This title appears in the Scientific Report :
2008
Please use the identifier:
http://hdl.handle.net/2128/11085 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.77.214417 in citations.
Magnetic phase transition in half-metallic CoMnSb and NiMnSb semi-Heusler alloys upon Cu doping: First-principles calculations
Magnetic phase transition in half-metallic CoMnSb and NiMnSb semi-Heusler alloys upon Cu doping: First-principles calculations
We study the effect of the nonmagnetic 3d atoms on the magnetic properties of the half-metallic (HM) semi-Heusler alloys Co1-xCuxMnSb and Ni1-xCuxMnSb (0 <= x <= 1) using first-principles calculations. We determine the magnetic phase diagram of both systems at zero temperature and obtain a pha...
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Personal Name(s): | Galanakis, I. |
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Sasioglu, E. / Özdogan, K. | |
Contributing Institute: |
Quanten-Theorie der Materialien; IFF-1 Quanten-Theorie der Materialien; IAS-1 |
Published in: | Physical Review B Physical review / B, 77 77 (2008 2008) 21 21, S. 214417 214417 |
Imprint: |
College Park, Md.
APS
2008
|
Physical Description: |
214417 |
DOI: |
10.1103/PhysRevB.77.214417 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Physical Review B
77 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.77.214417 in citations.
We study the effect of the nonmagnetic 3d atoms on the magnetic properties of the half-metallic (HM) semi-Heusler alloys Co1-xCuxMnSb and Ni1-xCuxMnSb (0 <= x <= 1) using first-principles calculations. We determine the magnetic phase diagram of both systems at zero temperature and obtain a phase transition from a ferromagnetic to an antiferromagnetic state. For low Cu concentrations the ferromagnetic Ruderman-Kittel-Kasuya-Yosida (RKKY)-type exchange mechanism dominates, while the antiferromagnetic superexchange coupling becomes important for larger Cu content. A strong dependence of the magnetism in both systems on the position of the Fermi level within the HM gap is found. Obtained results are in good agreement with the available experimental data. |