Magnetic domain structure and magnetic hardening in Sm-Fe-Mn-N coarse powder

J. J. Kim; H. S. Park; D. Shindo; T. Iseki; N. Oshimura; T. Ishikawa; K. Ohmori

doi:10.2320/matertrans.MD200702

Magnetic domain structure and magnetic hardening in Sm-Fe-Mn-N coarse powder

J. J. Kim, H. S. Park, D. Shindo, T. Iseki, N. Oshimura, T. Ishikawa, K. Ohmori

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

5 Citations (Scopus)

Abstract

The magnetic domain structure and magnetization process in Sm ₂(Fe_0.95,Mn_0.05)₁₇N_5.0 powders are investigated by Lorentz microscopy and electron holography, The magnetic domain walls are aligned along the magnetization easy axis (c axis) and are connected with one another along amorphous layers that are distributed along the direction parallel to the c axis. On the other hand, it is found that the domain walls are always located in the amorphous layer after domain wall motion. These results reveal that the amorphous layers are the pinning centers of the domain walls. Thus, it is reasonable to consider that the coercivity of a Sm₂(Fe_0.95,Mn_0.05)₁₇N_5.0 powder is strongly affected by the distribution of the amorphous layers in the powder.

Original language	English
Pages (from-to)	2606-2611
Number of pages	6
Journal	Materials Transactions
Volume	48
Issue number	10
DOIs	https://doi.org/10.2320/matertrans.MD200702
Publication status	Published - 2007 Oct

Keywords

Coercivity mechanism
Electron holography
Lorentz microscopy
Samarium-iron-manganese-nitrogen coarse powder

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.2320/matertrans.MD200702

Cite this

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title = "Magnetic domain structure and magnetic hardening in Sm-Fe-Mn-N coarse powder",

abstract = "The magnetic domain structure and magnetization process in Sm 2(Fe0.95,Mn0.05)17N5.0 powders are investigated by Lorentz microscopy and electron holography, The magnetic domain walls are aligned along the magnetization easy axis (c axis) and are connected with one another along amorphous layers that are distributed along the direction parallel to the c axis. On the other hand, it is found that the domain walls are always located in the amorphous layer after domain wall motion. These results reveal that the amorphous layers are the pinning centers of the domain walls. Thus, it is reasonable to consider that the coercivity of a Sm2(Fe0.95,Mn0.05)17N5.0 powder is strongly affected by the distribution of the amorphous layers in the powder.",

keywords = "Coercivity mechanism, Electron holography, Lorentz microscopy, Samarium-iron-manganese-nitrogen coarse powder",

author = "Kim, {J. J.} and Park, {H. S.} and D. Shindo and T. Iseki and N. Oshimura and T. Ishikawa and K. Ohmori",

year = "2007",

month = oct,

doi = "10.2320/matertrans.MD200702",

language = "English",

volume = "48",

pages = "2606--2611",

journal = "Materials Transactions",

issn = "1345-9678",

publisher = "Japan Institute of Metals (JIM)",

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T1 - Magnetic domain structure and magnetic hardening in Sm-Fe-Mn-N coarse powder

AU - Kim, J. J.

AU - Park, H. S.

AU - Shindo, D.

AU - Iseki, T.

AU - Oshimura, N.

AU - Ishikawa, T.

AU - Ohmori, K.

PY - 2007/10

Y1 - 2007/10

N2 - The magnetic domain structure and magnetization process in Sm 2(Fe0.95,Mn0.05)17N5.0 powders are investigated by Lorentz microscopy and electron holography, The magnetic domain walls are aligned along the magnetization easy axis (c axis) and are connected with one another along amorphous layers that are distributed along the direction parallel to the c axis. On the other hand, it is found that the domain walls are always located in the amorphous layer after domain wall motion. These results reveal that the amorphous layers are the pinning centers of the domain walls. Thus, it is reasonable to consider that the coercivity of a Sm2(Fe0.95,Mn0.05)17N5.0 powder is strongly affected by the distribution of the amorphous layers in the powder.

AB - The magnetic domain structure and magnetization process in Sm 2(Fe0.95,Mn0.05)17N5.0 powders are investigated by Lorentz microscopy and electron holography, The magnetic domain walls are aligned along the magnetization easy axis (c axis) and are connected with one another along amorphous layers that are distributed along the direction parallel to the c axis. On the other hand, it is found that the domain walls are always located in the amorphous layer after domain wall motion. These results reveal that the amorphous layers are the pinning centers of the domain walls. Thus, it is reasonable to consider that the coercivity of a Sm2(Fe0.95,Mn0.05)17N5.0 powder is strongly affected by the distribution of the amorphous layers in the powder.

KW - Coercivity mechanism

KW - Electron holography

KW - Lorentz microscopy

KW - Samarium-iron-manganese-nitrogen coarse powder

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Magnetic domain structure and magnetic hardening in Sm-Fe-Mn-N coarse powder

Abstract

Keywords

ASJC Scopus subject areas

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