Nanosized pin of amorphous MoGe film introduced by EB lithography and vortex configuration

2017 Fiscal Year Final Research Report

• Project/Area Number: 26800192
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Osaka Prefecture University
• Principal Investigator: Ho Than Huy 大阪府立大学, 工学(系)研究科(研究院), 研究員 (40714382)
• Research Collaborator: ISHIDA Takekazu ; KATO Masaru ; HIDAKA Mutsuo ; MAEZAWA Masaaki ; HAYASHI Masahiko
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: SQUID顕微鏡 / 量子磁束 / 超伝導微小板 / Ginzburg-Landau 理論 / EBリソグラフィ

Outline of Final Research Achievements

In this work, we aim at introducing a pinning center into a small MoGe film. Regarding the Pacman-shaped plate, we conducted systematic studies on the vortex configuration both by experimental and theoretical methods. We discovered a novel arc-shaped configuration, and compared it with the shell model of the perfect disk. Regarding the method how to introduce the pinning center, we succeeded in fabricating a pin by ion milling method by Ar ions. The SQUID microscope observations of the vortex configurations on the Pacman plate, we compared our results with the Ginzburg-Landau calculations. We found good agreement between the two results. We also developed a SQUID sensor for the SQUID microscope, and succeeded in observing the vortex images on the MoGe films.

Free Research Field

物性物理学