Ferromagnetic Contacts to InSb nanowires

InSb nanowires are versatile platforms for a variety of quantum transport experiments. Here we develop ferromagnetic contacts onto InSb nanowires. We fabricate four terminal devices (spin-valve geometry) using both Ti/Au and CoFe contacts. At low temperature, both local and non-local experiments demonstrate hysteretic spin-valve like signals. Besides spin injection, we are considering other explanations, for example, the magneto-Coulomb effect. In addition, magnetized ferromagnetic contacts themselves create local magnetic fields, which may affect conductance in high g-factor InSb nanowires.