Controlling and Manipulating Nanomagnets with DC Spin-polarized Currents
In conventional magnetic devices and measurements, the magnetization states of the elements are controlled with applied magnetic fields, which are applied using another magnet or through the field generated by a current-carrying wire. However, over the last several years it has been shown that the angular momentum in a dc spin-polarized current can also be used to control the magnetization state of thin ferromagnetic materials, through the so-called "spin-transfer interaction." This effect is based on the transfer of angular momentum from a spin-polarized current to a ferromagnetic material and represents a fundamentally new way to manipulate magnetism. The researchers will give an introduction to the spin transfer effect and a general overview of our work using the spin transfer interaction to induce high-speed switching and coherent high-frequency (GHz) precession in magnetic nanostructures.
|NRI e-Workshop Series: Nanoelectronics at the National Institute of Standards and Technology|
Tuesday, Feb. 5, 2008, 4 p.m.–5:30 p.m. ET
Research Triangle Park, NC, United States