Sheet, Goutam ; Rosner, H. ; Wirth, S. ; Leithe-Jasper, A. ; Schnelle, W. ; Burkhardt, U. ; Mydosh, J. A. ; Raychaudhuri, P. ; Grin, Yu. (2005) High spin polarization in the ferromagnetic filled skutterudites KFe4Sb12 and NaFe4Sb12 Physical Review B, 72 (18). Article ID 180407(R). ISSN 1098-0121
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Official URL: https://journals.aps.org/prb/abstract/10.1103/Phys...
Related URL: http://dx.doi.org/10.1103/PhysRevB.72.180407
Abstract
The spin polarization of ferromagnetic alkali-metal iron antimonides KFe4Sb12 and NaFe4Sb12 is studied by point-contact Andreev reflection using superconducting Nb and Pb tips. From these measurements an intrinsic transport spin polarization Pt of 67% and 60% for the K and Na compound, respectively, is inferred, which establishes these materials as a class of highly spin-polarized ferromagnets. The results are in accord with band structure calculations within the local spin density approximation that predict nearly 100% spin polarization in the density of states. We discuss the impact of calculated Fermi velocities and spin fluctuations on Pt.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 105125 |
| Deposited On: | 25 Dec 2017 11:48 |
| Last Modified: | 25 Dec 2017 11:48 |
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