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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.6
- 수록면
- 140 - 144 (5page)
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초록· 키워드
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We report on a numerical calculation study of two new functional properties in magnetic tunnel junctions (MTJs), negative dynamic resistance and RF amplification. The magnetic dynamics in a conventional CoFeB/MgO/CoFeB MTJ with in-plane magnetization was investigated using a macro-spin model simulation. To examine the influence of thermal fluctuations, random external magnetic fields were also included. Using a voltage controlled bias circuit, the negative dynamic resistance was obtained from time averaged Ⅰ-Ⅴ characteristics at both 0 K and 300 K under appropriate external magnetic fields and bias voltages. Using this negative dynamic resistance property, we demonstrated RF amplification with a 100 ㎒ high frequency signal. Sizable RF amplification gain was observed without thermal fluctuation. However, at 300 K, the RF signal was not amplified because low frequency magnetization dynamics were dominant.
목차
1. Introduction
2. The Mechanism of Negative Dynamic Resistance and Amplification
3. Calculation Method
4. Results and Discussion
5. Conclusion
Acknowledgements
References
참고문헌 (19)
참고문헌 신청
1. [학술지(정기간행물)] - T. Miyazaki / 1995 / / J. Magn. Magn. Mater 139 : L231 ~
2. [학술지(정기간행물)] - J. S. Moodera / 1995 / / Phys. Rev. Lett 74 : 3273 ~
3. [학술지(정기간행물)] - S. Yuasa / 2004 / / Nat. Mater 3 : 868 ~
4. [학술지(정기간행물)] - S. S. Parkin / 2004 / / Nat. Mater 3 : 862 ~
5. [학술지(정기간행물)] - J. C. Slonczewski / 1996 / 159 : L1 ~
2. [학술지(정기간행물)] - J. S. Moodera / 1995 / / Phys. Rev. Lett 74 : 3273 ~
3. [학술지(정기간행물)] - S. Yuasa / 2004 / / Nat. Mater 3 : 868 ~
4. [학술지(정기간행물)] - S. S. Parkin / 2004 / / Nat. Mater 3 : 862 ~
5. [학술지(정기간행물)] - J. C. Slonczewski / 1996 / 159 : L1 ~
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UCI(KEPA) : I410-ECN-0101-2013-428-000554253