Monday 23 February 2015

Spin ice with perpendicular anisotropy

Perpendicular Magnetization and Generic Realization of the Ising Model in Artificial Spin Ice.
Sheng Zhang, Jie Li, Ian Gilbert, Jason Bartell, Michael J. Erickson, Yu Pan, Paul E. Lammert, Cristiano Nisoli, K. K. Kohli, Rajiv Misra, Vincent H. Crespi, Nitin Samarth, C. Leighton, and Peter Schiffer Phys. Rev. Lett. 109, 087201 (2012)
SEM and MFM images of perpendicular moment nanomagnet arrays in kagome and honeycomb geometries with 600 nm lattice spacing. Each island in MFM shows either black or white, indicating that it consists of a single magnetic domain with moment pointing either up or down.

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