Study of visualization of nano-magnetic dynamics and the development of the experimental techniques using synchrotron radiation

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H02244
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: Japan Synchrotron Radiation Research Institute
• Principal Investigator: Nakamura Tetsuya 公益財団法人高輝度光科学研究センター, 利用研究促進部門, 主席研究員 (70311355)
• Co-Investigator(Kenkyū-buntansha): 小谷 佳範 公益財団法人高輝度光科学研究センター, 利用研究促進部門, 研究員 (10596464) ; 野村 光 大阪大学, 工学研究科, 助教 (20506258) ; 岡本 聡 東北大学, 多元物質科学研究所, 准教授 (10292278) ; 菊池 伸明 東北大学, 多元物質科学研究所, 助教 (80436170)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: Ｘ線磁気円二色性 / 放射光 / 軟Ｘ線 / スピントロニクス / STM

Outline of Final Research Achievements

We have studied the synchrotron X-ray magnetic circular dichroism (XMCD) measurement techniques using the nano-focused X-ray beam and the application to magnetic thins films. The time resolved XMCD signals have been successfully observed for the local area of about 100 nm in a Co/Pt multilayered film, where the applied magnetic fields were generated and synchronized with the pulsed X-rays. As a further advanced technical challenge, we have developed a scanning probe microscope (SPM) measurement technique combined with the synchrotron soft X-rays, which is so called SR-SPM. In the SR-SPM apparatus equipped with an X-ray focusing unit using a Fresnel zone plate, the higher density soft X-ray beam of about 1000 times compared to the previous studies irradiates the sample surface just below the SPM needle. XMCD signals from permalloy dots of the magnetite has been successfully recorded using the SR-SPM system with the special resolution of about 70 nm.

Free Research Field

放射光磁気解析