Effect of Ru Underlayer on Magnetic Properties of High $B_{\text{s}}$-Fe70Co30 Films

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概要

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• We have investigated the effect of a Ru underlayer on the magnetic properties and film structures of Fe70Co30 films. A 0.7-nm-thick Ru underlayer contributes to the decrease in coercivity to 2–3 Oe in Fe–Co films. A 200-nm-thick Fe–Co film with a Ru underlayer exhibits a good $\mu$–$f$ response, that is, the real part of permeability $\mu'$ remains constant up to 3 GHz. The reasons for achieving soft magnetic properties are presumably the fine and uniform grain structures, and the increasing crystal orientation of bcc(211) or the decreasing crystal orientation of bcc(110). By applying a Ru/Fe–Co layer to the pole tip materials of write heads, further improvement in write performance can be expected.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2004-10-15

著者

• Uehara Yuji

  Magnetic Component Division Storage Products Group Fujitsu Ltd.

• Miyajima Toyoo

  Magnetic Component Division Storage Products Group Fujitsu Ltd.

• Miura Yoshimasa

  Electrical & Electronic Engineering Shinshu University

• KUBOMIYA Takayuki

  Magnetic Component Division, Storage Products Group, Fujitsu Ltd.

• IKEDA Shoji

  Research Institute of Electrical Communication, Tohoku University

• Ikeda Shoji

  Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

• Miura Yoshimasa

  Electrical & Electronic Engineering Shinshu University, 4-7-1 Wakasato, Nagano 380-8553, Japan

• Kubomiya Takayuki

  Magnetic Component Division, Storage Products Group, Fujitsu Ltd., 36 Kita-Owaribe, Nagano 381-8501, Japan

関連論文

• Effect of Ru Underlayer on Magnetic Properties of High B_s-Fe_Co_ Films
• Dependence of Magnetic Properties on Sputtering Pressure for Fe–Al–O Alloy Films Made by Carousel-Type Sputtering
• Effect of Ru Underlayer on Magnetic Properties of High $B_{\text{s}}$-Fe70Co30 Films

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