Je-Ho Shim

Electronic structure of Zn1−xCoxO using photoemission and x-ray absorption spectroscopy

Electronic structures of homogeneous bulk samples of Zn0.9Co0.1O which do not exhibit diluted ferromagnetic semiconducting (DMS) behavior have been investigated using photoemission spectroscopy and x-ray absorption spectroscopy. We have found that the Co ions in Zn1−xCoxO are in the divalent Co2+(d7) states under the tetrahedral symmetry. Our finding indicates that the DMS properties will not be produced when Co ions are properly substituted for Zn sites, implying that the DMS properties observed in Zn1−xCoxO thin films are likely to be extrinsic.

Electronic structures of antiperovskite superconductors Mg X Ni 3 ( X = B , C, and N)

We have investigated electronic structures of a newly discovered antiperovskite superconductor

Bulk-sensitive photoemission spectroscopy of A 2 FeMoO 6 double perovskites ( A = Sr , Ba )

{\mathrm{MgCNi}}_{3}

Intrinsic pinning behavior and propagation onset of three-dimensional Bloch-point domain wall in a cylindrical ferromagnetic nanowire

and related compounds

Domain Wall Propagation in Wavy Ferromagnetic Nanowire

{\mathrm{MgBNi}}_{3}

Resonant photoemission spectroscopy study of impurity-induced melting in Cr- and Ru-dopedNd1/2A1/2MnO3(A=Ca,Sr)

and

Ratchet effect of the domain wall by asymmetric magnetostatic potentials

{\mathrm{MgNNi}}_{3}.

Ferromagnetic Resonance Study of Annealed NiFe/FeMn/CoFe Trilayers

In

Nonlinear motion of magnetic vortex under alternating-current magnetic field: Dynamic correction of a gyrovector and a damping tensor of the Thiele’s equation

{\mathrm{MgCNi}}_{3},

Spontaneous Domain Wall Motion at Zero External Magnetic Field in Ferromagnetic Nanowire

a peak of very narrow and high density of states is located just below the Fermi level, which corresponds to the