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 1090586
176 <6/5> 물리학도가 증권가로 간 까닭은... 2013.05.29 70384
175 <5/29> Study on the electronic interactions in solids under high magnetic fields 2013.05.23 93028
174 <5/22> Computer-based Mathematical Analysis and Applications to Physics (컴퓨터 기반 수리해석과 물리학에의 응용) 2013.05.15 162136
173 <5/15> Quantum Critical Superconductivity 2013.05.09 71685
172 <5/8> Complex Networks: Through the 3D Looking Glass 2013.05.02 88556
171 <5/1> Entanglement and topological order in 1D and 2D systems 2013.04.18 118267
170 <4/17> Probing Stellar Explosions with Radioactive Beams* 2013.04.10 96542
» <4/10> Mapulation of spins in organic compounds 2013.04.03 101388
168 <4/3> 내 안의 파장을 바꿔라! 2013.03.29 67515
167 <3/27> Proximity effects and low dimensional superconductivity of Pb nano-islands  2013.03.21 86707
166 <3/20> 빛 : 우주의 신비를 푸는 열쇠 2013.03.14 70695
165 <3/13> Quantum computing using solid state nano-devices 2013.03.08 68795
164 2013학년도 1학기 콜로퀴움 일정 2013.02.19 72529
163 <12/12> 자성체의 스커미온 동역학 2012.12.06 72829
162 <12/5> 과학용어와 의학용어에 숨겨진 이야기 2012.11.28 72342
161 <11/28> 별이 빛나는 밤에… 2012.11.22 71641
160 <11/21> 복잡 산화물 이종접합 및 다강체 연구(Complex oxide heterostructures and multiferroics) 2012.11.15 97112
159 <11/14> Next Generation LED 2012.11.08 68281
158 <11/7> Two- and three- body problems in classic and quantum mechanics 2012.10.29 86285
157 <10/31> Large-Scale Quantitative Analysis of Painting Arts 2012.10.18 212124