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Asymmetric domain nucleation and unusual magnetization reversal in ultrathin Co films with perpendicular anisotropy

Iunin, Y. L.; Kabanov, Y. P.; Nikitenko, V.I.; Cheng, X.M.; Clarke, D.; Tretiakov, O. A.; Tchernyshyov, O.; Shapiro, A. J.; Shull, R. D.; Chien, C.L. (American Physical Society, 2007-03-16)

We report unexpected phenomena during magnetization reversal in ultrathin Co films and Co/Pt multilayers with perpendicular anisotropy. Using magneto-optical Kerr microscopy and magnetic force microscopy we have observed ...

Magnetic properties of one-dimensional quasiperiodic Co/Pt multilayers

Zhu, L.Y.; Cheng, X.M.; Chien, C.-L. (American Institute of Physics, 2006-04-15)

We have fabricated Fibonacci [Co/Pt] multilayers with two constituent Co/Pt bilayers, as well as periodic multilayers of the same Co/Pt bilayers, all of which exhibit perpendicular magnetic anisotropy. Magnetic properties ...

Magnetic core loss of ultrahigh strength FeCo alloys

Cheng, X.M.; Zhang, X.K.; Zhang, D.Z.; Lee, S.H.; Duckham, A.; Weihs, T. P.; Cammarata, R.C.; Chien, C.-L. (American Institute of Physics, 2003-05-15)

Hiperco® 50 alloy heat treated between 450 and 650°C exhibits superior mechanical properties. We report the measurements of the ac core loss at various frequencies up to 4500 Hz of the Hiperco® 50 alloy samples annealed ...

Magnetic properties of epitaxial Mn-doped ZnO thin films

Cheng, X.M.; Chien, C.-L. (American Institute of Physics, 2003-05-15)

Epitaxial ZnO thin films doped with 7% Mn have been made by reactive rf magnetron sputtering onto (112_0) sapphire substrates at 400°C. X-ray diffraction measurements reveal that the Zn0.93Mn0.07O film has a (0001) wurtzite ...