Highly coercive thin-film nanostructures

J. Zhou; R. Skomski; A. Kashyap; K. D. Sorge; Y. Sui; M. Daniil; L. Gao; M. L. Yan; S. H. Liou; R. D. Kirby; D. J. Sellmyer

doi:10.1016/j.jmmm.2004.11.189

Highly coercive thin-film nanostructures

J. Zhou, R. Skomski, A. Kashyap, K. D. Sorge, Y. Sui, M. Daniil, L. Gao, M. L. Yan, S. H. Liou, R. D. Kirby, D. J. Sellmyer

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

9 Scopus citations

Abstract

The processing, structure, and magnetism of highly coercive Sm-Co and FePt thin-film nanostructures are investigated. The structures include 1:5 based Sm-Co-Cu-Ti magnets, particulate FePt:C thin films, and FePt nanotubes. As in other systems, the coercivity depends on texture and imperfections, but there are some additional features. A specific coercivity mechanism in particulate media is a discrete pinning mode intermediate between Stoner-Wohlfarth rotation and ordinary domain-wall pinning. This mechanism yields a coercivity maximum for intermediate intergranular exchange and explains the occurrence of coercivities of 5 T in particulate Sm-Co-Cu-Ti magnets.

Original language	English (US)
Pages (from-to)	227-230
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	290-291 PART 1
DOIs	https://doi.org/10.1016/j.jmmm.2004.11.189
State	Published - Apr 2005

Keywords

Coercivity
Domain-wall pinning
Hard magnetic materials
Magnetic nanostructures
Magnetization reversal

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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@article{6d7af5d9f9d840c6844a6aee52c8bd66,

title = "Highly coercive thin-film nanostructures",

abstract = "The processing, structure, and magnetism of highly coercive Sm-Co and FePt thin-film nanostructures are investigated. The structures include 1:5 based Sm-Co-Cu-Ti magnets, particulate FePt:C thin films, and FePt nanotubes. As in other systems, the coercivity depends on texture and imperfections, but there are some additional features. A specific coercivity mechanism in particulate media is a discrete pinning mode intermediate between Stoner-Wohlfarth rotation and ordinary domain-wall pinning. This mechanism yields a coercivity maximum for intermediate intergranular exchange and explains the occurrence of coercivities of 5 T in particulate Sm-Co-Cu-Ti magnets.",

keywords = "Coercivity, Domain-wall pinning, Hard magnetic materials, Magnetic nanostructures, Magnetization reversal",

author = "J. Zhou and R. Skomski and A. Kashyap and Sorge, {K. D.} and Y. Sui and M. Daniil and L. Gao and Yan, {M. L.} and Liou, {S. H.} and Kirby, {R. D.} and Sellmyer, {D. J.}",

note = "Funding Information: This research is supported by DOE, AFOSR, NSF-MRSEC, the W.M. Keck Foundation, and CMRA. ",

year = "2005",

month = apr,

doi = "10.1016/j.jmmm.2004.11.189",

language = "English (US)",

volume = "290-291 PART 1",

pages = "227--230",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

}

TY - JOUR

T1 - Highly coercive thin-film nanostructures

AU - Zhou, J.

AU - Skomski, R.

AU - Kashyap, A.

AU - Sorge, K. D.

AU - Sui, Y.

AU - Daniil, M.

AU - Gao, L.

AU - Yan, M. L.

AU - Liou, S. H.

AU - Kirby, R. D.

AU - Sellmyer, D. J.

N1 - Funding Information: This research is supported by DOE, AFOSR, NSF-MRSEC, the W.M. Keck Foundation, and CMRA.

PY - 2005/4

Y1 - 2005/4

N2 - The processing, structure, and magnetism of highly coercive Sm-Co and FePt thin-film nanostructures are investigated. The structures include 1:5 based Sm-Co-Cu-Ti magnets, particulate FePt:C thin films, and FePt nanotubes. As in other systems, the coercivity depends on texture and imperfections, but there are some additional features. A specific coercivity mechanism in particulate media is a discrete pinning mode intermediate between Stoner-Wohlfarth rotation and ordinary domain-wall pinning. This mechanism yields a coercivity maximum for intermediate intergranular exchange and explains the occurrence of coercivities of 5 T in particulate Sm-Co-Cu-Ti magnets.

AB - The processing, structure, and magnetism of highly coercive Sm-Co and FePt thin-film nanostructures are investigated. The structures include 1:5 based Sm-Co-Cu-Ti magnets, particulate FePt:C thin films, and FePt nanotubes. As in other systems, the coercivity depends on texture and imperfections, but there are some additional features. A specific coercivity mechanism in particulate media is a discrete pinning mode intermediate between Stoner-Wohlfarth rotation and ordinary domain-wall pinning. This mechanism yields a coercivity maximum for intermediate intergranular exchange and explains the occurrence of coercivities of 5 T in particulate Sm-Co-Cu-Ti magnets.

KW - Coercivity

KW - Domain-wall pinning

KW - Hard magnetic materials

KW - Magnetic nanostructures

KW - Magnetization reversal

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UR - http://www.scopus.com/inward/citedby.url?scp=20144365024&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2004.11.189

DO - 10.1016/j.jmmm.2004.11.189

M3 - Article

AN - SCOPUS:20144365024

VL - 290-291 PART 1

SP - 227

EP - 230

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

ER -

Highly coercive thin-film nanostructures

Abstract

Keywords

ASJC Scopus subject areas

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