In analogy to charge in conventional circuitry, magnetic domain walls provide an alternative medium for encoding digital information. The authors exploit the lateral coupling between out-of-plane and in-plane regions induced by interfacial Dzyaloshinskii-Moriya interaction thin films realize both field- current-driven domain-wall inverters. Nonreciprocity transport is introduced breaking symmet...

An investigation of the orientation and temperature dependence of domain wall properties in FePt is presented. The authors use a microscopic, atomic model for the magnetic interactions within an effective, classical spin Hamiltonian constructed on the basis of spin-density functional calculations. They find a significant dependence of the domain wall width as well as the domain wall energy on t...

Using photoemission electron microscopy, we image the dynamics of a field pulse excited domain wall in a Permalloy nanowire. We find a delay in the onset of the wall motion with respect to the excitation and an oscillatory relaxation of the domain wall back to its equilibrium position, defined by an external magnetic field. The origin of both of these inertia effects is the transfer of energy b...

In magnetic random access memory (MRAM), power consumption depends on the coercivity of the magnetic elements in the memory cells. In this paper a new method is described that uses a “domain wall trap” element shape to reduce both the coercivity and the dependence of coercivity on element size in submicron magnetic elements. Micromagnetic simulations of a shaped Permalloy element show coercivit...

Dislocations affect the magnetic properties of ferromagnetic materials by pinning the domain walls. The primary mechanism is interaction between the stress fields of dislocation and domain walls. Using magnetic nondestructive methods, namely the acoustic Barkhausen noise (AB), magnetic Barkhausen noise (MB), and the hysteresis curves, we have studied these interactions. The three measurements g...

Title of Dissertation: Domain Wall Engineering of Nanoscale Ferromagnetic Elements and its Application for Memory Devices Sylvia H. Flórez, Doctor of Philosophy, 2006 Dissertation directed by: Professor R.D. Gomez Department of Electrical and Computer Engineering This thesis concerns the interaction of spin polarized electrons with the local magnetic moments in nanopatterned metallic systems. W...