Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets

Young Gil Park; Jun Mo Yang; Daisuke Shindo

doi:10.1093/jmicro/53.3.267

Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets

Young Gil Park, Jun Mo Yang, Daisuke Shindo

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3 Citations (Scopus)

Abstract

Microstructures and magnetic domain structures of precipitation-hardened Sm-Co permanent magnets were systematically investigated by analytical electron microscopy and electron holography. By an elemental mapping method with energy-dispersive X-ray spectroscopy the change in the local distribution of additive elements, i.e. Cu, Fe and Zr, in Sm-Co magnets with various heat treatments was visualized and the enrichment of Zr in the Z-phase with a width of ∼1 nm was clarified directly. Detailed analysis with electron holography revealed that considerable fluctuation in the distribution of lines of magnetic flux in the step-aged magnet was due to the chemical partitioning of additives and resulted in magnetic hardening during the magnetization process.

Original language	English
Pages (from-to)	267-270
Number of pages	4
Journal	Journal of Electron Microscopy
Volume	53
Issue number	3
DOIs	https://doi.org/10.1093/jmicro/53.3.267
Publication status	Published - 2004

Keywords

EDS elemental mapping
Electron holography
Lines of magnetic flux
Lorentz microscopy
Sm-Co magnet

ASJC Scopus subject areas

Instrumentation

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10.1093/jmicro/53.3.267

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@article{42fb6637de2142e2a21fc2e8f55567eb,

title = "Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets",

abstract = "Microstructures and magnetic domain structures of precipitation-hardened Sm-Co permanent magnets were systematically investigated by analytical electron microscopy and electron holography. By an elemental mapping method with energy-dispersive X-ray spectroscopy the change in the local distribution of additive elements, i.e. Cu, Fe and Zr, in Sm-Co magnets with various heat treatments was visualized and the enrichment of Zr in the Z-phase with a width of ∼1 nm was clarified directly. Detailed analysis with electron holography revealed that considerable fluctuation in the distribution of lines of magnetic flux in the step-aged magnet was due to the chemical partitioning of additives and resulted in magnetic hardening during the magnetization process.",

keywords = "EDS elemental mapping, Electron holography, Lines of magnetic flux, Lorentz microscopy, Sm-Co magnet",

author = "Park, {Young Gil} and Yang, {Jun Mo} and Daisuke Shindo",

note = "Funding Information: The authors gratefully acknowledge Dr H. Hiroyoshi and Mr F. Okabe for fruitful discussions and experimental help. They also thank Drs T. Oikawa and M. Kawasaki, JEOL Ltd, for their help in EDS elemental mapping. This work was partly supported by Special Coordination Funds for Promoting Science and Technology on {\textquoteleft}Nanohetero Metallic Materials{\textquoteright} from the Science and Technology Agency of Japan.",

year = "2004",

doi = "10.1093/jmicro/53.3.267",

language = "English",

volume = "53",

pages = "267--270",

journal = "Microscopy (Oxford, England)",

issn = "2050-5698",

publisher = "Japanese Society of Microscopy",

number = "3",

}

TY - JOUR

T1 - Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets

AU - Park, Young Gil

AU - Yang, Jun Mo

AU - Shindo, Daisuke

N1 - Funding Information: The authors gratefully acknowledge Dr H. Hiroyoshi and Mr F. Okabe for fruitful discussions and experimental help. They also thank Drs T. Oikawa and M. Kawasaki, JEOL Ltd, for their help in EDS elemental mapping. This work was partly supported by Special Coordination Funds for Promoting Science and Technology on ‘Nanohetero Metallic Materials’ from the Science and Technology Agency of Japan.

PY - 2004

Y1 - 2004

N2 - Microstructures and magnetic domain structures of precipitation-hardened Sm-Co permanent magnets were systematically investigated by analytical electron microscopy and electron holography. By an elemental mapping method with energy-dispersive X-ray spectroscopy the change in the local distribution of additive elements, i.e. Cu, Fe and Zr, in Sm-Co magnets with various heat treatments was visualized and the enrichment of Zr in the Z-phase with a width of ∼1 nm was clarified directly. Detailed analysis with electron holography revealed that considerable fluctuation in the distribution of lines of magnetic flux in the step-aged magnet was due to the chemical partitioning of additives and resulted in magnetic hardening during the magnetization process.

AB - Microstructures and magnetic domain structures of precipitation-hardened Sm-Co permanent magnets were systematically investigated by analytical electron microscopy and electron holography. By an elemental mapping method with energy-dispersive X-ray spectroscopy the change in the local distribution of additive elements, i.e. Cu, Fe and Zr, in Sm-Co magnets with various heat treatments was visualized and the enrichment of Zr in the Z-phase with a width of ∼1 nm was clarified directly. Detailed analysis with electron holography revealed that considerable fluctuation in the distribution of lines of magnetic flux in the step-aged magnet was due to the chemical partitioning of additives and resulted in magnetic hardening during the magnetization process.

KW - EDS elemental mapping

KW - Electron holography

KW - Lines of magnetic flux

KW - Lorentz microscopy

KW - Sm-Co magnet

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U2 - 10.1093/jmicro/53.3.267

DO - 10.1093/jmicro/53.3.267

M3 - Article

C2 - 15332653

AN - SCOPUS:3242876874

VL - 53

SP - 267

EP - 270

JO - Microscopy (Oxford, England)

JF - Microscopy (Oxford, England)

SN - 2050-5698

IS - 3

ER -

Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets

Abstract

Keywords

ASJC Scopus subject areas

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