Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 321, Issue 21, Pages 3589-3594Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2009.06.076
Keywords
Current induced magnetization switching; Spin transfer torque; MRAM; Nanopillar
Funding
- KOSEF [R01-2007-000-20281-0]
- Ministry of ScienceTechnology [2008-02553]
- National Research Foundation of Korea [R01-2007-000-20281-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The temperature increment due to the Joule heating in a nanopillar spin transfer torque system is investigated. We obtain a time-dependent analytic solution of the heat conduction equation in nanopillar geometry by using the Green's function method after some simplifications of the problem. While Holm's equation is applicable only to steady states in metallic systems, our solution describes the time dependence and is also applicable to a nanopillar-shaped magnetic tunneling junction with an insulator barrier layer. The validity of the analytic solution is confirmed by numerical finite element method simulations and by the comparison with Holm's equation. (C) 2009 Elsevier B.V. All rights reserved.
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