Magnetic surface states in high polarization materials

Ning Wu; Peter A. Dowben

doi:10.1117/12.891268

15 September 2011 Magnetic surface states in high polarization materials

Ning Wu, Peter A. Dowben

Proceedings Volume 8100, Spintronics IV; 81000T (2011) https://doi.org/10.1117/12.891268
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

Surfaces are often different materials, and typically have a different electronic structure from the bulk and since the dawn of surface science, surface-localized electronic states, surface states, have been extensively studied and investigated with growing accuracy. Of particular importance to spintronics are magnetic surface states. Interfaces will play a very important role in many spintronics devices, yet the interface properties are often ignored, poorly understood or badly characterized. For many nominally half metal materials, materials that in some ground state calculations exhibit 100% spin polarization, the magnetic surface states may significantly reduce the effective spin polarization. We review the magnetic surface states of several well known and often highly touted high spin polarized materials such as NiMnSb, Fe₃O₄, CoS₂ and CrO₂. Finally, we summarize surface state measurements of magnetoelectric antiferromagnets Cr₂O₃, which has electrically controllable net surface spins, a major complication to the study of CrO₂ by photoemission.

Citation Download Citation

Ning Wu and Peter A. Dowben "Magnetic surface states in high polarization materials", Proc. SPIE 8100, Spintronics IV, 81000T (15 September 2011); https://doi.org/10.1117/12.891268

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