logo

korean english

게시판

Home > 게시판 > 세미나

일본 National Institute for Materials Science의 Taras Kolodiazhnyi 박사님을 초청하여 아래와 같이 특별 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁 드립니다. 

 

         아             래  

 

     1. 일시: 2015년 2월 10일(화) 오후 2시 

 

     2. 장소: 삼성학술정보관 7층 Creative Learning Room

 

     3. 초청연사: Taras Kolodiazhnyi 박사님 (National Institute for Materials Science)

 

     4. 제목: Extrinsic dielectric loss in single phase, atomically ordered Ba(Mg1/3M2/3)O3 where M = Nb, Ta
 

     5. Abstract: I will address the compositional stability range, microwave dielectric properties, and defect chemistry of the title compounds within the BaO-MgO-Ta2O5(Nb2O5) ternary diagram. I will further demonstrate that the dense, atomically ordered BaMg1/3Ta2/3O3 and BaMg1/3Nb2/3O3 ceramics show large variation of dielectric loss within a single phase composition region– a clear message that the dielectric loss in practical ceramics is dominated by extrinsic sources and that the cation order alone is insufficient to achieve a minimum dielectric loss in the title compounds. The low-temperature dielectric relaxation studies point out that the extrinsic dielectric loss in the title compounds is due to the ‘rattling’ of the off-centered Mg2+ ions misplaced at the Ba sites. Controlled deviation from the BaMg1/3M2/3O3 stoichiometry toward the Mg-deficient region leads to suppression of the extrinsic dielectric loss as a result of the reduced chemical activity of Mg ion.

번호 제목 날짜 조회 수
공지 2021학년도 2학기 콜로퀴움 일정 2021.07.01 14437
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 724176
493 <6/24(Fri.) 1:30pm>Emergent geometry from field theory: Wilson's renormalization group revisited 2016.06.20 46329
492 <May 10(Wed.) 4:30 PM>Trend and beyond of semiconductor technology (반도체 미세화 및 신기술 동향) 2017.05.04 46412
491 <March 8(Tue) 18:00> Unsolved puzzles of Gamma-Ray Bursts 2016.03.03 46424
490 <10/11(Tue.) 15:00>Analysis of Individual Terrestrial Gamma-ray Flashes 2016.10.10 46640
489 <Dec.12(Wed.)> First-principles studies of complex oxides interfaces 2018.12.05 46798
488 학술세미나 개최 안내: Local Modes in Vibrational (and Rotational) Spectroscopy file 2015.10.01 46804
487 <March.18(Fri) 11:00> High Pressure Synthesis and Characterization of Non-Oxide Superconductors 2016.03.14 47283
486 <Sep. 21(Wed.) 4:30 PM>광자질량의 물리학 2016.09.19 47335
485 <Dec. 7(Wed.) 4:30 PM>Mechanotransduction of cells in vitro(세포기능의 역학적 조절) 2016.11.30 47401
484 <March. 9(Wed.) 4:30 PM>가치 있는 대학 생활이란 무엇인가? file 2016.03.07 47409
483 <7/15(Fri.) 14:00> Electronic quasiparticles in the quantum dimer model 2016.07.12 47523
482 <7/15(Fri.) 11:00> Observation of a field induced quantum spin liquid in α-RuCl3 2016.07.14 47532
481 <March. 23(Wed.) 4:30 PM> 조선시대의 천문시계 2016.03.17 47671
480 <Oct. 5(Wed.) 4:30 PM> 국제원자력기구 (IAEA)와 핵데이터 2016.09.22 47740
479 <7/12(Tue.) 11:00> Spin-direction-dependent magnetoelastic coupling on MnO, CoO, and NiO file 2016.07.01 47787
478 <Sep. 18(Fri.) 4:00 PM> Special seminar 2015.09.16 47981
477 <May. 25(Wed.) 4:30 PM> Functional Materials @ Nanoscale: Electronics, Energy and ‘Green’Healthcare Applications 2016.05.23 48098
476 <Nov. 23(Wed.) 4:30 PM> Dry (Plasma) etch process in Semiconductor Device 2016.11.16 48439
475 <April. 5 (Wed.) 4:30 PM>Majorana quasiparticles emergent in Kitaev quantum magnets 2017.03.31 48516
474 <3/16(월)> 초청세미나 개최 안내 2015.02.27 48530