Formation of octahedral FePt nanoparticles by alternate deposition of FePt and MgO

T. Shima; K. Takanashi; Y. K. Takahashi; K. Hono

doi:10.1063/1.2172710

Formation of octahedral FePt nanoparticles by alternate deposition of FePt and MgO

T. Shima, K. Takanashi, Y. K. Takahashi, K. Hono

Collaborative Research Center on Energy Materials

Research output: Contribution to journal › Review article › peer-review

47 Citations (Scopus)

Abstract

Two-dimensional assemblies of octahedral-shaped FePt nanoparticles embedded in a MgO matrix were formed by alternate deposition of FePt and MgO layers on MgO (001) single-crystal substrates with a thermal cycling process. Highly ordered L 10 structure with the [001] orientation perpendicular to the plane and large coercivity of more than 60 kOe were obtained. Cross-sectional transmission electron microscopy observation revealed that the equilibrium crystal shape of L 10 ordered FePt particles was octahedral structure due to the anisotropy of the surface energy. The {111} plane shows the minimum surface energy in the L 10 structure, which is similar to the case of face-centered-cubic structure.

Original language	English
Article number	063117
Journal	Applied Physics Letters
Volume	88
Issue number	6
DOIs	https://doi.org/10.1063/1.2172710
Publication status	Published - 2006 Feb

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2172710

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title = "Formation of octahedral FePt nanoparticles by alternate deposition of FePt and MgO",

abstract = "Two-dimensional assemblies of octahedral-shaped FePt nanoparticles embedded in a MgO matrix were formed by alternate deposition of FePt and MgO layers on MgO (001) single-crystal substrates with a thermal cycling process. Highly ordered L 10 structure with the [001] orientation perpendicular to the plane and large coercivity of more than 60 kOe were obtained. Cross-sectional transmission electron microscopy observation revealed that the equilibrium crystal shape of L 10 ordered FePt particles was octahedral structure due to the anisotropy of the surface energy. The {111} plane shows the minimum surface energy in the L 10 structure, which is similar to the case of face-centered-cubic structure.",

author = "T. Shima and K. Takanashi and Takahashi, {Y. K.} and K. Hono",

note = "Funding Information: This work was partly supported by the Special Coordination Funds for Promoting Science and Technology on “Nanohetero Metallic Materials” from the MEXT. X-ray diffraction measurements were performed at the Laboratory for Advanced Materials, IMR, Tohoku University. High field magnetic measurements were performed at the Centre for Low Temperature Science, Tohoku University. The authors would like to acknowledge Y. Murakami for technical assistance.",

year = "2006",

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doi = "10.1063/1.2172710",

language = "English",

volume = "88",

journal = "Applied Physics Letters",

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T1 - Formation of octahedral FePt nanoparticles by alternate deposition of FePt and MgO

AU - Shima, T.

AU - Takanashi, K.

AU - Takahashi, Y. K.

AU - Hono, K.

N1 - Funding Information: This work was partly supported by the Special Coordination Funds for Promoting Science and Technology on “Nanohetero Metallic Materials” from the MEXT. X-ray diffraction measurements were performed at the Laboratory for Advanced Materials, IMR, Tohoku University. High field magnetic measurements were performed at the Centre for Low Temperature Science, Tohoku University. The authors would like to acknowledge Y. Murakami for technical assistance.

PY - 2006/2

Y1 - 2006/2

N2 - Two-dimensional assemblies of octahedral-shaped FePt nanoparticles embedded in a MgO matrix were formed by alternate deposition of FePt and MgO layers on MgO (001) single-crystal substrates with a thermal cycling process. Highly ordered L 10 structure with the [001] orientation perpendicular to the plane and large coercivity of more than 60 kOe were obtained. Cross-sectional transmission electron microscopy observation revealed that the equilibrium crystal shape of L 10 ordered FePt particles was octahedral structure due to the anisotropy of the surface energy. The {111} plane shows the minimum surface energy in the L 10 structure, which is similar to the case of face-centered-cubic structure.

AB - Two-dimensional assemblies of octahedral-shaped FePt nanoparticles embedded in a MgO matrix were formed by alternate deposition of FePt and MgO layers on MgO (001) single-crystal substrates with a thermal cycling process. Highly ordered L 10 structure with the [001] orientation perpendicular to the plane and large coercivity of more than 60 kOe were obtained. Cross-sectional transmission electron microscopy observation revealed that the equilibrium crystal shape of L 10 ordered FePt particles was octahedral structure due to the anisotropy of the surface energy. The {111} plane shows the minimum surface energy in the L 10 structure, which is similar to the case of face-centered-cubic structure.

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U2 - 10.1063/1.2172710

DO - 10.1063/1.2172710

M3 - Review article

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JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 6

M1 - 063117

ER -

Formation of octahedral FePt nanoparticles by alternate deposition of FePt and MgO

Abstract

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