Aligned and exchange-coupled FePt-based films

Y. Liu; T. A. George; Ralph Skomski; D. J. Sellmyer

doi:10.1063/1.3656038

Aligned and exchange-coupled FePt-based films

Y. Liu, T. A. George, Ralph Skomski, D. J. Sellmyer

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

51 Scopus citations

Abstract

Two-phase nanostructures of hard L1₀-ordered FePt and soft iron-rich fcc Fe-Pt are investigated experimentally and by model calculations. The Fe-Pt thin films were produced by epitaxial co-sputtering onto MgO and have a thickness of about 10 nm. They form two-phase dots that cover a large fraction of the surface but are separated from each other. X-ray diffraction and TEM show that the c-axis of the phase FePt is aligned in the direction normal to the film plane. The experimental and theoretical hysteresis loops indicate archetypical exchange coupling, and excellent magnetic properties are obtained. The largest values of coercivity, saturation magnetization, and nominal energy product obtained in the samples studied are 51 kOe, 1287 emu/cc, and 54 MGOe, respectively.

Original language	English (US)
Article number	172504
Journal	Applied Physics Letters
Volume	99
Issue number	17
DOIs	https://doi.org/10.1063/1.3656038
State	Published - Oct 24 2011
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3656038

Cite this

@article{2d2d13006629493db7549cde6f4d2dd4,

title = "Aligned and exchange-coupled FePt-based films",

abstract = "Two-phase nanostructures of hard L10-ordered FePt and soft iron-rich fcc Fe-Pt are investigated experimentally and by model calculations. The Fe-Pt thin films were produced by epitaxial co-sputtering onto MgO and have a thickness of about 10 nm. They form two-phase dots that cover a large fraction of the surface but are separated from each other. X-ray diffraction and TEM show that the c-axis of the phase FePt is aligned in the direction normal to the film plane. The experimental and theoretical hysteresis loops indicate archetypical exchange coupling, and excellent magnetic properties are obtained. The largest values of coercivity, saturation magnetization, and nominal energy product obtained in the samples studied are 51 kOe, 1287 emu/cc, and 54 MGOe, respectively.",

author = "Y. Liu and George, {T. A.} and Ralph Skomski and Sellmyer, {D. J.}",

note = "Funding Information: This work is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award No. DE-FG02-04ER46152 (film preparation, characterization, theory (YL, RS, and DJS), National Science Foundation Materials Science and Engineering Center under Award No. DMR-0820521 (film preparation (TAG)), and the Nebraska Center for Materials and Nanoscience (Central Facility support). The authors are grateful to A. Kashyap, R. D. Kirby, S.-H. Liou, and P. K. Sahota for helpful discussions and to S. Michalski for experimental assistance.",

year = "2011",

month = oct,

day = "24",

doi = "10.1063/1.3656038",

language = "English (US)",

volume = "99",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "17",

}

TY - JOUR

T1 - Aligned and exchange-coupled FePt-based films

AU - Liu, Y.

AU - George, T. A.

AU - Skomski, Ralph

AU - Sellmyer, D. J.

N1 - Funding Information: This work is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award No. DE-FG02-04ER46152 (film preparation, characterization, theory (YL, RS, and DJS), National Science Foundation Materials Science and Engineering Center under Award No. DMR-0820521 (film preparation (TAG)), and the Nebraska Center for Materials and Nanoscience (Central Facility support). The authors are grateful to A. Kashyap, R. D. Kirby, S.-H. Liou, and P. K. Sahota for helpful discussions and to S. Michalski for experimental assistance.

PY - 2011/10/24

Y1 - 2011/10/24

N2 - Two-phase nanostructures of hard L10-ordered FePt and soft iron-rich fcc Fe-Pt are investigated experimentally and by model calculations. The Fe-Pt thin films were produced by epitaxial co-sputtering onto MgO and have a thickness of about 10 nm. They form two-phase dots that cover a large fraction of the surface but are separated from each other. X-ray diffraction and TEM show that the c-axis of the phase FePt is aligned in the direction normal to the film plane. The experimental and theoretical hysteresis loops indicate archetypical exchange coupling, and excellent magnetic properties are obtained. The largest values of coercivity, saturation magnetization, and nominal energy product obtained in the samples studied are 51 kOe, 1287 emu/cc, and 54 MGOe, respectively.

AB - Two-phase nanostructures of hard L10-ordered FePt and soft iron-rich fcc Fe-Pt are investigated experimentally and by model calculations. The Fe-Pt thin films were produced by epitaxial co-sputtering onto MgO and have a thickness of about 10 nm. They form two-phase dots that cover a large fraction of the surface but are separated from each other. X-ray diffraction and TEM show that the c-axis of the phase FePt is aligned in the direction normal to the film plane. The experimental and theoretical hysteresis loops indicate archetypical exchange coupling, and excellent magnetic properties are obtained. The largest values of coercivity, saturation magnetization, and nominal energy product obtained in the samples studied are 51 kOe, 1287 emu/cc, and 54 MGOe, respectively.

UR - http://www.scopus.com/inward/record.url?scp=80555154268&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80555154268&partnerID=8YFLogxK

U2 - 10.1063/1.3656038

DO - 10.1063/1.3656038

M3 - Article

AN - SCOPUS:80555154268

SN - 0003-6951

VL - 99

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 17

M1 - 172504

ER -

Aligned and exchange-coupled FePt-based films

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this