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First-principle investigation of the d 0 half-metallic properties in full-Heusler compounds CsAX2 (A = Mg, Ca, Sr, and Ba; X = N, and O)

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Abstract

Based on the density functional theory within the generalized-gradient approximation, the electronic structure and magnetic properties of CsAX2 (A = Mg, Ca, Sr, and Ba; X = N, and O) full- Heusler compounds have been studied. The spin-polarized calculations show that CsAN2/CsAO2 are newly designed d 0 half-metals with an integer magnetic moment of 3 μ B /1 μ B in their ferrimagnetic ground states. Importantly, the strong spin-polarization of the p states of N and O atoms is found to be the origin of the magnetic moment and the half-metallicity. Also, the half-metallic gaps of CsAX2 are quite large, thus, the half-metallicity is robust against lattice distortion.

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Gao, Y.C., Wang, X.T. First-principle investigation of the d 0 half-metallic properties in full-Heusler compounds CsAX2 (A = Mg, Ca, Sr, and Ba; X = N, and O). Journal of the Korean Physical Society 66, 1160–1166 (2015). https://doi.org/10.3938/jkps.66.1160

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