# Current-Induced Microwave Excitation of a Domain Wall Pinned in a Magnetic Wire with Bi-Axial Anisotropy

@article{Matsushita2009CurrentInducedME, title={Current-Induced Microwave Excitation of a Domain Wall Pinned in a Magnetic Wire with Bi-Axial Anisotropy}, author={Katsuyoshi Matsushita and Jun Sato and Hiroshi Imamura}, journal={Journal of the Physical Society of Japan}, year={2009}, volume={78}, pages={093801} }

We studied the current-induced magnetization dynamics of a domain wall pinned geometrically in a magnetic wire with bi-axial anisotropy. We showed that above the threshold current density, breathing-mode excitation, where the thickness of the domain wall oscillates, is induced by spin-transfer torque. We found that the breathing-mode can be applied as a source of microwave oscillation because the resistance of the domain wall is a function of the domain wall thickness. In a current sweep…

## 10 Citations

AC-Driven Breathing Mode of Confined Magnetic Domain Wall

- Physics
- 2012

We theoretically clarified the properties of ac-driven breathing modes of a confined magnetic domain wall. By numerically solving equations of motion for the domain wall, we found three…

Design of Domain Wall Spin Torquemeter

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We investigate an AC-driven oscillation of a domain wall in a one-dimensional clean ferromagnetic wire in order to design an effective domain wall spin torquemeter. The amplitude of the oscillation…

Possible method to observe the breathing mode of a magnetic domain wall in the Josephson junction.

- PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2014

A magnetic domain wall (DW) behaves as a massive particle with elasticity. Sliding and oscillation of the DW have been observed experimentally, whereas vibration of a width in the DW, "breathing…

Current-driven transverse domain wall oscillations in perpendicular spin-valve structures

- Physics
- 2020

Spin-transfer-driven oscillations of a transverse domain wall confined to a perpendicular spin-valve structure are investigated using a one-dimensional model. The stack consists of a polarizer,…

Microwave Generation on Geometrically Constrained Magnetic Wall: Effect of Twist Angle

- Physics
- 2010

We studied the current-induced magnetization dynamics of geometrically constrained magnetic walls (GCMWs) with twist angles of 90–180°, in order to examine their possibility as microwave generators…

Penetration of a magnetic wall into thin ferromagnetic electrodes of a nano-contact spin valve

- Physics
- 2013

We theoretically analyzed a magnetic wall confined in a nano-contact spin valve paying special attention to the penetration of the magnetic wall into thin ferromagnetic electrodes. We showed that,…

Domain wall motion driven by adiabatic spin transfer torque through excitation of nonlinear dynamics.

- PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2016

It was found that a microwave-assisted steady domain wall motion driven by adiabatic spin transfer torque can be adequately described by three domain wall collective coordinates.

Thermal stability of the geometrically constrained magnetic wall and its effect on a domain-wall spin valve

- Physics
- 2012

We studied thermal fluctuations in magnetoresistance (MR) signals originating from geometrically confined magnetic walls (GCMWs) of nanometer size. To this end, we developed a novel numerical…

Chaos in AC-Driven Motion of Confined Magnetic Domain Wall

- Physics
- 2012

We examined ac-driven motion of a confined magnetic domain wall for its time periodicity in order to explore current-induced chaos of domain wall motion. It is known that the motion is a time…

Swing Casting Boost for Confined Domain Wall Breathing

- Physics
- 2014

A steady breathing mode excitation of the confined domain wall under dc is a candidate signal source in future telecommunication devices. The breathing mode exhibits a non-linear response to dc with…

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