KyungSung Yun

Layer-by-layer growth and magnetic properties of Y3Fe5O12 thin films on Gd3Ga5O12

We report on the layer-by-layer growth of epitaxial yttrium-iron-garnet (Y3Fe5O12) thin films on (111) and (110) Gd3Ga5O12 substrates as verified by the intensity oscillations of reflection high energy electron diffraction during pulsed laser deposition. X-ray diffraction indicates pseudomorphic lattice structure with slight expansion along out of plane from cubic one. The saturation magnetization well reproduces the full moment observed for bulk crystals. The crystallographic magnetic anisotropy was also preserved regardless of shape anisotropy in different orientations. Magnetic anisotropy similar to bulk crystals was observed for as-grown films which have not been subject to a postannealing process.

Volumetric Optical Recording Using a 400 nm All-Semiconductor Picosecond Laser

We have demonstrated volumetric optical recording using an all-semiconductor picosecond laser, which generated optical pulses with a duration of 3 ps and a maximum peak power of 100 W at a wavelength of 404 nm and a repetition frequency of 1 GHz. This pulsed laser system efficiently induced multiphoton absorption in the recording media due to its high peak power and high repetition rate. The recording marks were formed as submicrometer voids inside a single thick recording layer by multiphoton absorption. A clear readout signal was obtained from the recorded marks.

Periodic oscillations of Josephson-vortex flow resistance in oxygen-deficient Y Ba 2 Cu 3 O x

We measured the Josephson vortex flow resistance as a function of magnetic field applied parallel to the

Intrinsic Josephson junctions in Y1Ba2Cu3Ox single-crystal whiskers grown using Te-doped precursors

ab

Dynamic Recording of 200 Gbytes in Three-Dimensional Optical Disk by a 405 nm Wavelength Picosecond Laser

planes using annealed

Lock-in Phenomena of Josephson Vortices under Vicinal Layer Parallel Magnetic Field

\mathrm{Y}{\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{x}

Growth of Y1Ba2Cu3Ox Single-Crystal Whisker Using Sb-doped Precursor

intrinsic Josephson junctions having high anisotropy

Direct Observation of Local Shielding Currents in Superconducting Thin Films under Low Magnetic Field by Scanning Superconducting Quantum Interference Device Microscopy

(\ensuremath{\sim}40)

Volumetric Optical Recording with Void Marks Using an All-Semiconductor Picosecond Laser

by oxygen content reduction. Periodic oscillations were observed in magnetic fields above

Direct observation of quantized interlayer vortex flow in a high-Tc La1.87Sr0.13CuO4 single crystal

45\char21{}58\phantom{\rule{0.3em}{0ex}}\mathrm{kOe}