S. M. Yang

Electric-field-controlled directional growth of ferroelectric domains in multiferroic BiFeO3 films (2009)

Kim, T. H., Yang, S. M., Jang, S. Y., Ortiz, D., Song, T. K., ...

We describe the directional growth of ferroelectric domains in a multiferroic BiFeO3 thin film, which was grown epitaxially on a vicinal (001) SrTiO3 substrate. A detailed structural analysis of the...

Nonlinear Dynamics of Domain Wall Propagation in Epitaxial Ferroelectric Thin Films (2009)

Jo, J. Y., Yang, S. M., Kim, T. H., Lee, H. N., Park, S., ...

We investigated the ferroelectric domain wall propagation in epitaxial Pb(Zr,Ti)O3 thin films over a wide temperature range (3 - 300 K). We measured the domain wall velocity under various electric...

Domain wall motion in epitaxial Pb(Zr,Ti)O3 capacitors investigated by modified piezoresponse force microscopy (2008)

Yang, S. M., Jo, J. Y., Kim, D. J., Sung, H., Noh, T. W., Lee, H. N., ...

We investigated the time-dependent domain wall motion of epitaxial PbZr0.2Ti0.8O3 capacitors 100 nm-thick using modified piezoresponse force microscopy (PFM). We obtained successive domain evolution...

Composition-dependent polarization switching behaviors of (111)-preferred polycrystalline Pb(Zr_{x}Ti_{1-x})O_{3} thin films (2007)

Jo, J. Y., Yang, S. M., Han, H. S., Kim, D. J., Choi, W. S., Noh, T. W., ...

We investigated the time-dependent polarization switching behaviors of (111)-preferred polycrystalline Pb(ZrxTi1-x)O3 thin films with various Zr concentrations. We could explain all the polarization...

Observation of inhomogeneous domain nucleation in epitaxial Pb(Zr,Ti)O3 capacitors (2007)

Kim, D. J., Jo, J. Y., Kim, T. H., Yang, S. M., Chen, B., Kim, Y. S., ...

We investigated domain nucleation process in epitaxial Pb(Zr,Ti)O3 capacitors under a modified piezoresponse force microscope. We obtained domain evolution images during polarization switching...

Rheological characterization and optimization of gelled electrolyte for sealed lead-acid batteries by small amplitude dynamic oscillation measurement (2005)

Park, J., Park, S.B., Yang, S.M., Hong, W.H., Choi, C.R., Kim, J.H.

Rheological behavior of silica gel in sulfuric acid was investigated with a small amplitude dynamic oscillation measurement method in which storage 'modulus was monitored with time. For the purpose...

Engineered sensitivity of structured tin dioxide chemical sensors: opaline architectures with controlled necking (2003)

Scott, R.W.J., Yang, S.M., Coombs, N., Ozin, G.A., Williams, D.E.

Structure-property relationships in tin dioxide materials have been studied utilizing a reverse templating strategy to synthesize opaline structures with controlled neck dimensions between spheres....

Tin dioxide opals and inverted opals: near-ideal microstructures for gas sensors (2001)

Scott, R.W.J., Yang, S.M., Chabanis, G., Coombs, N., Williams, D.E., Ozin, G.A.

Fault-Tolerant Parallel Computer Systems for Teal-Time Applications. (1998)

Yang, S. M., Carroll, Bill D.

The objective of our research was to investigate techniques for designing fault-tolerant parallel computer systems for critical real-time applications. The focus of our research was to develop the...