Fabrication of [001] <i>L</i>1-FePtRh ferro-antiferromagnetic pattern by flat-patterning method

Hasegawa, Takashi; Tomioka, T.; Yamane, Haruki; Ishio, S.

doi:10.1063/1.3673421

Journal of Applied Physics

2012

DOI: 10.1063/1.3673421

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Fabrication of [001] L1-FePtRh ferro-antiferromagnetic pattern by flat-patterning method

Takashi Hasegawa

T. Tomioka

Haruki Yamane

et al.

Abstract: A flat-patterning method that exploits the ferromagnetic (FM) -antiferromagnetic (AF) transition in [001]-oriented L1 0 FePt 1-x Rh x films was investigated. FM-AF patterns with dot diameters between 15 and 1000 nm were fabricated by locally diffusing a small percentage of FePt atoms onto the FePt 1-x Rh x film. The geometric and magnetic properties of the patterns were analyzed in detail. Only the area whose composition crossed the FM-AF threshold underwent a magnetic phase change to the FM phase. FM dots wit… Show more

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Cited by 4 publications

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Shape-induced anisotropy in antiferromagnetic nanoparticles

Gomonay¹,

Kondovych²,

Локтев³

2014

Journal of Magnetism and Magnetic Materials

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High fraction of the surface atoms considerably enhances the influence of size and shape on the magnetic and electronic properties of nanoparticles. Shape effects in ferromagnetic nanoparticles are well understood and allow to set and control the parameters of a sample that affect its magnetic anisotropy during production. In the present paper we study the shape effects in the other widely used magnetic materials -antiferromagnets, -which possess vanishingly small or zero macroscopic magnetization. We take into account the difference between the surface and bulk magnetic anisotropy of a nanoparticle and show that the effective magnetic anisotropy depends on the particle shape and crystallographic orientation of its faces. Corresponding shape-induced contribution to the magnetic anisotropy energy is proportional to the particle volume, depends on magnetostriction, and can cause formation of equilibrium domain structure. Crystallographic orientation of the nanoparticle surface determines the type of domain structure. The proposed model allows to predict the magnetic properties of antiferromagnetic nanoparticles depending on their shape and treatment.

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Shape-induced anisotropy in antiferromagnetic nanoparticles

Gomonay¹,

Kondovych²,

Локтев³

2014

Journal of Magnetism and Magnetic Materials

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Fabrication of dot pattern using magnetic phase change on Pt ion-implanted L1 FePtRh film with high magnetocrystalline anisotropy

Hasegawa

Yamazaki

Ishio

2014

Journal of Applied Physics

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Phase change from ferromagnetic to nonmagnetic phase by ion implantation was investigated for bit patterning. An antiferromagnetic L10 FePt0.64Rh0.36 film was implanted with Pt ions at 6.0 × 1015 ions/cm2 in order to control its magnetic properties. The film changed to a ferromagnetic one, with the (001) crystalline texture being normal to the film plane and a magnetocrystalline anisotropy of 2.3 × 107 erg/cm3 in the perpendicular direction. Using this magnetic phase change, a planar dot pattern was fabricated. The average height between the dots and the spacing was 0.35 nm, and ferromagnetic dots 50 nm in diameter were observed.

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Ferromagnetic-Paramagnetic Patterning of FePtRh Films by Fe Ion Implantation

Hasegawa

Yamane

Nagamachi³

et al. 2013

IEEE Trans. Magn.

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Fabrication of [001] L1-FePtRh ferro-antiferromagnetic pattern by flat-patterning method

Cited by 4 publications

References 15 publications

Shape-induced anisotropy in antiferromagnetic nanoparticles

Shape-induced anisotropy in antiferromagnetic nanoparticles

Fabrication of dot pattern using magnetic phase change on Pt ion-implanted L1 FePtRh film with high magnetocrystalline anisotropy

Ferromagnetic-Paramagnetic Patterning of FePtRh Films by Fe Ion Implantation

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