| 학회 |
한국재료학회 |
| 학술대회 |
2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 |
23권 1호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Effect of laser irradiation on the thermal gradient of CoFeB ultrathin magnetic layers |
| 초록 |
Laser irradiated CoFeB ultrathin magnetic layers have been theoretically investigated for the temperature profile distribution by combining the finite difference time domain (FDTD) and finite element method (FEM) to study the spin Seebeck effect (SSE). Since, the thermal conductivity (k) of the materials is a thickness dependent parameter which varies significantly from the bulk value in ultra-thin dimensions, effects the variation of ∇T in that dominion considerably. Measurement of ∇T is very complex in the realm of ultra-thin dimensions of the magnetic layers with LASER driven heat sources. Recently, optical constants of CoFeB thin films2 have been reported and with reference to that, in this work, we formulated the theoretical study model combining the FDTD – optical, and COMSOL (FEM) – heat transfer simulation study which is experimentally supported by maintaining the conditions through the LASER irradiation on CoFeB of thickness ranging from 1~40 nm on SiO2 substrate at the wavelength of 660nm. The individual effect of material parameters like absorption coefficient (α), thermal conductivity (k) as function of thickness (t) on the variation of ∇T in ultra-thin magnetic layers has been investigated and other observations are being reported along with experimental evidences. |
| 저자 |
Srivathsava Surabhi1, Phuoc CAOVAN2, D.-J. Kim1, B.-G. Park2, Jong-Ryul Jeong1
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| 소속 |
1Department of Materials Science and Engineering, 2Chungnam National Univ. |
| 키워드 |
Spin Seebeck effect; thermal gradient; FDTD; FEM
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| E-Mail |
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