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 2022학년도 1학기 콜로퀴움 일정 2022.01.10 27851
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 973077
225 <9/5> Dark Matter and Dark Energy in Cosmology 2008.09.01 76264
224 <10/26> 빛으로 보는 세상 2011.10.17 76244
223 <4/10> Holographic Nucleons: In Search of a String Theoretical Solution to QCD 2009.04.06 76126
222 <11/2>반도체성 나노구조 2007.11.01 76100
221 2008학년도 1학기 콜로퀴움 일정 안내 2008.03.04 75777
220 <11/17>의학에서의 치료음향 Therapeutic Sound in Medicine 2006.11.15 75642
219 <9/26> High Energy Physics as e-Science 2008.09.22 75462
218 <Oct. 7(Wed.) 4:30 PM> Observing Ultra High Energy Cosmic Rays with your Smartphone 2015.10.02 75294
217 <12/4> The "Physics" of Climate Change 2009.12.02 75156
216 <9/10> Low temperature graphene synthesis 2010.08.30 74883
215 <10/30> Nambu and the Standard Model 2009.10.27 74784
214 <11/10>한국원전중성미자실험(RENO) 2006.11.08 74682
213 <10/8(수> Astrophysical probes of Dark Matter, the case of the Milky Way 2014.10.01 74650
212 <9/15> 2006.09.07 74628
211 <4/6> Introduction to Superconducting Quantum Electronics 2007.04.03 74560
210 <Oct.16(Wed.)> 솟구치는 초고에너지 입자의 미스테리 2019.10.10 74459
209 <Oct.10(Wed.) 4:30 PM> Standard Model of Cosmology and Beyond 2018.09.21 74410
208 <3/16> Introduction to Experimental Nuclear Astrophysics 2007.03.15 74197
207 콜로퀴움입니다. 2005.12.29 74180
206 <Nov. 30(Wed.) 4:30 PM> Chiral solitons for topological informatics 2016.11.23 74166