| 학회 |
한국재료학회 |
| 학술대회 |
2010년 가을 (11/11 ~ 11/12, 무주리조트) |
| 권호 |
16권 2호 |
| 발표분야 |
B. Nano materials and processing Technology(나노소재기술) |
| 제목 |
A Giant Dielectric Constant of Nanostructured Dielectric Films Comprised of Self-Embedded Metal Nanocrystals at Room Temperature |
| 초록 |
The dielectric behaviour of ferroelectric-metal bulk composites has attracted much attention due to extra ordinary dielectric enhancement. A giant dielectric constant higher than that of the bulk material was observed in the Bi2Mg2/3Nb4/3O7 (BMNO)-Bi nano-composite films comprised of a bismuth nanocrystal (~ 10 nm mean size) self-embedded in the BMNO films grown at room temperature. The BMNO-Bi nano-composite films sandwiched between protective Al2O3 layers showed a dielectric constant (~ 220) that was greater than that of its bulk material (~ 210) with a low leakage current density of about 0.1μA/cm2. On the other hand, room-temperature grown nano-composite films sandwiched between 40-nm-thick BMNO layers exhibited a dielectric constant of about 480 and a leakage current density of 0.1μA/cm2 at 5 V. |
| 저자 |
정현준, 윤순길
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| 소속 |
충남대 |
| 키워드 |
BMNO-Bi composite films; Self-embedded Bi nanocrystal; rf sputtering; Al2O3 protection layer
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| E-Mail |
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