Microstructure and magnetic properties of FePt thin films epitaxially grown on MgO (0 0 1) substrates

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

doi:10.1016/S0304-8853(03)00377-9

Microstructure and magnetic properties of FePt thin films epitaxially grown on MgO (0 0 1) substrates

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

IMRAM - Division of Inorganic Material Research

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

79 Citations (Scopus)

Abstract

We have investigated the microstructures and the magnetic properties of 10nm thick FePt films epitaxially grown on MgO (0 0 1) substrates at various substrate temperatures, T_s. The long-range-order parameter of the L1₀ structure and the coercivity increased above T_s = 450°C with a drastic change in the film morphology from continuous structure to island-like one. A huge coercivity of 42kOe obtained at T _s = 700°C is attributed to complete magnetic isolation of nanometer-scale particles as well as perfect uniaxial alignment of c-axis in the normal direction to the film.

Original language	English
Pages (from-to)	248-255
Number of pages	8
Journal	Journal of Magnetism and Magnetic Materials
Volume	267
Issue number	2
DOIs	https://doi.org/10.1016/S0304-8853(03)00377-9
Publication status	Published - 2003 Dec

Keywords

Coercivity
Epitaxial film
FePt
Microstructure

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10.1016/S0304-8853(03)00377-9

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title = "Microstructure and magnetic properties of FePt thin films epitaxially grown on MgO (0 0 1) substrates",

abstract = "We have investigated the microstructures and the magnetic properties of 10nm thick FePt films epitaxially grown on MgO (0 0 1) substrates at various substrate temperatures, Ts. The long-range-order parameter of the L10 structure and the coercivity increased above Ts = 450°C with a drastic change in the film morphology from continuous structure to island-like one. A huge coercivity of 42kOe obtained at T s = 700°C is attributed to complete magnetic isolation of nanometer-scale particles as well as perfect uniaxial alignment of c-axis in the normal direction to the film.",

keywords = "Coercivity, Epitaxial film, FePt, Microstructure",

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

note = "Funding Information: This work was supported by the Special Coordination Funds for Promoting Science and Technology on “Nanohetero Metallic Materials” from the Ministry of Education, Culture, Sports, Science and Technology. One of the authors (YKT) acknowledges Japan Science Promotion Society for a JSPS fellowship.",

year = "2003",

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doi = "10.1016/S0304-8853(03)00377-9",

language = "English",

volume = "267",

pages = "248--255",

journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Microstructure and magnetic properties of FePt thin films epitaxially grown on MgO (0 0 1) substrates

AU - Takahashi, Y. K.

AU - Hono, K.

AU - Shima, T.

AU - Takanashi, K.

N1 - Funding Information: This work was supported by the Special Coordination Funds for Promoting Science and Technology on “Nanohetero Metallic Materials” from the Ministry of Education, Culture, Sports, Science and Technology. One of the authors (YKT) acknowledges Japan Science Promotion Society for a JSPS fellowship.

PY - 2003/12

Y1 - 2003/12

N2 - We have investigated the microstructures and the magnetic properties of 10nm thick FePt films epitaxially grown on MgO (0 0 1) substrates at various substrate temperatures, Ts. The long-range-order parameter of the L10 structure and the coercivity increased above Ts = 450°C with a drastic change in the film morphology from continuous structure to island-like one. A huge coercivity of 42kOe obtained at T s = 700°C is attributed to complete magnetic isolation of nanometer-scale particles as well as perfect uniaxial alignment of c-axis in the normal direction to the film.

AB - We have investigated the microstructures and the magnetic properties of 10nm thick FePt films epitaxially grown on MgO (0 0 1) substrates at various substrate temperatures, Ts. The long-range-order parameter of the L10 structure and the coercivity increased above Ts = 450°C with a drastic change in the film morphology from continuous structure to island-like one. A huge coercivity of 42kOe obtained at T s = 700°C is attributed to complete magnetic isolation of nanometer-scale particles as well as perfect uniaxial alignment of c-axis in the normal direction to the film.

KW - Coercivity

KW - Epitaxial film

KW - FePt

KW - Microstructure

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DO - 10.1016/S0304-8853(03)00377-9

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VL - 267

SP - 248

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2

ER -

Microstructure and magnetic properties of FePt thin films epitaxially grown on MgO (0 0 1) substrates

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Keywords

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