Microstructure and magnetic properties of FePt-SiO{sub 2} granular films with Ag addition

Journal Article · Tue Jan 15 00:00:00 EST 2008 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2828032· OSTI ID:21064519

Seki, T O; Takahashi, Y K; Hono, K ^[1]

---

1. Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8577 (Japan)

Perpendicularly anisotropic L1{sub 0}-ordered FePt-SiO{sub 2} granular films with an average grain size of 15 nm and a relatively narrow size distribution were prepared by cosputtering Fe, Pt, and SiO{sub 2} on MgO (001) substrates at 700 deg. C. By reducing the substrate temperature to 500 deg. 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 L1{sub 0} ordering while keeping the fine granular structure.

• OSTI ID: 21064519
• Journal Information: Journal of Applied Physics, Vol. 103, Issue 2; Other Information: DOI: 10.1063/1.2828032; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
GRAIN SIZE
IRON ALLOYS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
PARTICLES
PLATINUM ALLOYS
SILICON OXIDES
SILVER
SPUTTERING
SUBSTRATES
SURFACE COATING
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K
THIN FILMS