| 학회 | 한국재료학회 |
| 학술대회 | 2019년 가을 (10/30 ~ 11/01, 삼척 쏠비치 호텔&리조트) |
| 권호 | 25권 2호 |
| 발표분야 | G. 나노/박막 재료 분과 |
| 제목 | Structural and magnetic properties of BaTiO3-Y3Fe5O12 composite thin films grown by RF magnetron sputtering |
| 초록 | Complex oxide composite thin films combining two or more unique properties are promising for multifunctional electronic devices. So far, BiFeO3 (BFO)-CoFe2O4 (CFO) nanocomposite thin films in which the ferromagnetic CFO pillar is embedded in a ferroelectric BFO matrix have been extensively studied. However, critical issues in BFO-CFO nanocomposites limited their utilities in electronic devices. Fabrication of stoichiometric BFO is difficult due to the Bi volatilization during the high temperature processing. Non-stoichiometric BFO leads to significant leakage current originating from defects and oxygen vacancies. On the other hands, it is necessary to reduce the switching field in magnetic CFO in order to produce a low power consumption memory device. As an alternative for BFO-CFO, we introduce a new composite consisting of insulating BaTiO3 (BTO) and low-field switching Y3Fe5O12 (YIG) using radio frequency (RF) magnetron sputtering on SrTiO3 (001) substrates. Then we investigated its structural, magnetic, and electric properties using X-ray diffraction (XRD), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). Furthermore, we show the modulation of magnetic hysteresis loops exhibiting two different switching fields which enables the fabrication of multi-bit data storing devices. |
| 저자 | Jeong Heum Mun1, Hyun Kyu Jung2, HanJin Lee3, Dong Hun Kim4 |
| 소속 | 1Department of Materials Science and Engineering, 2Myongji Univ., 3Yongin, 4Republic of Korea |
| 키워드 | Composite thin film; Multifunctional oxide; RF sputtering; Magnetic; Ferroelectric |
