Predicting the future of permanent-magnet materials

Ralph Skomski; Priyanka Manchanda; Pankaj K. Kumar; B. Balamurugan; Arti Kashyap; D. J. Sellmyer

doi:10.1109/TMAG.2013.2248139

Predicting the future of permanent-magnet materials

Ralph Skomski, Priyanka Manchanda, Pankaj K. Kumar, B. Balamurugan, Arti Kashyap, D. J. Sellmyer

Physics and Astronomy

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

181 Scopus citations

Abstract

There are two main thrusts towards new permanent-magnet materials: improving extrinsic properties by nanostructuring and intrinsic properties by atomic structuring. Theory - both numerical and analytical - plays an important role in this ambitious research. Our analysis of aligned hard-soft nanostructures shows that soft-in-hard geometries are better than hard-in-soft geometries and that embedded soft spheres are better than sandwiched soft layers. Concerning the choice of the hard phase, both a high magnetization and a high anisotropy are necessary. As an example of first-principle research, we consider interatomic Mn exchange in MnAl and find strongly ferromagnetic intralayer exchange, in spite of the small Mn-Mn distances.

Original language	English (US)
Article number	6558995
Pages (from-to)	3215-3220
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	49
Issue number	7
DOIs	https://doi.org/10.1109/TMAG.2013.2248139
State	Published - 2013

Keywords

Magnetic anisotropy
magnetization processes
permanent magnets

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2013.2248139

Cite this

@article{c2b2337b218b43e182e2ba2e22730ac9,

title = "Predicting the future of permanent-magnet materials",

abstract = "There are two main thrusts towards new permanent-magnet materials: improving extrinsic properties by nanostructuring and intrinsic properties by atomic structuring. Theory - both numerical and analytical - plays an important role in this ambitious research. Our analysis of aligned hard-soft nanostructures shows that soft-in-hard geometries are better than hard-in-soft geometries and that embedded soft spheres are better than sandwiched soft layers. Concerning the choice of the hard phase, both a high magnetization and a high anisotropy are necessary. As an example of first-principle research, we consider interatomic Mn exchange in MnAl and find strongly ferromagnetic intralayer exchange, in spite of the small Mn-Mn distances.",

keywords = "Magnetic anisotropy, magnetization processes, permanent magnets",

author = "Ralph Skomski and Priyanka Manchanda and Kumar, {Pankaj K.} and B. Balamurugan and Arti Kashyap and Sellmyer, {D. J.}",

year = "2013",

doi = "10.1109/TMAG.2013.2248139",

language = "English (US)",

volume = "49",

pages = "3215--3220",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "7",

}

TY - JOUR

T1 - Predicting the future of permanent-magnet materials

AU - Skomski, Ralph

AU - Manchanda, Priyanka

AU - Kumar, Pankaj K.

AU - Balamurugan, B.

AU - Kashyap, Arti

AU - Sellmyer, D. J.

PY - 2013

Y1 - 2013

N2 - There are two main thrusts towards new permanent-magnet materials: improving extrinsic properties by nanostructuring and intrinsic properties by atomic structuring. Theory - both numerical and analytical - plays an important role in this ambitious research. Our analysis of aligned hard-soft nanostructures shows that soft-in-hard geometries are better than hard-in-soft geometries and that embedded soft spheres are better than sandwiched soft layers. Concerning the choice of the hard phase, both a high magnetization and a high anisotropy are necessary. As an example of first-principle research, we consider interatomic Mn exchange in MnAl and find strongly ferromagnetic intralayer exchange, in spite of the small Mn-Mn distances.

AB - There are two main thrusts towards new permanent-magnet materials: improving extrinsic properties by nanostructuring and intrinsic properties by atomic structuring. Theory - both numerical and analytical - plays an important role in this ambitious research. Our analysis of aligned hard-soft nanostructures shows that soft-in-hard geometries are better than hard-in-soft geometries and that embedded soft spheres are better than sandwiched soft layers. Concerning the choice of the hard phase, both a high magnetization and a high anisotropy are necessary. As an example of first-principle research, we consider interatomic Mn exchange in MnAl and find strongly ferromagnetic intralayer exchange, in spite of the small Mn-Mn distances.

KW - Magnetic anisotropy

KW - magnetization processes

KW - permanent magnets

UR - http://www.scopus.com/inward/record.url?scp=84880842302&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880842302&partnerID=8YFLogxK

U2 - 10.1109/TMAG.2013.2248139

DO - 10.1109/TMAG.2013.2248139

M3 - Article

AN - SCOPUS:84880842302

SN - 0018-9464

VL - 49

SP - 3215

EP - 3220

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 7

M1 - 6558995

ER -

Predicting the future of permanent-magnet materials

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this