annealing time increase
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2014 ◽  
Vol 513-517 ◽  
pp. 48-50
Author(s):  
Gang Cheng ◽  
Yi Zhe Sun ◽  
Kuang Pan ◽  
Lin Li ◽  
Lei Ma ◽  
...  

A series of Fe-Pt based alloy films were deposited on glass substrates by DC magnetron sputtering. It is found that the Fe3Pt and FePt3 phases appear in Dy-addition films at first and then a composition reaction Fe3Pt + FePt3 FePt occurs at 500°C as annealing time increase. It suggested that Dy element can restrain the fct phase forming but help to form Fe3Pt and FePt3 phases. Coercivity and remanence ratio of DyxFe50-xPt50 alloy films annealed at 500°C for 200 h achieve the maximum 11kOe and 0.89 as x =1.5, respectively.



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