| 학회 |
한국재료학회 |
| 학술대회 |
2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 |
17권 2호 |
| 발표분야 |
A. Information and Sensor Materials(정보소재 및 센서) |
| 제목 |
Ferroelectric and Magnetic Properties of Multiferroic BiFeO3-Ba(Cu1/3Nb2/3)O3 Ceramics |
| 초록 |
Multiferroic materials offer a wide opportunity for potential applications in information storage, such as spintronic devices and sensors, where both electric and magnetic polarizations can be coupled, giving enough opportunity for manipulating devices. In order to obtain the large coupling between electric properties and magnetic properties, materials should exhibit ferromagnetism and ferroelectricity simultaneously. Multiferroics BiFeO3 has been extensively investigated due to the high phase transition temperatures and room temperature characteristics. However, pure BiFeO3 could be prepared with difficulty owing to the second phase formation, which is extremely sensitive to the processing condition such as calcination and sintering processing. In addition, a major problem generally encountered in transport measurements is the high leakage current due to the low resistivity of the sample, which creates difficulties in the observation of the ferroelectric hysteresis loops. To achieve both the phase stability and high multiferroic performance, the composites of xBiFeO3-(1-x)Ba(Cu1/3Nb2/3)O3 were synthesized using conventional solid-state reaction method. The phases of various compositions were analyzed using x-ray diffraction and their electric and magnetic properties were characterized. The composition of 0.8BiFeO3-0.2Ba(Cu1/3Nb2/3)O3 ceramics showed comparatively high dielectric constant, clear ferroelectric polarization–electric field (P-E) loops and ferromagnetic properties compared with pure BiFeO3. |
| 저자 |
Chang-Woo Baek1, Jong-Pil Lee1, Yun-Soo Lim1, Kil-Dong Sung2, Jong-Hoon Jung3, Jung-Ho Ryu2, Dong-Soo Park3, Dae-Yong Jeong4
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| 소속 |
1Myongji Univ., 2Department of Physics, 3Inha Univ., 4Korea Institute of Materials Science (KIMS) |
| 키워드 |
Multiferroic; BiFeO3
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| E-Mail |
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