publication . Preprint . 2012

Dependence of the Spin Transfer Torque Switching Current Density on the Exchange Stiffness Constant

You, Chun-Yeol;
Open Access English
  • Published: 01 Jun 2012
Abstract
We investigate the dependence of the switching current density on the exchange stiffness constant in the spin transfer torque magnetic tunneling junction structure with micromagnetic simulations. Since the widely accepted analytic expression of the switching current density is based on the macro-spin model, there is no dependence of the exchange stiffness constant. When the switching is occurred, however, the spin configuration forms C-, S-type, or complicated domain structures. Since the spin configuration is determined by the shape anisotropy and the exchange stiffness constant, the switching current density is very sensitive on their variations. It implies th...
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free text keywords: Condensed Matter - Materials Science
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