Metastable state in a shape-anisotropic single-domain nanomagnet subjected to spin-transfer-torque

Details Metastable state in a shape-anisotropic single-domain nanomagnet subjected to spin-transfer-torque Metastable state in a shape-anisotropic single-domain nanomagnet subjected to spin-transfer-torque

2011-06-06

arxiv.org/abs/1106.1215v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We predict the existence of a new metastable magnetization state in a single-domain nanomagnet with uniaxial shape anisotropy. It emerges when a spin-polarized current, delivering a spin-transfer-torque, is injected into the nanomagnet. It can trap the magnetization vector and prevent spin-transfer-torque from switching the magnetization from one stable state along the easy axis to the other. Above a certain threshold current, the metastable state no longer appears. This has important technological consequences for spin-transfer-torque based magnetic memory and logic systems.

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