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Increase of temperature due to Joule heating during current-induced magnetization switching of an MgO-based magnetic tunnel junction

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2 Author(s)
Lee, D.H. ; Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea ; Lim, S.H.

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Three-dimensional numerical calculations based on the finite element method are performed to calculate the increase of temperature caused by Joule heating during the current-induced magnetization switching of an MgO-based magnetic tunnel junction. The increase of temperature is found to be significantly large (the maximum being 145 K) at critical conditions for the current-induced magnetization switching. The temperature increase also differs greatly, depending on the critical condition, requiring a correction in calculating the thermal stability parameter using the Slonczewski equation. After the correction, the thermal stability parameter increases substantially from 67 to 76.

Published in:

Applied Physics Letters  (Volume:92 ,  Issue: 23 )