Development of novel RE-Fe-N soft magnetic materials for high frequency (10-100 MHz)

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04165
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21050:Electric and electronic materials-related
• Research Institution: Kyushu University (2022-2023); National Institute of Advanced Industrial Science and Technology (2021)
• Principal Investigator: Kon Tatsuya 九州大学, 工学研究院, 助教 (00780199)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 軟磁性材料 / Mhz帯高周波材料 / 希土類－鉄ー窒素

Outline of Final Research Achievements

In this study, 　novel soft magnetic materials　can be used in high-frequency device were investigated the synthesis of materials and their mechanisms. This is due to the fact that electronic devices are becoming more frequencies, and there are no soft magnetic materials available for high frequency. If materials that can be used at 10 to 100 MHz are put into practical use, they will be able to make a significant contribution to the miniaturization and performance of devices. In order to solve this problem, RE-Fe-N soft magnetic materials were synthesized and evaluated their magnetic properties. These
were fabricated alloy ingots by arc melting method, synthesized multiple materials by nitriding after pulverization, and evaluated their magnetic properties at high frequencies. The new material achieves a magnetic permeability of 10 or more at 10 MHz.

Free Research Field

冶金学

Academic Significance and Societal Importance of the Research Achievements

本研究は高周波で使用可能な軟磁性材料の開発を目指したものである。電子デバイスに用いられる軟磁性材料はコイルなどの部品に用いられる。現在10-100MHｚ領域で使用できる磁性材料が存在しないため、プラスチックを芯として用いている。プラスチックは透磁率１であり、もし透磁率が１０の材料ができた場合、コイルの大きさを１０分１にできる。本研究では、10MHzにおいて透磁率１０を超える材料の開発に成功し、また新たなメカニズムの高周波軟磁性材料の可能性を示した。