Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 9: Magnetic Nanoparticles

MA 9.11: Vortrag

Montag, 31. März 2014, 17:45–18:00, HSZ 401

Structural and magnetic properties of SBA-15 assisted Heusler nanowires and nanoparticles — •Changhai Wang, Jinfeng Qian, Paul Simon, Gerhard Fecher, and Claudia Felser — Max-Planck-Institut für Chemische Physik fester Stoffe

We report the first preparation of Heusler nanowires and nanoparticles with examples of Co2FeGa and Co2NiGa using SBA-15 silica as the templates. Structural probes using XRD and XAFS confirm the formation of L21 Co2FeGa Heusler phase. Magnetic dipole stray fields are observed for isolated Co2FeGa nanowires indicating multiple magnetic domains. The magnetic inductions of selected Co2FeGa nanowires are evaluated by the magnetic phase shift giving rise to intrinsic magnetic induction magnitude lying in the range   1.1 T. The particle size of Co2NiGa Heusler nanoparticles significantly affect their phase transition and magnetic properties. The scientific and technical implications of Heusler nanowires and nanoparticles in application fields such as spintronics and magnetic shape memory alloys are also discussed.