Study of magnetization switching process of perpendicular magnetization film with high squareness ratio

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K04658
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied materials
• Research Institution: National Institutes for Quantum and Radiological Science and Technology (2016-2017); Japan Atomic Energy Agency (2015)
• Principal Investigator: AGUI Akane 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 放射光科学研究センター, 上席研究員(定常) (20360406)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: コンプトン散乱 / 垂直磁化膜 / 磁化過程

Outline of Final Research Achievements

A rare earth-transition metal amorphous alloy film is a system known as a material of a magnetic recording material. In this study, the spin and orbital specified magnetization curves, and as well as, element specified magnetization curves of Tb x Co 100 - x films were measured by combing total magnetization curve measurement and magnetic Compton scattering measurement. The spin magnetic moment, the orbital magnetic moment, the Tb magnetic moment and the Co magnetic moment direction are reversed with the magnetic compensation composition around x=17. Since the 4f orbital of rare earth Tb is dominant and the system with large spin orbital interaction is used in the system used in this study, the ratio of spin to orbit, the ratio of Tb and Co is nearly constant. It is consistent with the theory of rectangular exchange interaction.

Free Research Field

分光物性