Characterization of spin valve films exchange biased by Co/Ru/Co synthetic antiferromagnets prepared on 4 degree tilt-cut Si(111) wafer

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概要

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• Spin valves exchange biased by a Co/Ru/Co [ Ru/Co/Cu/Co/Ru/Co/Cu/Si Substrate ] were fabricated on 4 degree tilt-cut Si (111) substrate by RF magnetron sputtering method. When a Cu (50 A) underlayer was deposited prior to the formation of the spin valves, Co/Ru/Co and Co layers constituting spin valves have been developed uniaxial magnetic anisotropy in the direction of Si <112>. In case of a Co/Ru/Co with the same thickness of Co[synthetic antiferromagnet], spin valves with a 25 A Cu spacer have showed giant-magnetoresistance ratio above 5 % until the external magnetic field overcame the crystal anisotropy field originated from tilt-cut Si substrate. When arrived at critical field, Co/Ru/Co has displayed spin flopping phenomena as in the antiferromagnetic material. In making the thickness of Co in a Co/Ru/Co different[synthetic ferrimagnet], above spin flopping phenomena have disappeared. Instead, thinner Co layer has first reversed its magnetization and keeped the antiparallel state with the thicker Co layer.

• 社団法人電子情報通信学会の論文
• 1999-11-10

著者

• Cho K‐k

  School Of Materials Science And Engineering Seoul National University

• Joo S‐k

  Seoul National Univ. Seoul Kor

• Joo Seung-ki

  School Of Material Science And Engineering Seoul-national University

• Joo Seung-ki

  Division Of Materials Science And Engineering College Of Engineering Seoul National University

• Joo Seung-ki

  Division Of Materials Science And Engineering Seoul National Univ.

• Cho Kwon-ku

  School Of Materials Science And Engineering Seoul National University

• Jeong Won-cheol

  Division Of Materials Science And Engineering Seoul National University

• JEONG Won-Cheol

  School of Materials Science and Engineering, Seoul National University

• Joo Seung-ki

  School Of Materials Science And Engineering College Of Enginering Seoul National University

• Joo Seung-Ki

  School of Materials Science and Engineering, College of Enginering, Seoul National University

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