Wang, K., Martin, K.N., Morrison, C.G., Ward, R.C.C., Bowden, G.J. and de Groot, P.A.J.
Engineering coercivity in YFe2 dominated DyFe2/YFe2 superlattice by patterning
Applied Physics A: Materials Science & Processing, 86, (3), . (doi:10.1007/s00339-006-3791-x).
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Single crystal 400 nm thick Laves phase [20 Å?DyFe2/80 Å?YFe2]40 superlattice have been grown by MBE with a (110) growth direction. VSM measurements performed at room temperature with an applied field range of ±1.2×105 Oe, directed along the  direction, reveal a unique single-phase-liked ferrimagnetic behavior. A dominant exchange spring behavior is revealed by MOKE measurement along the [–110] direction. Furthermore, for striped arrays patterned along the  direction with height-to-width ratio of 0.05, a shape anisotropy of the order of 104 erg/cm3 is induced, resulting into a pronounced change of coercivity due to the comparable magnitude with intrinsic anisotropies. The results demonstrate the feasibility of engineering both single-phase-liked and exchange-spring magnet behavior in Laves phase epitaxial hard/soft superlattices by patterning.
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