아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다.

아 래

제목: Controlling phases in epitaxial transition metal oxide thin films

연사: 진  형  진 교수님 (부산대학교 물리학과)

일시: 2015년 5월 27일(수)  오후 4:30

장소: 제1과학관 31214  첨단e+강의실

초록: Multi-valent transition metal oxides exhibit intriguing physical properties: ferroelectricity, superconductivity, ferromagnetism, ionic conductivity, and catalytic activity. It has been also known that physical properties can be easily changed by external stimuli and conditions, such as magnetic field, electric field, mechanical stress, thickness, and oxygen partial pressure. In many cases, such changes can be useful, if we can control, for electrochemical sensors, solid oxide fuel cells, magnetoelectric devices, and etc. With regards to this, two ways to control the physical properties of epitaxial thin films will be shown in this talk. For both cases, pulsed laser epitaxy (PLE) was used to form epitaxial transition metal oxides. As the first case, I will show the low temperature topotactic behavior in SrCoO_x (SCO), which is useful for catalysis and battery applications. The second case is about electric field control of the ferromagnetic region in epitaxial phase separated (La_1-yPr_y)_0.67Ca_0.33MnO₃ (LPCMO). This is a new magnetoelectric effect that is induced by shaping the ferromagnetic phase in electric fields.