logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다

 

아 래

 

제목: Mapulation of spins in organic compounds

 

연사: 유   정   우 교수님 (울산과학기술대학교)

 

일시: 2013년 4월 10일(수) 오후4:30

 

장소: 제1과학관 31214  e+첨단강의실 

 

초록:  Recent years witnessed increasing research activity in exploiting carbon-based materials as a spin transporting channel, which introduces a new avenue for device integration and functionality. Molecule/organic-based magnets, that allow chemical tuning of electronic and magnetic properties, are a promising new class of magnetic materials for future spintronics. The advantages of using organic-based magnets as spin polarizers in spintronic applications include, chemical tunability, highly spin-polarized electronic nature, low temperature processing, optical control of magnetism and conductivity, etc

 

In this talk, I will present realization of an organic-based magnetic/non-magnetic semiconductor as an electron spin polarizer/spin transporting layer in the standard spintronic device geometry [1,2]. The application of organic small molecule films as the spin transporting layer has been studied extensively recently. However, conceptual understanding of how the spins are injected into and transport through these organic semiconductor films was still lacking. With careful study on film thickness, temperature, and bias dependencies, significant differences between tunneling and giant magnetoresistance were resolved [1]. In addition, the room temperature organic-based magnet, V(TCNE)x was successfully incorporated into the standard magnetic tunnel junction devices in tandem with LSMO(La2/3Sr1/3MnO3) film [2]. The development of a practical methodology for finely-controlled film growth of an organic-based magnet yielding conformal air stable film morphology with magnetic ordering temperature above room temperature and electrical conductivity comparable to that of inorganic semiconductors is essential to enable a wide range of yet to be realized applications of this hybrid material. Here, by using molecular layer deposition (MLD), we demonstrate the fabrication of thin film laminates of V[TCNE: tetracyanoethylene]x[3]. The new hybrid laminate films we developed exhibit major improvement in surface morphology, magnetic and electrical properties, as well as with respect to air-stability.

 

[1] Jung-Woo Yoo, H. W. Jang, V.N. Prigodin, C. Kao, C.B. Eom, and A.J. Epstein, Phys. Rev. B 80, 205207 (2009)

[2] Jung-Woo Yoo, C.-Y. Chen, H. W. Jang, C. W. Bark, V. N. Prigodin, C. B. Eom, and A. J. Epstein, Nature Materials 9, 638 (2010).

[3] Chi-Yueh Kao, Jung-Woo Yoo, Yong Min, and Arthur J. Epstein, ACS Appl. Mater. & Inter. 4, 137 (2012)

 

 

 



번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1031103
222 <8/17> Is Quantum Criticality a Key to Unconventional Superconductivity? 2006.08.09 86267
221 <3/26> Shedding infrared light on high-Tc superconductors 2014.03.19 86352
220 <4/16>같은 곳을 바라보는 다른 시선 2010.04.09 86384
219 <10/8(수> Astrophysical probes of Dark Matter, the case of the Milky Way 2014.10.01 86440
218 <1/14>Dark Matter signals from PAMELA and ATIC 2009.01.12 86465
217 <5/12> An Infrared View of the Universe 2006.05.09 86536
216 <12/21(Fri) 3:00pm ~ > Quasilocal Smarr Relations / Expanding Universe and Dynamical Compactification Using Yang-Mills Instantons 2018.12.17 86553
215 <2/15> Perturbation during Inflation 2011.02.11 86891
214 <9/26(Thu.) 4:30 pm ~ > Neutrino Physics and Dark Matter search in IBS 2019.09.24 86937
213 <11/4>Plasmonic Properites of Metallic Nanostructures 2009.10.30 86980
212 <11/11> Revealing magnetism of nanoislands with quantitative insights into spin-polarized scanning tunneling spectroscopy 2013.11.05 87149
211 <11/20> Particle Accelerators: Driving Forces for Energy 2009.11.16 87238
210 <9/19> Novel mechanical degree of freedom at nanoscales 2012.09.13 87321
209 <10/9> Smearing effect of membrane in plane-wave matrix model 2009.10.05 87415
208 <5/16(Thu.) 14:00 ~ >The Chiral anomaly without Landau levels 2019.05.08 87418
207 2007학년도 2학기 콜로키엄 schedule 안내 2007.09.27 87502
206 <2/11>Marginal Deformations For Lower Dimensional D-bran... 2008.02.05 87583
205 <12/7>유럽입자물리연구소에서의 CMS 실험 2007.12.03 87814
204 <6/19> 초전도 특별세미나 2012.06.11 87828
203 <6/12> Latest Results from the IceCube Neutrino Observatory 2013.06.07 87935