發送短信 : Micromagnetics of derivative ring-shaped nanomagnets

 _____      ______              _____     ____    
|  __ \\   /_   _//     ___    |  ___||  |  _ \\  
| |  \ ||   -| ||-     /   ||  | ||__    | |_| || 
| |__/ ||   _| ||_    | [] ||  | ||__    | .  //  
|_____//   /_____//    \__ ||  |_____||  |_|\_\\  
 -----`    `-----`      -|_||  `-----`   `-` --`  
                         `-`