公开(公告)号：US10937949B1

公开(公告)日：2021-03-02

申请号：US16654647

申请日：2019-10-16

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Kyoung-Woong Moon ,  Chan Yong Hwang

IPC: H01L43/08 ,  H01L43/04

Abstract: Disclosed is a method of forming a doughnut-shaped skyrmion, the method including heating a local area of a vertical magnetic thin film magnetized in a first direction, which is any one of an upward direction and a downward direction, applying a magnetic field having a second direction, which is opposite the first direction, and having intensity higher than coercive force of the vertical magnetic thin film to the vertical magnetic thin film to form a first area magnetized in the second direction, applying a magnetic field having the second direction to the vertical magnetic thin film to form a second area, which is an extension of the first area, and applying a magnetic field having the first direction to the vertical magnetic thin film to form a third area magnetized in the first direction in the second area.

公开(公告)号：US11193988B2

公开(公告)日：2021-12-07

申请号：US16687213

申请日：2019-11-18

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE ,  KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  KOREA BASIC SCIENCE INSTITUTE

Inventor： Kyoung-Woong Moon ,  Chan Yong Hwang ,  Byoung-Chul Min ,  Seung-young Park

IPC: G01R33/05 ,  H01F10/30 ,  G01R33/12 ,  G01R33/00 ,  G01R33/032 ,  H01F10/32

Abstract: Provided is a method of measuring a magnitude of magnetization of a perpendicular magnetic thin film, including: forming a stripe pattern in which a first magnetic domain that extends in a y direction and is magnetized in a z direction and a second magnetic domain that extends in the y direction and is magnetized in a direction opposite to the z direction are arranged alternately in an x direction, in a perpendicular magnetic thin film that extends in an xy plane; changing widths in the x direction, of the first and second magnetic domains by applying a magnetic field having a predetermined magnitude, in the z direction, to the perpendicular magnetic thin film; and calculating an absolute value of the magnetization of the perpendicular magnetic thin film on the basis of a ratio between the widths in the x direction, of the first magnetic domain and the second magnetic domain.

公开(公告)号：US20210050509A1

公开(公告)日：2021-02-18

申请号：US16654647

申请日：2019-10-16

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Kyoung-Woong Moon ,  Chan Yong Hwang

IPC: H01L43/08

Abstract: Disclosed is a method of forming a doughnut-shaped skyrmion, the method including heating a local area of a vertical magnetic thin film magnetized in a first direction, which is any one of an upward direction and a downward direction, applying a magnetic field having a second direction, which is opposite the first direction, and having intensity higher than coercive force of the vertical magnetic thin film to the vertical magnetic thin film to form a first area magnetized in the second direction, applying a magnetic field having the second direction to the vertical magnetic thin film to form a second area, which is an extension of the first area, and applying a magnetic field having the first direction to the vertical magnetic thin film to form a third area magnetized in the first direction in the second area.