korean english


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 1031226
362 <11/13> Computer-Aided Engineering for Nucleic Acid Nanostructures 2013.11.07 99780
361 <11/6> Graphene plasmon and Plasmonics 2013.10.31 171093
360 <10/30> 광섬유 센서 2013.10.17 63412
359 <10/16> SPM Study of CVD Graphene on h-BN Film 2013.10.04 89246
358 <10/2> What's the matter? 2013.09.26 64924
357 <9/25> 청각의 물리학: 어떻게 노이즈를 극복하는가? 2013.09.16 118655
356 <9/11> Epitaxial Oxygen Sponge 2013.09.09 89637
355 2013학년도 2학기 콜로퀴움 일정 2013.09.06 81196
354 <6/12> Latest Results from the IceCube Neutrino Observatory 2013.06.07 87940
353 <6/5> 물리학도가 증권가로 간 까닭은... 2013.05.29 68331
352 <5/29> Study on the electronic interactions in solids under high magnetic fields 2013.05.23 85470
351 <5/22> Computer-based Mathematical Analysis and Applications to Physics (컴퓨터 기반 수리해석과 물리학에의 응용) 2013.05.15 121992
350 <5/15> Quantum Critical Superconductivity 2013.05.09 68851
349 <5/8> Complex Networks: Through the 3D Looking Glass 2013.05.02 83133
348 <5/1> Entanglement and topological order in 1D and 2D systems 2013.04.18 96533
347 <4/17> Probing Stellar Explosions with Radioactive Beams* 2013.04.10 89639
» <4/10> Mapulation of spins in organic compounds 2013.04.03 88030
345 <4/3> 내 안의 파장을 바꿔라! 2013.03.29 65697
344 <3/27> Proximity effects and low dimensional superconductivity of Pb nano-islands  2013.03.21 75983
343 <3/20> 빛 : 우주의 신비를 푸는 열쇠 2013.03.14 67727