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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics


Tailoring ergodicity through selective A-site doping in the Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3 system

DC Field Value Language Acosta, Matias ko Liu, Na ko Deluca, Marco ko Heidt, Sabrina ko Ringl, Ines ko Dietz, Christian ko Stark, Robert W. ko Jo, Wook ko 2015-05-26T03:23:01Z - 2015-05-20 ko 2015-04 ko
dc.identifier.citation JOURNAL OF APPLIED PHYSICS, v.117, no.13, pp.1 - 8 ko
dc.identifier.issn 0021-8979 ko
dc.identifier.uri -
dc.description.abstract The morphotropic phase boundary composition Bi1/2Na1/2TiO3-20 mol. % Bi1/2K1/2TiO3 was chosen as initial material to do selective A-site aliovalent doping replacing Na and K by 1 at. % La, respectively. The materials were studied macroscopically by measuring dielectric and electromechanical properties. The Na-replaced material has a lower freezing temperature Tfr, lower remanent polarization and remanent strain, and thus a higher degree of ergodicity than the K-replaced material. These results are contrasted with local poling experiments and hysteresis loops obtained from piezoresponse force microscopy. The faster relaxation of the tip-induced local polarization and the lower remanent state in bias-on and-off loops confirm the higher degree of ergodicity of the Na-replaced material. The difference in functional properties is attributed to small variations in chemical pressure achieved through selective doping. Raman results support this working hypothesis. ⓒ 2015 AIP Publishing LLC ko
dc.description.statementofresponsibility open -
dc.language 영어 ko
dc.publisher AMER INST PHYSICS ko
dc.title Tailoring ergodicity through selective A-site doping in the Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3 system ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84926687413 ko
dc.identifier.wosid 000352645100025 ko
dc.type.rims ART ko
dc.description.wostc 1 *
dc.description.scopustc 0 * 2015-12-28 * 2015-11-04 *
dc.identifier.doi 10.1063/1.4916719 ko
dc.identifier.url ko
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