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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 ...
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    Partial order from disorder in a classical pyrochlore antiferromagnet 

    Chern, Gia-Wei; Moessner, R.; Tchernyshyov, O. (American Physical Society, 2008-10-01)
    We investigate theoretically the phase diagram of a classical Heisenberg antiferromagnet on the pyrochlore lattice perturbed by a weak second-neighbor interaction J2. The huge ground-state degeneracy of the nearest-neighbor ...
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    Quantum criticality in an organic magnet 

    Stone, M. B.; Broholm, C.; Reich, D.H.; Tchernyshyov, O.; Vorderwisch, P.; Harrison, N. (American Physical Society, 2006-06-30)
    Exchange interactions between S=½ sites in piperazinium hexachlorodicuprate produce a frustrated bilayer magnet with a singlet ground state. We have determined the field-temperature phase diagram by high field magnetization ...
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    Condensation of magnons and spinons in a frustrated ladder 

    Fouet, J.-B.; Mila, F.; Clarke, D.; Youk, H.; Tchernyshyov, O.; Fendley, P.; Noack, R. M. (American Physical Society, 2006-06-01)
    Motivated by the ever-increasing experimental effort devoted to the properties of frustrated quantum magnets in a magnetic field, we present a careful and detailed theoretical analysis of a one-dimensional version of this ...
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    Topological defects in flat nanomagnets: the magnetostatic limit 

    Chern, G.-W.; Youk, H.; Tchernyshyov, O. (American Institute of Physics, 2006-04-15)
    We discuss elementary topological defects in soft magnetic nanoparticles in the thin-film geometry. In the limit dominated by magnetostatic forces the low-energy defects are vortices (winding number n=+1), cross ties (n=-1), ...
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    Composite domain walls in flat nanomagnets: the magnetostatic limit 

    Youk, H.; Chern, G.-W.; Merit, K.; Oppenheimer, B.; Tchernyshyov, O. (American Institute of Physics, 2006-04-15)
    We discuss the structure of the so-called 'vortex' domain walls in soft magnetic nanoparticles. A wall of this kind is a composite object consisting of three elementary topological defects: two edge defects with winding ...
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    Wrinkling of a bilayer membrane 

    Concha, A.; McIver, J. W.; Mellado, P.; Clarke, D.; Tchernyshyov, O.; Leheny, R. L. (American Physical Society, 2007-01)
    The buckling of elastic bodies is a common phenomenon in the mechanics of solids. Wrinkling of membranes can often be interpreted as buckling under constraints that prohibit large-amplitude deformation. We present a ...
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    Dynamics of a vortex domain wall in a magnetic nanostrip: application of the collective-coordinate approach 

    Clarke, D.J.; Tretiakov, O. A.; Chern, G.-W.; Bazaliy, Ya.B.; Tchernyshyov, O. (American Physical Society, 2008-10-01)
    The motion of a vortex domain wall in a ferromagnetic strip of submicron width under the influence of an external magnetic field exhibits three distinct dynamical regimes. In a viscous regime at low fields the wall moves ...
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    Dynamics of domain walls in magnetic nanostrips 

    Tretiakov, O. A.; Clarke, D.; Chern, Gai-Wei; Bazaliy, Ya.B.; Tchernyshyov, O. (American Physical Society, 2008-03-28)
    We express the dynamics of domain walls in ferromagnetic nanowires in terms of collective coordinates, generalizing Thiele[psila]s steady-state results. For weak external perturbations the dynamics is dominated by a few ...
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    Stripes in thin ferromagnetic films with out-of-plane anisotropy 

    Clarke, David; 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 ...

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    Tchernyshyov, O. (10)
    Clarke, D. (4)Tretiakov, O. A. (4)Chern, G.-W. (3)Youk, H. (3)Bazaliy, Ya.B. (2)Broholm, C. (1)Cheng, X.M. (1)Chern, Gai-Wei (1)Chern, Gia-Wei (1)... View MoreSubjectferromagnetic materials (3)magnetic domain walls (3)antiferromagnetic materials (2)Co-Pt (2)edge defects (2)ferromagnetism (2)flat nanomagnets (2)magnetic multilayers (2)magnetostatic limit (2)magnons (2)... View MoreDate Issued2006 (4)2007 (3)2008 (3)Has File(s)Yes (10)

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