Investigation of giant magnetic anisotropy and coercivity in transition metal magnetic nano structures

2015 Fiscal Year Final Research Report

• Project/Area Number: 25287077
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Kyushu University
• Principal Investigator: NAKAGAWA TAKESHI 九州大学, 総合理工学研究科(研究院), 准教授 (80353431)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 表面 / 磁性 / 磁気異方性 / 磁気円二色性 / 走査トンネル顕微鏡 / 保磁力

Outline of Final Research Achievements

Magnetic anisotropy and coercivity are important physical properties for magnetic materials. We have investigated Co and Fe single layer nano structure on a heavy metal W surfaces in order to enhance magnetic anisotropy and coercivity. We have successfully prepared single atomic wires of Co and Fe on W(112) surface, which show 10~100 times larger magnetic anisotropy energies compared to those for bulk materials and have giant coercivity of ~3 T. We have revealed that even for common 3d transition metals, Co and Fe, precise control of their nano structures give rise to large magnetic anisotropy and coercivity.

Free Research Field

表面科学