Fabrication and magnetization reversal of L10 FeMnPt dots surrounded by paramagnetic A1 phase formed by ion irradiation

Takashi Hasegawa; K. Sasaki; Craig Barton; Thomas Thomson

doi:10.1016/j.scriptamat.2017.08.009

Fabrication and magnetization reversal of L10 FeMnPt dots surrounded by paramagnetic A1 phase formed by ion irradiation

Takashi Hasegawa, K. Sasaki, Craig Barton, Thomas Thomson

Nano Engineering and Spintronic Technologies

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

Abstract

A nanopatterning method involving a ferromagnetic (FM)–paramagnetic (PM) phase transformation caused by ion irradiation has been developed. A (Fe_0.56Mn_0.44)₅₀Pt₅₀ film with the ordered L1₀ structure and uniaxial magnetocrystalline anisotropy constant (K_u) of 2.1 × 10⁶ J m-3 was fabricated. Mn ion irradiation produced a smooth FM dot array with dot diameters of 100 nm surrounded by the PM phase, which was obtained from the induced FM–PM phase transition caused by the structural transformation from the L1₀ structure to the disordered A1 structure and a slight increase in the Mn content. The magnetization reversal process was studied by investigating the angle dependence of the dot reversal field.

Original language	English
Journal	Scripta Materialia
DOIs	https://doi.org/10.1016/j.scriptamat.2017.08.009
Publication status	Published - 10 Aug 2017

Keywords

Iron alloys
order-disorder phenomena
Nanostructured materials
ion-beam processing
magnetic recording media

Research Beacons, Institutes and Platforms

National Graphene Institute

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10.1016/j.scriptamat.2017.08.009Licence: CC BY

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title = "Fabrication and magnetization reversal of L10 FeMnPt dots surrounded by paramagnetic A1 phase formed by ion irradiation",

abstract = "A nanopatterning method involving a ferromagnetic (FM)–paramagnetic (PM) phase transformation caused by ion irradiation has been developed. A (Fe0.56Mn0.44)50Pt50 film with the ordered L10 structure and uniaxial magnetocrystalline anisotropy constant (Ku) of 2.1 × 106 J m-3 was fabricated. Mn ion irradiation produced a smooth FM dot array with dot diameters of 100 nm surrounded by the PM phase, which was obtained from the induced FM–PM phase transition caused by the structural transformation from the L10 structure to the disordered A1 structure and a slight increase in the Mn content. The magnetization reversal process was studied by investigating the angle dependence of the dot reversal field.",

keywords = "Iron alloys, order-disorder phenomena, Nanostructured materials, ion-beam processing, magnetic recording media",

author = "Takashi Hasegawa and K. Sasaki and Craig Barton and Thomas Thomson",

year = "2017",

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day = "10",

doi = "10.1016/j.scriptamat.2017.08.009",

language = "English",

journal = "Scripta Materialia",

issn = "1359-6462",

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TY - JOUR

T1 - Fabrication and magnetization reversal of L10 FeMnPt dots surrounded by paramagnetic A1 phase formed by ion irradiation

AU - Hasegawa, Takashi

AU - Sasaki, K.

AU - Barton, Craig

AU - Thomson, Thomas

PY - 2017/8/10

Y1 - 2017/8/10

N2 - A nanopatterning method involving a ferromagnetic (FM)–paramagnetic (PM) phase transformation caused by ion irradiation has been developed. A (Fe0.56Mn0.44)50Pt50 film with the ordered L10 structure and uniaxial magnetocrystalline anisotropy constant (Ku) of 2.1 × 106 J m-3 was fabricated. Mn ion irradiation produced a smooth FM dot array with dot diameters of 100 nm surrounded by the PM phase, which was obtained from the induced FM–PM phase transition caused by the structural transformation from the L10 structure to the disordered A1 structure and a slight increase in the Mn content. The magnetization reversal process was studied by investigating the angle dependence of the dot reversal field.

AB - A nanopatterning method involving a ferromagnetic (FM)–paramagnetic (PM) phase transformation caused by ion irradiation has been developed. A (Fe0.56Mn0.44)50Pt50 film with the ordered L10 structure and uniaxial magnetocrystalline anisotropy constant (Ku) of 2.1 × 106 J m-3 was fabricated. Mn ion irradiation produced a smooth FM dot array with dot diameters of 100 nm surrounded by the PM phase, which was obtained from the induced FM–PM phase transition caused by the structural transformation from the L10 structure to the disordered A1 structure and a slight increase in the Mn content. The magnetization reversal process was studied by investigating the angle dependence of the dot reversal field.

KW - Iron alloys

KW - order-disorder phenomena

KW - Nanostructured materials

KW - ion-beam processing

KW - magnetic recording media

U2 - 10.1016/j.scriptamat.2017.08.009

DO - 10.1016/j.scriptamat.2017.08.009

M3 - Article

SN - 1359-6462

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Fabrication and magnetization reversal of L10 FeMnPt dots surrounded by paramagnetic A1 phase formed by ion irradiation

Abstract

Keywords

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