Three dimensional nano-seeding assembly of ferromagnetic Fe/LaSrFeO 4 nano-hetero dot array

K. Okada; T. Sakamoto; K. Fujiwara; A. N. Hattori; T. Kanki; H. Tanaka

doi:10.1063/1.4739719

Three dimensional nano-seeding assembly of ferromagnetic Fe/LaSrFeO ₄ nano-hetero dot array

K. Okada, T. Sakamoto, K. Fujiwara, A. N. Hattori, T. Kanki, H. Tanaka

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

13 Citations (Scopus)

Abstract

Well-ordered ferromagnetic Fe nanodots/LaSrFeO ₄ nanocomposites have been fabricated by self-assembled crystal growth on La-SrTiO ₃ substrates having Fe nanoseed array fabricated by nanoimprint lithography (NIL). The Fe nanoseeds with spacing of 200 nm make possible the formation of perfectly arranged Fe/LaSrFeO ₄ nanocomposites; phase-separated Fe nanodots and the LaSrFeO ₄ matrix grew only on the nanoseeds and on the area except nanoseeds, respectively. A calculation based on a surface diffusion model has indicated that the nanoseed spacing required for the formation of the perfectly arranged nanocomposite is less than 400 nm. Magnetic force microscopy revealed an arrangement of isolated ferromagnetic domain corresponding to Fe nanodots grown on the Fe nanoseeds. The combination of self-assembled growth and NIL gives a route of the rational formation of high-density ferromagnetic memory devices.

Original language	English
Article number	024320
Journal	Journal of Applied Physics
Volume	112
Issue number	2
DOIs	https://doi.org/10.1063/1.4739719
Publication status	Published - 2012 Jul 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Three dimensional nano-seeding assembly of ferromagnetic Fe/LaSrFeO 4 nano-hetero dot array",

abstract = "Well-ordered ferromagnetic Fe nanodots/LaSrFeO 4 nanocomposites have been fabricated by self-assembled crystal growth on La-SrTiO 3 substrates having Fe nanoseed array fabricated by nanoimprint lithography (NIL). The Fe nanoseeds with spacing of 200 nm make possible the formation of perfectly arranged Fe/LaSrFeO 4 nanocomposites; phase-separated Fe nanodots and the LaSrFeO 4 matrix grew only on the nanoseeds and on the area except nanoseeds, respectively. A calculation based on a surface diffusion model has indicated that the nanoseed spacing required for the formation of the perfectly arranged nanocomposite is less than 400 nm. Magnetic force microscopy revealed an arrangement of isolated ferromagnetic domain corresponding to Fe nanodots grown on the Fe nanoseeds. The combination of self-assembled growth and NIL gives a route of the rational formation of high-density ferromagnetic memory devices.",

author = "K. Okada and T. Sakamoto and K. Fujiwara and Hattori, {A. N.} and T. Kanki and H. Tanaka",

note = "Funding Information: We thank M. Sakuma and Y. Fujiwara for experimental help. This work was supported by Grant-in-Aid for Scientific Research on Innovative Areas “Materials Design through Computics: Complex Correlation and Non-equilibrium Dynamics” (No. 23104507) from the Ministry of Education, Science, Sports and Culture, Japan.",

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doi = "10.1063/1.4739719",

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AU - Okada, K.

AU - Sakamoto, T.

AU - Fujiwara, K.

AU - Hattori, A. N.

AU - Kanki, T.

AU - Tanaka, H.

N1 - Funding Information: We thank M. Sakuma and Y. Fujiwara for experimental help. This work was supported by Grant-in-Aid for Scientific Research on Innovative Areas “Materials Design through Computics: Complex Correlation and Non-equilibrium Dynamics” (No. 23104507) from the Ministry of Education, Science, Sports and Culture, Japan.

PY - 2012/7/15

Y1 - 2012/7/15

N2 - Well-ordered ferromagnetic Fe nanodots/LaSrFeO 4 nanocomposites have been fabricated by self-assembled crystal growth on La-SrTiO 3 substrates having Fe nanoseed array fabricated by nanoimprint lithography (NIL). The Fe nanoseeds with spacing of 200 nm make possible the formation of perfectly arranged Fe/LaSrFeO 4 nanocomposites; phase-separated Fe nanodots and the LaSrFeO 4 matrix grew only on the nanoseeds and on the area except nanoseeds, respectively. A calculation based on a surface diffusion model has indicated that the nanoseed spacing required for the formation of the perfectly arranged nanocomposite is less than 400 nm. Magnetic force microscopy revealed an arrangement of isolated ferromagnetic domain corresponding to Fe nanodots grown on the Fe nanoseeds. The combination of self-assembled growth and NIL gives a route of the rational formation of high-density ferromagnetic memory devices.

AB - Well-ordered ferromagnetic Fe nanodots/LaSrFeO 4 nanocomposites have been fabricated by self-assembled crystal growth on La-SrTiO 3 substrates having Fe nanoseed array fabricated by nanoimprint lithography (NIL). The Fe nanoseeds with spacing of 200 nm make possible the formation of perfectly arranged Fe/LaSrFeO 4 nanocomposites; phase-separated Fe nanodots and the LaSrFeO 4 matrix grew only on the nanoseeds and on the area except nanoseeds, respectively. A calculation based on a surface diffusion model has indicated that the nanoseed spacing required for the formation of the perfectly arranged nanocomposite is less than 400 nm. Magnetic force microscopy revealed an arrangement of isolated ferromagnetic domain corresponding to Fe nanodots grown on the Fe nanoseeds. The combination of self-assembled growth and NIL gives a route of the rational formation of high-density ferromagnetic memory devices.

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Three dimensional nano-seeding assembly of ferromagnetic Fe/LaSrFeO ₄ nano-hetero dot array

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