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Effect of Mn doping on the magnetic properties of the post-annealed Fe48Pt52-C composite films

✍ Scribed by Mi, W. B. ;Jin, J. ;Bai, H. L.

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
978 KB
Volume
208
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

(Fe~48~Pt~52~)~1–x~Mn~x~‐C composite films with different x were fabricated using magnetron sputtering and post‐annealing at 550 °C. Proper Mn doping can improve the ordering of the face‐centered tetragonal (fct) FePt grains. The lattice constant ratio (c/a) first decreases, then increases with the increasing x. At x = 2.1%, the minimum c/a of 0.964 and the maximum ordering degree of 0.96 were obtained. All of the films are hard ferromagnetic. The maximum room‐temperature coercivity of the films is 7.5 kOe at x = 2.1% and 10‐kOe field, and the coercivity decreases from 13.3 kOe at 20 K to 10.1 kOe at 300 K under a 90‐kOe field. The reversal mechanism of the films is the coexistence of the domain wall motion and Stoner–Wolhfarth (S‐W) rotation modes.

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Enhanced magnetic properties of annealed
Enhanced magnetic properties of annealed Fe48Pt52C composite films by N incorporation
✍ Mi, W. B. ;Jin, J. ;Bai, H. L. 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 769 KB

## Abstract N‐incorporated Fe~48~Pt~52~C composite films were fabricated using a reactive facing‐target sputtering system in a mixture of Ar and N~2~ gases, and annealed in a chamber with the vacuum of 10^−6^ Pa. Upon annealing, the escape of N atoms improves the ordering of the face‐centered tetr