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 1079492
» <4/10> Mapulation of spins in organic compounds 2013.04.03 96921
289 2016학년도 2학기 콜로퀴움 일정 2016.08.02 96510
288 2007학년도 2학기 콜로키엄 schedule 안내 2007.09.27 96440
287 <3/9> Understanding the Nature of Metal-Insulator Transition in a Single Crystalline VO2 nanowires 2011.03.04 96131
286 <11/21> 복잡 산화물 이종접합 및 다강체 연구(Complex oxide heterostructures and multiferroics) 2012.11.15 95622
285 <May.16(Wed.) 4:30 PM> Single crystal growth of metal film and metal oxide film on different substrates and their various applications 2018.05.09 95594
284 <9/8>Dynamics of one-dimensional electrons and exotic elementary excitations 2006.09.04 95269
283 <9/18> 생체계에서의 협동현상: 박테리아 수영에서부터 고분자 수송현상까지 2009.09.14 94878
282 <Nov.18(Wed.)>When Physics meets the Living Cells 2020.11.11 94844
281 <4/17> Probing Stellar Explosions with Radioactive Beams* 2013.04.10 94671
280 <5/14> Synthesis of Two Dimensional Materials by Chemical vapor deposition 2014.05.07 94572
279 <12/7>유럽입자물리연구소에서의 CMS 실험 2007.12.03 94384
278 <6/12> Latest Results from the IceCube Neutrino Observatory 2013.06.07 94377
277 <11/20> Particle Accelerators: Driving Forces for Energy 2009.11.16 94286
276 <5/23> Nanotechnology in Korea: Present Status and Perspective 2008.05.21 94211
275 <11/26> The Carbon New Age 2010.11.18 94201
274 <10/13> What has happened in the beginning of the universe? 2006.10.11 94031
273 <9/11> Epitaxial Oxygen Sponge 2013.09.09 93903
272 <3/12> Nano Structure of wide Band Gap Semiconductors 2010.03.08 93885
271 <Sep. 30(Wed.) 4:30 PM>Local electronic structures of stacking grain boundary in bilayer graphene 2015.09.23 93697