Establishment of technology to control local magnetic properties and its measurement method and its application to functional thin-film magnetic devices

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02147
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 21030:Measurement engineering-related
• Research Institution: Iwate University
• Principal Investigator: Kikuchi Hiroaki 岩手大学, 理工学部, 准教授 (30344617)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 磁気異方性 / 磁気薄膜 / 局所制御 / 磁気デバイス

Outline of Final Research Achievements

The applicability of Joule heating by applying a local electric current to magnetic thin films was investigated to clarify the possibility of controlling temperature. Then, by combining the local magnetic saturation technique, which combines the local magnetic field generated by the current applied for Joule heating and the magnetic field by permanent magnets, it was clarified that the magnetic anisotropy can be controlled in the local region is possible. Based on this technique, we examined a simple magnetic anisotropy control technique using thin-film magnetic impedance elements as an example and successfully performed.

Free Research Field

磁気応用工学

Academic Significance and Societal Importance of the Research Achievements

薄膜磁気デバイスにおける磁気異方性の制御は, 成膜時あるいは, 基板上で一方向の制御に限られていたが, 本研究成果は装置構造の工夫により任意の方向に異方性を付与できることを示したものであり, 磁気デバイス作製法に新たな可能性を与える。また, 一方向に制御の場合においては, 高真空で大電力を消費し, 長時間で大型炉を必要としたのに対して, 本成果はコンパクトなポータブルな装置提供を可能にし, 消費電力も極めて少なくて済み, 工業応用上インパクトのある成果である。