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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 ...

Longitudinal and perpendicular exchange bias in FeMn/(FeNi/FeMn)n multilayers

Sun, L.; Zhou, S.M.; Searson, P.C.; Chien, C.-L. (American Institute of Physics, 2003-05-15)

Exchange bias in ferromagnetic (FM)/antiferromagnetic (AF) bilayers is usually investigated in the longitudinal configuration with the exchange coupling established in the film plane. In this work, we report on the ...

Stripes in thin ferromagnetic films with out-of-plane anisotropy

Clarke, D.; Tretiakov, O.A.; Tchernyshyov, O. (American Physical Society, 2007-05-01)

We examine the T=0 phase diagram of a thin ferromagnetic film with a strong out-of-plane anisotropy (e.g., Co/Pt multilayers) in the vicinity of the reorientation phase transition. The phase diagram in the anisotropy-applied-field ...

Memory effects of exchange coupling in CoO/Ni81Fe19 bilayers

Gokemeijer, N.J.; Chien, C.-L. (American Institute of Physics, 1999-04-15)

By changing the field-cooling procedure, the value and even the sign of the exchange field HE in CoO/Ni81Fe19 bilayers can be greatly altered. The value of HE can be made to vanish at any temperature below TN. We also show ...

Comparison of surface spin wave modes at Fe/MnF2 and Fe/Mn interfaces

Siu, I.L.; Islam, M.N.; Walker, J.C. (American Institute of Physics, 2000-11-01)

We have studied the thermal demagnetization in semi-infinite ferromagnets in Fe/MnF2 and Fe/Mn bilayers using Mössbauer spectroscopy. We find that the hyperfine field at the Fe/MnF2 interface follows a quasilinear temperature ...

Comparison of the electron-spin-resonance linewidth in multilayered CuMn spin glasses with insulating versus conducting interlayers

Leslie-Pelecky, D.L.; VanWijland, F.; Hoff, C.N.; Cowen, J.A.; Gavrina, A.; Chien, C.-L. (American Institute of Physics, 1994-05-15)

The temperature-dependent electron-spin-resonance linewidth ΔH(T) may be used to investigate the effect of the geometry and interlayer material on the magnetic properties of multilayered systems. We compare ΔH(T) in ...

Doubly exchange-biased NiCoO/NiFe/Cu/NiFe/NiCoO spin valves

Ambrose, T.; Liu, K.; Chien, C.-L. (American Institute of Physics, 1999-04-15)

A new type of doubly exchange-biased Ni50Co50O/NiFe/Cu/NiFe/Ni30Co70O spin-valve structure, with two ferromagnetic layers exchange biased in opposite directions by two different antiferromagnetic layers is demonstrated. ...