Origin of ferromagnetism at heterointerfaces with charge transfer studied by depth profiling methods using synchrotron-radiation spectroscopy

2017 Fiscal Year Final Research Report

• Project/Area Number: 16H07442
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Kitamura Miho 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 博士研究員 (00783581)
• Project Period (FY): 2016-08-26 – 2018-03-31
• Keywords: 界面磁性 / 酸化物 / 表面・界面 / X線吸収分光 / X線磁気二色性 / 放射光

Outline of Final Research Achievements

To investigate the relationship between the charge distribution and　ferromagnetism at the heterointerface between perovskite transition metal oxides, we have evaluated magnetic depth profiles using x-ray magnetic circular dichroism measurements of various heterostructures with different stack-order and thicknesses. We have found that not only the occurrence of the charge transfer but also the charge spreading are the keys to emergence of the novel ferromagnetism at heterointerfaces.

Free Research Field

放射光分光に基づく酸化物物性評価