# High spin polarization in the ferromagnetic filled skutterudites KFe4Sb12 and NaFe4Sb12

@article{Sheet2005HighSP,
title={High spin polarization in the ferromagnetic filled skutterudites KFe4Sb12 and NaFe4Sb12},
author={Goutam Sheet and Helge Rosner and Steffen Wirth and Andreas Leithe-Jasper and Walter Schnelle and Ulrich Burkhardt and J A Mydosh and Pratap Raychaudhuri and Yuri Grin},
journal={Physical Review B},
year={2005},
volume={72},
pages={180407-1-180407-4}
}
• Published 27 October 2005
• Materials Science, Physics
• Physical Review B
The spin polarization of ferromagnetic alkali-metal iron antimonides $\mathrm{K}{\mathrm{Fe}}_{4}{\mathrm{Sb}}_{12}$ and $\mathrm{Na}{\mathrm{Fe}}_{4}{\mathrm{Sb}}_{12}$ is studied by point-contact Andreev reflection using superconducting Nb and Pb tips. From these measurements an intrinsic transport spin polarization ${P}_{t}$ 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…
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