%0 Journal Article %1 Chaudhary_2023 %A Chaudhary, Vikrant %A Singh, Sapna %A Gujjar, Deepak %A Nautiyal, Tashi %A Maitra, Tulika %A van den Brink, Jeroen %A Kandpal, Hem C %D 2023 %I IOP Publishing %J J. Phys. Condens. Matter. %K a b %N 28 %P 285502 %R 10.1088/1361-648X/accc68 %T Spin and current transport in the robust half-metallic magnet c-CoFeGe %U https://dx.doi.org/10.1088/1361-648X/accc68 %V 35 %X Spintronics is an emerging form of electronics based on the electrons’ spin degree of freedom for which materials with robust half-metallic ferromagnet character are very attractive. Here we determine the structural stability, electronic, magnetic, and mechanical properties of the half-Heusler (hH) compound CoFeGe, in particular also in its cubic form. The first-principles calculations suggest that the electronic structure is robust with 100% spin polarization at the Fermi level under hydrostatic pressure and uni-axial strain. Both the longitudinal and Hall current polarization are calculated and the longitudinal current polarization () is found to be and extremely robust under uniform pressure and uni-axial strain. The anomalous Hall conductivity and spin Hall conductivity of hH cubic CoFeGe (c-CoFeGe) are found to be S cm−1 and S cm−1, respectively. Moreover, the Curie temperature of the alloy is calculated to be ∼524 K with a 3 magnetic moment. Lastly, the calculated mechanical properties indicate that c-CoFeGe is ductile and mechanically stable with a bulk modulus of ≈154 GPa. Overall, this analysis reveals that cubic CoFeGe is a robust half-metallic ferromagnet and an interesting material for spintronic applications.

@article{Chaudhary_2023, abstract = {Spintronics is an emerging form of electronics based on the electrons’ spin degree of freedom for which materials with robust half-metallic ferromagnet character are very attractive. Here we determine the structural stability, electronic, magnetic, and mechanical properties of the half-Heusler (hH) compound CoFeGe, in particular also in its cubic form. The first-principles calculations suggest that the electronic structure is robust with 100% spin polarization at the Fermi level under hydrostatic pressure and uni-axial strain. Both the longitudinal and Hall current polarization are calculated and the longitudinal current polarization () is found to be and extremely robust under uniform pressure and uni-axial strain. The anomalous Hall conductivity and spin Hall conductivity of hH cubic CoFeGe (c-CoFeGe) are found to be S cm−1 and S cm−1, respectively. Moreover, the Curie temperature of the alloy is calculated to be ∼524 K with a 3 magnetic moment. Lastly, the calculated mechanical properties indicate that c-CoFeGe is ductile and mechanically stable with a bulk modulus of ≈154 GPa. Overall, this analysis reveals that cubic CoFeGe is a robust half-metallic ferromagnet and an interesting material for spintronic applications.}, added-at = {2023-11-22T18:29:33.000+0100}, author = {Chaudhary, Vikrant and Singh, Sapna and Gujjar, Deepak and Nautiyal, Tashi and Maitra, Tulika and van den Brink, Jeroen and Kandpal, Hem C}, biburl = {https://www.bibsonomy.org/bibtex/2f66e16002f05e162b845e593a3169f97/ctqmat}, day = 20, doi = {10.1088/1361-648X/accc68}, interhash = {626fed12b94d2fb96e5cc8503751e4d7}, intrahash = {f66e16002f05e162b845e593a3169f97}, journal = {J. Phys. Condens. Matter.}, keywords = {a b}, month = {04}, number = 28, pages = 285502, publisher = {IOP Publishing}, timestamp = {2023-11-22T18:29:33.000+0100}, title = {Spin and current transport in the robust half-metallic magnet c-CoFeGe}, url = {https://dx.doi.org/10.1088/1361-648X/accc68}, volume = 35, year = 2023 }