scholarly journals Structural disorder and short-range order in full Heusler alloys Fe2VAl and Co2CrAl from first principles calculations

2020 ◽  
Vol 239 ◽  
pp. 122100 ◽  
Author(s):  
М.G. Kostenko ◽  
А.V. Lukoyanov
2021 ◽  
Vol 118 (13) ◽  
pp. e2020540118
Author(s):  
Flynn Walsh ◽  
Mark Asta ◽  
Robert O. Ritchie

The presence, nature, and impact of chemical short-range order in the multi-principal element alloy CrCoNi are all topics of current interest and debate. First-principles calculations reveal that its origins are fundamentally magnetic, involving repulsion between like-spin Co–Cr and Cr–Cr pairs that is complemented by the formation of a magnetically aligned sublattice of second-nearest-neighbor Cr atoms. Ordering models following these principles are found to predict otherwise anomalous experimental measurements concerning both magnetization and atomic volumes across a range of compositions. In addition to demonstrating the impact of magnetic interactions and resulting chemical rearrangement, the possible explanation of experiments would imply that short-range order of this type is far more prevalent than previously realized.


2019 ◽  
Vol 782 ◽  
pp. 1008-1014 ◽  
Author(s):  
I.G. Shmakov ◽  
O.I. Gorbatov ◽  
V.V. Serikov ◽  
N.M. Kleinerman ◽  
O.A. Golovnya ◽  
...  

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