Lee, Woo, Han, Hee, Lotnyk, Andriy, Schubert, Markus Andreas, Senz, Stephan, Alexe, Marin, ...
Ferroelectric materials have emerged in recent years as an alternative to magnetic and dielectric materials for nonvolatile data-storage applications1, 2, 3, 4, 5. Lithography is widely used to...
Singh, Akhilesh Kumar, Mishra, Sunil Kumar, Pandey, Dhananjai, Yoon, Songhak, Baik, Sunggi, ...
Temperature dependent structural changes in a nearly pure monoclinic phase composition (x=0.525) of Pb(Zr_xTi_1-x)O_3 (PZT) have been investigated using Rietveld analysis of high-resolution...
Singh, Akhilesh Kumar, Pandey, Dhananjai, Yoon, Songhak, Baik, Sunggi, Shin, Namsoo
Results of Rietveld analysis of the synchrotron XRD data on Pb(Zr_xTi_1-x)O_3 (PZT) for 0.525\leqx\leq0.60 are presented to show the absence of rhombohedral phase on the Zr-rich side of the...
Singh, Satendra Pal, Pandey, Dhananjai, Yoon, Songhak, Baik, Sunggi, Shin, Namsoo
The existing controversy about the room temperature structure of multiferroic Pb(Fe_1/2Nb_1/2)O_3 is settled using synchrotron powder x-ray diffraction data. Results of Rietveld refinements in the...
Microwave Dielectric Spectroscopy of Ferroelectric Thin Films (2003)
Kim, Beomjin, Kazmirenko, Victor, Jeong, Minki, Poplavko, Yuri, Baik, Sunggi
We devised a measurement method of microwave dielectric constants of dielectric thin films without applying electrodes. The method uses a rectangular waveguide in which the dielectric thin films...
Electrically Tunable Phase Shifters with Air-Dielectric Sandwich Structure (2003)
Jeong, Minki, Kazmirenko, Victor, Poplavko, Yuriy, Kim, Beomjin, Baik, Sunggi
Electrically tunable microwave phase shifter was developed by inserting dielectric slab and piezoelectric actuator inside a waveguide. Air-dielectric sandwich structure of dielectric material and...
Hot Isostatic Pressing of Sintered Silicon Nitride. (1998)
Pressureless-sintered silicon nitride with varying additives was hot isostatic pressed under 150 MPa of nitrogen at 1800 C. Moderate increases in densities were observed when sintered densities...
Hot Isostatic Pressing of Sintered Silicon Nitride. (1998)
Silicon nitride ceramics were fabricated by pressureless sintering and then hot isostatic pressed under 150 MPa of nitrogen at 1800 C. Density changes by hot isostatic pressing (HIPing) varied...
Critical Concentration of MgO for the Prevention of Abnormal Grain Growth in Alumina. (1998)
The effects of MgO on sintering and grain growth of alumina in the absence of any other impurities as well as in the presence of various amounts of CaO were investigated using ultrapure (>99.999%)...