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 1058555
222 <12/5> 과학용어와 의학용어에 숨겨진 이야기 2012.11.28 71270
221 <8/1(Wed.) 4:00pm>Band Topology in Nodal Line Semimetals with Z2 Monopole Charges 2018.07.23 71166
220 <12/12> 자성체의 스커미온 동역학 2012.12.06 71035
219 2013학년도 1학기 콜로퀴움 일정 2013.02.19 70973
218 <12/2(화)> Emergent Quantum Phenomena in SrTiO3 Heterostructures 2014.11.21 70960
217 <6/4> Korea's challenges ahead for nuclear energy industry 2010.05.31 70956
216 <2/7>Emergent p-wave Kondo Coupling in Multi-Orbital Bands with Mirror Symmetry Breaking 2013.02.06 70820
215 <11/28> 별이 빛나는 밤에… 2012.11.22 70762
214 <10/24> Dung-hai Lee 교수와의 간담회 2012.10.23 70752
213 <6/11> 나노제조기술의 개요 및 응용 2010.06.07 70725
212 <9/7> On Dark Matter and its indirect detection with box-shaped gamma-rays 2012.09.05 70575
211 <10/5> Gauge fields. Past, present, future. 2012.10.05 70389
210 <11/22> Spin polarization of photoelectrons from a topological insulator 2012.10.22 70370
209 2012학년도 2학기 콜로퀴움 일정 안내 2012.09.03 70263
208 <12/6(Fri.)>topological phase transitions in Kitaev quantum spin liquids. 2019.12.04 70228
207 <5/15> Quantum Critical Superconductivity 2013.05.09 70070
206 <9/14> High temperature superconductivity and fluctuating stripe 2012.09.10 69966
205 <Aug. 4(Wed.)>Electronic Properties of Mixed-dimensional 2D/3D Heterostructures 2021.08.04 69748
204 <4/30> Physical principles and applications of ultrasound in diagnostics and therapy 2014.04.22 69388
203 <6/5> 물리학도가 증권가로 간 까닭은... 2013.05.29 69372