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Magnetic Nano- and Microwires by Manuel Vázquez

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10

Spin Hall torque–driven chiral domain walls in magnetic heterostructures

J. Torrejon1,2; M. Hayashi1    1 National Institute for Materials Science, Tsukuba, Japan2 Unité Mixte de Physique CNRS/Thales, Palaiseau, France

Abstract

The motion of magnetic domain walls in ultrathin magnetic heterostructures driven by current via the spin Hall torque is described in this chapter. We show results from perpendicularly magnetized CoFeB/MgO heterostructures with various heavy metal underlayers. The domain wall moves along or against the current flow, depending on the underlayer material. The direction in which the domain wall moves is associated with the chirality of the domain wall spiral formed in these heterostructures. A one-dimensional model ...

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