Magnetic domain wall moving element and magnetic array

US12369498B2 · kind B2 · utility

Assignee

• TDK CORPORATION · JP

Inventors

• Shogo Yonemura · Tokyo, JP
• Tatsuo Shibata · Tokyo, JP
• Shogo Yamada · Tokyo, JP

Key dates

• Filing date: Aug 30, 2022
• Grant date: Jul 22, 2025
• Expiry date: Mar 2, 2044

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N50/85

Abstract

A magnetic domain wall moving element includes a first ferromagnetic layer, non-magnetic layer, second ferromagnetic layer, first magnetization fixed part, second magnetization fixed part, first surface layer and second surface layer. The first and second ferromagnetic layer sandwich the non-magnetic layer, the second ferromagnetic layer has a region having a magnetic domain wall formed therein, the first magnetization fixed part contacts second ferromagnetic layer, the second magnetization fixed part contacts second ferromagnetic layer at a position different from that of the first magnetization fixed part, the first is thicker than the second magnetization fixed part, the first surface layer contacts the first magnetization fixed part's first surface, the second surface layer contacts the second magnetization fixed part's first surface, and a constituent atom of a portion of the first surface layer in contact with the first magnetization fixed part are different from a constituent atom of the second surface layer.