual particles at the remanent state and lead to strong fringing field in vicinity of the assemblies. Magnetic dipolar moments can be aligned both within and out of the sample plane, with a typical length scale on the order of 500 nm.

AB - Crystalline Fe3O4 nanospheres with averaged diameters of 150 nm have been synthesized by a facile solvothermal method and characterized using transmission electron microscopy and electron holography. The nanospheres can self-assemble into either chain-like or ring-like shapes with sizes of a few micrometers, where large magnetic moments are found for individual particles at the remanent state and lead to strong fringing field in vicinity of the assemblies. Magnetic dipolar moments can be aligned both within and out of the sample plane, with a typical length scale on the order of 500 nm.

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ER -

Mapping magnetic fields of Fe₃O₄ nanosphere assemblies by electron holography

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