Microstructure and magnetic properties of FePt-SiO2 granular films with Ag addition

T. O. Seki; Y. K. Takahashi; K. Hono

doi:10.1063/1.2828032

Microstructure and magnetic properties of FePt-SiO2 granular films with Ag addition

T. O. Seki, Y. K. Takahashi^*, K. Hono

^*Corresponding author for this work

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

14 Citations (Scopus)

Abstract

Perpendicularly anisotropic L 10 -ordered FePt-SiO2 granular films with an average grain size of 15 nm and a relatively narrow size distribution were prepared by cosputtering Fe, Pt, and SiO2 on MgO (001) substrates at 700 °C. By reducing the substrate temperature to 500 °C, the average grain size was further refined to 6.2 nm with a standard deviation of 1.7 nm; however, the FePt particles remained as an A1 disordered phase. Alloying Ag to the FePt particles and increasing the Ar gas pressure in the sputtering chamber were found to be both beneficial for enhancing the L 10 ordering while keeping the fine granular structure.

Original language	English
Article number	023910
Journal	Journal of Applied Physics
Volume	103
Issue number	2
DOIs	https://doi.org/10.1063/1.2828032
Publication status	Published - 2008
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Microstructure and magnetic properties of FePt-SiO2 granular films with Ag addition",

abstract = "Perpendicularly anisotropic L 10 -ordered FePt-SiO2 granular films with an average grain size of 15 nm and a relatively narrow size distribution were prepared by cosputtering Fe, Pt, and SiO2 on MgO (001) substrates at 700 °C. By reducing the substrate temperature to 500 °C, the average grain size was further refined to 6.2 nm with a standard deviation of 1.7 nm; however, the FePt particles remained as an A1 disordered phase. Alloying Ag to the FePt particles and increasing the Ar gas pressure in the sputtering chamber were found to be both beneficial for enhancing the L 10 ordering while keeping the fine granular structure.",

author = "Seki, {T. O.} and Takahashi, {Y. K.} and K. Hono",

note = "Funding Information: One of the authors (T.O.S) acknowledges the National Institute for Materials Science for the provision of a NIMS Junior Research Assistantship. This work was in part supported by the Ministry of Education, Science, Sports, and Culture of Japan, Grant-in-Aid for Young Scientists (B), 18760537, 2006, and International Center for Materials Nanoarchitectonics (MANA).",

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doi = "10.1063/1.2828032",

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AU - Seki, T. O.

AU - Takahashi, Y. K.

AU - Hono, K.

N1 - Funding Information: One of the authors (T.O.S) acknowledges the National Institute for Materials Science for the provision of a NIMS Junior Research Assistantship. This work was in part supported by the Ministry of Education, Science, Sports, and Culture of Japan, Grant-in-Aid for Young Scientists (B), 18760537, 2006, and International Center for Materials Nanoarchitectonics (MANA).

PY - 2008

Y1 - 2008

N2 - Perpendicularly anisotropic L 10 -ordered FePt-SiO2 granular films with an average grain size of 15 nm and a relatively narrow size distribution were prepared by cosputtering Fe, Pt, and SiO2 on MgO (001) substrates at 700 °C. By reducing the substrate temperature to 500 °C, the average grain size was further refined to 6.2 nm with a standard deviation of 1.7 nm; however, the FePt particles remained as an A1 disordered phase. Alloying Ag to the FePt particles and increasing the Ar gas pressure in the sputtering chamber were found to be both beneficial for enhancing the L 10 ordering while keeping the fine granular structure.

AB - Perpendicularly anisotropic L 10 -ordered FePt-SiO2 granular films with an average grain size of 15 nm and a relatively narrow size distribution were prepared by cosputtering Fe, Pt, and SiO2 on MgO (001) substrates at 700 °C. By reducing the substrate temperature to 500 °C, the average grain size was further refined to 6.2 nm with a standard deviation of 1.7 nm; however, the FePt particles remained as an A1 disordered phase. Alloying Ag to the FePt particles and increasing the Ar gas pressure in the sputtering chamber were found to be both beneficial for enhancing the L 10 ordering while keeping the fine granular structure.

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Microstructure and magnetic properties of FePt-SiO2 granular films with Ag addition

Abstract

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