|  |   |       e
 
 
 
  
 
 


" .."
4
1. M- BaFe12-xGaxO19 (0.1
2. - - La0.70 Sr0.30 MnO2.85
3. La0.70 Sr0.30 MnO2.85
4. Ba- Ln0.70Ba0.30MnO3-\delta (Ln = Pr, Nd)