کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1800831 | 1024546 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electronic, magnetic and transport properties of Co2TiZ (Z=Si, Ge and Sn): A first-principle study Electronic, magnetic and transport properties of Co2TiZ (Z=Si, Ge and Sn): A first-principle study](/preview/png/1800831.png)
We have studied the electronic structure, magnetic and transport properties of some Co based full Heusler alloys, namely Co2TiZ (Z=Si, Ge and Sn), in the frame work of first-principle calculations. The calculations show that Co2TiZ (X=Si, Ge and Sn) are to be half-metallic compounds with a magnetic moment of 2 μB, well consistent with the Slater–Pauling rule. The electronic structure results reveal that Co2TiZ has the high density of states at the Fermi energy in the majority-spin state and show 100% spin polarization. Our results also suggest that both the electronic and magnetic properties in these compounds are intrinsically related to the appearance of the minority-spin gap. The origin of energy gap in the minority-spin states is discussed in terms of the electron splitting of Z (Z=Si, Ge and Sn) and 3d Co atoms and also the d–d hybridization between the Co and Ti atoms. The transport properties of these materials are discussed on the basis of Seebeck coefficients, electrical conductivity coefficients and thermal conductivity coefficients.
Journal: Journal of Magnetism and Magnetic Materials - Volume 322, Issue 19, October 2010, Pages 2922–2928