Original Publication Date
Applied Physics Letters
DOI of Original Publication
Date of Submission
We predict the existence of a metastable magnetization state in a single-domain nanomagnet with uniaxial shape anisotropy. It emerges when a spin-polarized current, which delivers a spin-transfer-torque possessing a field-like component, is injected into the nanomagnet. At a metastable state, the internal torque due to nanomagnet's shape anisotropy cancels the externally applied spin-transfer-torque and hence the nettorque acting on the magnetization becomes zero. Therefore, it prevents spin-transfer-torque from switching the magnetization from one stable state along the easy axis to the other, even in the presence of room-temperature thermal fluctuations.
Roy, K., Bandyopadhyay, S., and Atulasimha, J. Metastable state in a shape-anisotropic single-domain nanomagnet subjected to spin-transfer-torque. Applied Physics Letters, 101, 162405 (2012). Copyright © 2012 AIP Publishing LLC.
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VCU Electrical and Computer Engineering Publications