Surface Roughness and Magnetic Properties of Ni and Ni78Fe22 Thin Films on Polyethylene Naphthalate Organic Substrates

• Kaiju, Hideo

• Basheer, Nubla

• Kondo, Kenji

• Ishibashi, Akira

抄録

We have studied structural, electrical, and magnetic properties of Ni and Ni78Fe22 thin films evaporated on polyethylene naphtalate (PEN) organic substrates towards the fabrication of spin quantum cross (SQC) devices. As we have investigated the scaling properties on the surface roughness, the surface roughness of Ni (16 nm)/PEN is 0.34 nm, corresponding to 2 or 3 atomic layers, in the scanning scale of 16 nm, and the surface roughness of Ni78Fe22 (14 nm)/PEN is also as small as 0.25 nm, corresponding to less than 2 atomic layers, in the scanning scale of 14 nm. These facts denote that Ni/PEN and Ni78Fe22/PEN are suitable for magnetic electrodes on organic substrates used for SQC devices from the viewpoint of the surface morphology. Then, we have investigated magnetic hysteresis curve and magnetoresistance effects for Ni/PEN and Ni78Fe22/PEN. The squareness of the hysteresis loop is as small as 0.24 for Ni (25 nm)/PEN, where there is no observation of the anisotropy magnetoresistance (AMR) effect. In contrast, the squareness of the hysteresis loop is as large as 0.86 for Ni78Fe22 (26 nm)/PEN, where the AMR effect has been successfully obtained. These experimental results indicate that Ni78Fe22/PEN is a promising material for use in SQC devices from the viewpoint of not only the surface morphologies but also magnetic properties.

収録刊行物

• IEEE Transactions on Magnetics

  IEEE Transactions on Magnetics 46 (6), 1356-1359, 2010-06

  IEEE: Institute of Electrical and Electronics Engineers

キーワード

• Magnetic thin films
• polyethylene naphtalate organic substrates
• spin quantum cross devices
• vacuum evaporation

詳細情報

• CRID: 1050001202675016576
• NII論文ID: 120002169300
• HANDLE: 2115/43114
• ISSN: 00189464
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles