| 학회 | 한국재료학회 |
| 학술대회 | 2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 | 17권 2호 |
| 발표분야 | B. Nanomaterials and Processing Technology(나노소재기술) |
| 제목 | Tunable magnetism by magnetic phase in Fe3O4/ZnO multilayer |
| 초록 | Abstract : Fe3O4 having half metallic property is one of the efficient spin filtering materials which are widely used in spintronic research field and ZnO is wide band gap semiconductor which can be used by tunnel barrier or semiconductor channel in spin MOSFET. We investigated the magnetic and the electric properties of Fe3O4/ZnO multilayer fabricated on c-Al2O3 substrate by pulsed laser deposition (PLD). For multilayer films, PLD was performed at variable temperatures such as 200-750°C and at target distance from 40 to 80mm, KrF eximer laser of 1.5 J/cm2 and a reputation rate of 2Hz. Fe3O4/ZnO multilayers were deposited at 410-6 Torr. After fabricating Fe3O4/ZnO multilayers, Fe3O4/ZnO multilayers were treated by RTA(Rapid Thermal Annealing) at various temperature to change magnetic phase. The magnetism of the multilayer is changed by thickness of the ZnO tunnel barrier. Magnetic phase of FexOy showed a very small magnetism due to Fe2O3 α-phase, but large magnetism from Fe3O4 or Fe2O3 γ-phase was observed. In the present study, effect of the ZnO thickness on the MR (magnetoresistance) ratio was investigated in detail. |
| 저자 | 윤종구1, 박창엽2, 윤순길1 |
| 소속 | 1충남대, 2카이스트 물리학과 |
| 키워드 | Fe3O4; ZnO; magnetic property; pulsed laser deposition |
