Effect of Co-Fe substitution on room-temperature spin polarization in Co 3-x Fe x Si Heusler-compound films

  title={Effect of Co-Fe substitution on room-temperature spin polarization in Co 3-x Fe x Si Heusler-compound films},
  author={Kohei Tanikawa and Soichiro Oki and Shinya Yamada and Ko Mibu and Masanobu Miyao and Kohei Hamaya},
  journal={Physical Review B},
Using low-temperature molecular beam epitaxy, we study substitutions of Fe atoms for Co ones in Co_3-xFe_xSi Heusler-compound films grown on Si and Ge. Even for the low-temperature grown Heusler-compound films, the Co-Fe atomic substitution at A and C sites can be confirmed by the conversion electron M"ossbauer spectroscopy measurements. As a result, the magnetic moment and room-temperature spin polarization estimated by nonlocal spin-valve measurements are systematically changed with the Co-Fe… 

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