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Publications

Prof. Zonghoon Lee’s Atomic-Scale Electron Microscopy Lab

Publications

Link to Google Scholar


Publications in Nature | Science | their sister journals


Nature, 2021 Nature, 582, 511-514, 2020 / Nature Nanotechnology, 15, 289-295, 2020 / Nature Nanotechnology, 15, 59-66, 2020 / Science Advances, 6 (10), eaay4958, 2020 / Nature Electronics, 3, 207-215, 2020 / Nature Communications, 11 (1437), 2020 / Nature Energy, 3, 773-782, 2018 / Nature Communications, 8:1549, 2017 / Nature Communications, 6:8294, 2015 / Nature Communications, 6:7817, 2015 / Nature Communications, 5:3383, 2014




​Abstract 


 Stoichiometric Ti1−xCoxO2 and oxygen-deficient Ti1−xCoxO2−δ thin films were grown on Si (001) by plasma-enhanced metal-organic chemical vapor deposition and their microstructures and ferromagnetic properties were investigated. The stoichiometric film grown at 430 °C showed no discernable Co metal clustering or measurable coercive field. In contrast, oxygen-deficient films fabricated without supplying O2 contained significant Co clusters of ~10–20 nm, which appeared to be the major reason for the observed room-temperature ferromagnetism. With increasing oxygen vacancies of the films, the coercive field and saturation magnetization values increased to ~460 Oe and ~27 emu/cm3 (1.55μB/Co atom) approached that for bulk cobalt, respectively.

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2011

Prior to Joining UNIST, 2011

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