1. S. Khizroev and D. Litvinov, Perpendicular Magnetic Recording (Kluwer, New York, 2004).
2. L. Neel, Ann. Geophys. (C.N.R.S.) 5, 99 (1949).
3. N. Eibagi, J. J. Kan, F. E. Spada, and E. E. Fullerton, IEEE Magn. Lett. 3(4), 500204 (2012).
4. E. Z. Meilikhov and R. M. Farzetdinova, J. Exp. Theor. Phys. 98(6), 1198 (2004).
5. C. A. Ross, Annu. Rev. Mater. Res. 31, 203 (2001).