Growth of superconducting thin films by a PLD (pulsed laser deposition) and a HPCVD (hybrid physical-chemical vapor deposition) techniques and study of physical properties for superconductors such as cuprates superconductors, Fe-based superconductors, and MgB2 superconductors. By using PPMS (physical property measurement system) and MPMS ( magnetic property measurement system), we investigate vortex dynamics in the mixed states in the wide temperature ranges of 2-300 K and the magnetic field ranges up to 9 Tesla.
(PhD) 1994, Physics department, Sungkyunkwan University
2005-present, Professor, Sungkyunkwan University
2003-2005, Assistant professor, Pukyung University
1995-2003, Research professor, POSTECH and University of Houston
2016-present, Vice-president, Korean superconductivity society
2013-2015, Editor in chief, Progress in superconductivity
2012-2014, Review board member, National research foundation of Korea
Roles of Fe-ion irradiation on MgB2 thin films: Structural, superconducting,
and optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS.
Correlation between electron-phonon coupling and superconductivity of
Sn2+ ion irradiated MgB2-thin films.
Hall effects of c-axis-oriented Mg1_xAlxB2 thin film.
Effects of Sn-ion irradiation on local structure and flux pinning properties of MgB2 thin films.
High critical current density and high-tolerance superconductivity in high-entropy alloy thin films.
Improvement of bulk superconducting current capability of MgB2 films using surface degradation.
Influence of disorder strength on the superconducting mechanism of MgB2.
SUPERCONDUCTOR SCIENCE TECHNOLOGY.
Competition between ferromagnetism and superconductivity in GdBa2Cu3O7-x/La0.7Sr0.3MnO3 bilayers with varying thickness.
Field-induced quantum breakdown of superconductivity in magnesium diboride.
NPG ASIA MATERIALS.
Tuning Flux Pinning in GdBa2Cu3O7-x/La0.7Sr0.3MnO3 Epitaxial Bilayers via Substrate-Induced Strain.
CRYSTAL GROWTH & DESIGN.
Local structure and superconductivity in (Bi1.6Pb0.4Sr2Ca2Cu3O10+6)1-x(Fe3O4)x compounds.
Effects of surface damage on critical current density in MgB2 thin films.
CURRENT APPLIED PHYSICS.
Electron-phonon coupling behavior in MgB2 films with various thicknesses of ZnO buffer layer on metallic substrates.
SOLID STATE COMMUNICATIONS.
Unraveling the Scaling Characteristics of Flux Pinning Forces in Bi1.6Pb0.4Sr2Ca2-xNaxCu3O10+delta Superconductors.
JOURNAL OF ELECTRONIC MATERIALS.
Angle-dependent Hall effect and vortex dynamics in single-crystalline MgB2 thin films.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY.