Spin–orbit torque-induced magnetization switching in electrochemically deposited CoPt oriented polycrystalline film

T Tongshuang Huang (Department of Electrical and Electronic Engineering, Institute of Science Tokyo 1 , 2-12-1 Ookayama, Meguro City, Tokyo 152-8552,) S Shinji Isogami (Research Center for Magnetic and Spintronic Materials, National Institute for Material Science 2 , 1-2-1 Sengen, Tsukuba City, Ibaraki 305-0047,) T Takanori Shirokura (Department of Electrical and Electronic Engineering, Institute of Science Tokyo 1 , 2-12-1 Ookayama, Meguro City, Tokyo 152-8552,) M Md. Mahmuldul Hasan (Research Organization for Nano and Life Innovation, Waseda University 4 , Shinjuku City, Tokyo 162-0041,) M Mikiko Saito (Research Organization for Nano and Life Innovation, Waseda University 4 , Shinjuku City, Tokyo 162-0041,) J Jun Uzuhashi (National Institute for Materials Science 3 , Tsukuba, Ibaraki 305-0047,) T Tadakatsu Ohkubo S Shinya Kasai (Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS) 2 , 1-2-1 Sengen, Tsukuba 305-0047,) S Shigeki Nakagawa (Department of Electrical and Electronic Engineering, Institute of Science Tokyo 1 , 2-12-1 Ookayama, Meguro City, Tokyo 152-8552,) Y Yota Takamura (Department of Electrical and Electronic Engineering, Institute of Science Tokyo 1 , 2-12-1 Ookayama, Meguro City, Tokyo 152-8552,)

Abstract

Current-induced spin–orbit torque (SOT) offers an efficient method of manipulating magnetization and is widely applied in emerging three-dimensional (3D) magnetic memory technologies. Electrochemical deposition presents a promising route for fabricating such 3D structures; yet, achieving high-quality magnetic films and spintronics phenomena remains challenging. Here, we demonstrate SOT in an electrochemically deposited 7.3 nm-thick CoPt thin film with strong perpendicular magnetic anisotropy, grown on a Pt seed layer, which serves as the spin source for this system. Accurate analysis of the SOT effective field using combined second-harmonic Hall measurements revealed the existence of SOT and its dependence on the magnetization angle. Furthermore, current-induced magnetization switching was achieved in a 2.8 nm-thick CoPt alloy film. This work unveils the potential of electrochemical deposition for next-generation 3D spintronics device applications.

Article Details

Volume / Issue Vol. 139, Issue 9
Published March 07, 2026
ISSN 0021-8979
Publisher American Institute of Physics

Journal Info

Journal of Applied Physics

American Institute of Physics

ISSN: 0021-8979 Physical Sciences

Authors (10)

T

Tongshuang Huang

Department of Electrical and Electronic Engineering, Institute of Science Tokyo 1 , 2-12-1 Ookayama, Meguro City, Tokyo 152-8552,

S

Shinji Isogami

Research Center for Magnetic and Spintronic Materials, National Institute for Material Science 2 , 1-2-1 Sengen, Tsukuba City, Ibaraki 305-0047,

T

Takanori Shirokura

Department of Electrical and Electronic Engineering, Institute of Science Tokyo 1 , 2-12-1 Ookayama, Meguro City, Tokyo 152-8552,

M

Md. Mahmuldul Hasan

Research Organization for Nano and Life Innovation, Waseda University 4 , Shinjuku City, Tokyo 162-0041,

M

Mikiko Saito

Research Organization for Nano and Life Innovation, Waseda University 4 , Shinjuku City, Tokyo 162-0041,

J

Jun Uzuhashi

National Institute for Materials Science 3 , Tsukuba, Ibaraki 305-0047,

T

Tadakatsu Ohkubo

S

Shinya Kasai

Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS) 2 , 1-2-1 Sengen, Tsukuba 305-0047,

S

Shigeki Nakagawa

Department of Electrical and Electronic Engineering, Institute of Science Tokyo 1 , 2-12-1 Ookayama, Meguro City, Tokyo 152-8552,

Y

Yota Takamura

Department of Electrical and Electronic Engineering, Institute of Science Tokyo 1 , 2-12-1 Ookayama, Meguro City, Tokyo 152-8552,