Text this: A review on organic spintronic materials and devices: II. Magnetoresistance in organic spin valves and spin organic light emitting diodes

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