發送短信 : Domain wall memory: physics, materials, and devices

 _____      _____     ____     _    _      _____  
|  __ \\   |  ___||  |  _ \\  | || | ||   / ___// 
| |  \ ||  | ||__    | |_| || | || | ||   \___ \\ 
| |__/ ||  | ||__    | .  //  | \\_/ ||   /    // 
|_____//   |_____||  |_|\_\\   \____//   /____//  
 -----`    `-----`   `-` --`    `---`   `-----`