Measurements and applications of dynamic magnetic susceptibility

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03718
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Doshisha University (2017); Kochi University (2015-2016)
• Principal Investigator: Kodama Kazuto 同志社大学, 研究開発推進機構, 嘱託研究員 (00153560)
• Co-Investigator(Kenkyū-buntansha): 山本 裕二 高知大学, 教育研究部自然科学系理学部門, 教授 (00452699) ; 齋藤 武士 信州大学, 学術研究院理学系, 准教授 (80402767)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 環境磁気 / 磁性ナノ粒子 / 磁化率

Outline of Final Research Achievements

This study consists of developing instrumentation to investigate the dynamic magnetization process of magnetic nano-particles and a series of experiments using such new instrumentation in both time domain and frequency domain. In the time domain, we measured free decay of magnetization induced by a pulse magnetic field. Based on linear transformation theory, such time-domain data can be transformed to those in the frequency domain from which broad-band frequency spectrum can result. Moreover, such measurements in the pulse magnetic field was found to be a rapid and easy-to-use method for the determination of magnetic hysteresis instead of the conventional method with VSM that is usually quite time-consuming.

Free Research Field

岩石磁気学