LLG Simulations of TbFeCo/FeNiPt CGC-Like Film(Selected papers from MORIS 2006 Workshop on Thermal & Optical Magnetic Materials and Devices)

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概要

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• Recently, much attention has been focused on so-called "hybrid recording" such as "optically assisted magnetic recording" or "heat assisted magnetic recording". In other words, hybrid recording is expected to be a most promising storage device beyond 1 Tera bit/inch^2, ultra high density region. When the domain radius becomes very small in magneto optical recording film, the wall energy is dominant in the total energy of the domain, and then it will shrink and disappear. To write a very small domain, it is necessary to increase the domain wall coercivity to freeze the written domain. We perform three-dimensional Landau-Lifshitz-Gilbert (LLG) simulations for estimating domain shapes and wall structures in coupled granular and continuous (CGC) like films of TbFeCo film/FeNiPt grains. In the results, even when using lower Tc FeNiPt (Tc=307℃, Ku=1.8×10^7 [erg/cm^3] at room temperature) grains than FePt (Tc=497℃, Ku=7.0×10^7 [erg/cm^3] at room temperature) grains, we find a minute magnetic domain of 26nm diameter, could be made on TbFeCo /FeNiPt brlayer film. Moreover, the domain wall width, the obstacle in the minute magnetic domain structure of brlayer film, is narrow. This narrowness advantageously contributes to a high density recording.

• 2006-11-01

著者

• Motohashi M.

  Dep. Of Electronics Graduate School Of Nihon University

• Chino F.

  Dep. of Electronics and Computer Science, College of Science and Technology, Nihon University

• Itoh A.

  Dep. of Electronics and Computer Science, College of Science and Technology, Nihon University

• Tsukamoto A.

  Dep. of Electronics and Computer Science, College of Science and Technology, Nihon University

• Tsukamoto A.

  Dep. Of Electronics & Computer Science College Of Sci. & Tech. Nihon Univ.

• Chino F.

  Dep. of Computer Science, Graduate School of Sci. & Tech., Nihon Univ.

関連論文

• Domain Shape of CGC-like Films with Under Layer of Periodic Isolated FePt Particles(MORIS 2007 Workshop on Thermal & Optical Magneitc Materials and Devices)
• LLG Simulations of TbFeCo/FeNiPt CGC-Like Film(Selected papers from MORIS 2006 Workshop on Thermal & Optical Magnetic Materials and Devices)
• Double Layered Electrode for Plasmon Antenna(Selected papers from MORIS 2006 Workshop on Thermal & Optical Magnetic Materials and Devices)
• Preliminary Experiment for Near-field Optics with Transparent Slider in Hybrid Recording(Selected papers from MORIS 2006 Workshop on Thermal & Optical Magnetic Materials and Devices)

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