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 1032527
681 2019학년도 2학기 콜로퀴움 일정 2019.07.17 421183
680 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 325066
679 2017학년도 1학기 콜로퀴움 일정 2017.01.05 260897
678 2020학년도 1학기 콜로퀴움 일정 2020.01.31 251293
677 <Mar.3(Wed.)>Scaling laws in Natural Language Processing 2021.02.25 220262
676 <10/25> Wave properties of dipole-exchange spin waves in confined magnetic thin films 2006.10.25 219152
675 <5/16> 물리학자가 바라 본 단백질: 왜, 어떻게 연구하는가? 2012.05.10 213649
674 <8/30(Wed.)10:30>​Technology convergence and applications of Large-Area Electronics, e-Textiles, bio-sensors and bio-electronics 2017.08.29 212288
673 <3/14>Adaptive Optics for the Human Eye and Ophthalmic Applications 2008.03.12 211214
672 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 205770
671 <5/16(토)> 세미나 개최 안내 2015.05.18 188931
670 <12/21> Special Seminar by Professor Ilya Vekhter 2010.11.30 186209
669 <6/11> Advanced Physiological Optics and Its Ophthalmic Applications 2014.05.28 180201
668 <11/6> Graphene plasmon and Plasmonics 2013.10.31 173447
667 <6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model 2009.06.16 173371
666 <11/5(화)> 특별세미나 개최 안내 2013.11.01 165682
665 <May. 25(Wed.) 4:30 PM> Functional Materials @ Nanoscale: Electronics, Energy and ‘Green’Healthcare Applications 2016.05.23 164590
664 <Sep. 23(Wed.) 4:30 PM>Grain boundary effect in Metal : A journey of discovery from crystal to thin films without grain boundaries 2015.09.16 162263
663 <Dec. 1(Wed.)>Halide Perovskite Single Crystals and Thin Films for Solar Cells and Optoelectronics 2021.11.25 159181