Structure and magnetic behavior of reactive sputter deposited nanocomposite FePt–TiN films

• Published in: Thin solid films Vol. 459; no. 1; pp. 208 - 211
• Main Authors: Sakurai, Ryou, Yamamoto, Yuki, Chen, Changchuan, Hashimoto, Mituru, Shi, Ji, Nakamura, Yoshio, Nittono, Osamu
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01.07.2004; Elsevier Science
• Subjects: Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Cross-disciplinary physics: materials science; rheology; Deposition by sputtering; Exact sciences and technology; FePt–TiN; L1 0 structure; Magnetic property; Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Nanocomposite; Ordering transformation; Physics; Treatment of materials and its effects on microstructure and properties; Magnetic property; L1 0 structure; 75.50.Vv; 75.70.Ak; 75.50.Kj; FePt–TiN; Nanocomposite; 75.30.Gw; Ordering transformation; Inorganic compounds; Films; Electron diffraction; Iron alloys; Order parameters; Crystal growth from vapors; XRD; Titanium nitrides; Coercive force; 75.70.Ak FePt-TiN; Ordering; Thermal annealing; Ordering transformation: L10 structure; Magnetization; Transition element compounds; Platinum alloys; Magnetic hysteresis; Experimental study; Preferred orientation; Binary alloys; Nanocomposites; Anisotropy; Reactive sputtering; Nanostructured materials; Transition element alloys
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2003.12.085

FePt–TiN nanocomposite films have been prepared on fused-quartz substrates by reactive sputtering and post-deposition thermal annealing. The effect of Fe/Pt ratio on the ordering transition behavior of FePt in such films was investigated. It was found that compared with the film with a nearly equiatomic Fe/Pt ratio, Pt-rich films tend to undergo ordering transition at lower temperature, and the ordered phase formed has a higher value of ordering parameter provided the films were annealed at the same temperature. In addition, for the Pt-rich films, with the formation of ordered FePt phase in the film, perpendicular anisotropy is developed even though there is no crystallographic preferred orientation for the FePt phase. We consider that fibrous grain structure may be formed in such FePt–TiN nanocomposite films, which contributes to the magnetization in the perpendicular direction.