Magnetic Properties of Single-Layered Fe_100-xPt_x Films by Rapid Thermal Annealing

Abstract:

Fe100-xPtx single-layered films with Pt contents (x) = 32~69 at.% were deposited on natural-oxidized Si(100) substrate by dc magnetron sputtering. Then the films were post-annealed at 700 °C for 3 min by a rapid thermal annealing (RTA) with a high heating ramp rate of 100 °C/sec. Experimental results show that FePt film presented (111) preferred orientation and tended to in-plane magnetic anisotropy as the content of Pt was 32 at.%. When the Pt content was increased to 55 at.%, (001)-textured FePt film was obtained and presented perpendicular magnetic anisotropy. Its out-of-plane coercivity (Hc⊥), saturation magnetization (Ms) and out-of-plane squareness (S⊥) reached to 12.7 kOe, 375 emu/cm3 and 0.8, respectively. These results reveal its significant potential as perpendicular magnetic recording media for high-density recording. Further increasing the Pt content to 69 at.%, the coercivity of FePt film was decreased drastically to below 1 kOe and tended towards in-plane magnetic anisotropy.

• Periodical: Advanced Materials Research (Volumes 123-125)
• Pages: 723-726
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.123-125.723
• Online since: August 2010
• Authors: Chih Long Shen, T.H. Sun, C.L. Chang, Sheng Chi Chen, G.P. Lin, K.T. Huang, Sin Liang Ou, Po Cheng Kuo
• Keywords: Magnetic Property, Rapid Thermal Annealing (RTA), Single-Layered Fe_110-xPt_X Films

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