Differential Domain Wall Propagation in Y-Shaped Permalloy Nanowire Devices

Bipul Das, Ting Chieh Chen, Deng Shiang Shiu, Lance Horng, Jong-Ching Wu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Here, we report an investigation of magnetic domain wall (DW) evolution and propagation in Y-shaped permalloy (Py) nanowire (NW) devices. The devices are fabricated using standard electron-beam lithography technique. Each device consists of three connected NWs that form a Y-junction structure with one branch connecting either symmetrically or asymmetrically to a circular disk for DW nucleation. The DW dynamics in the devices are studied by in situ magnetic force microscopy (MFM) by pinning the DWs to triangular notches at each branch of the two devices. We observe that the DW injection field values differ depending on whether they are connected to the circular disks symmetrically or asymmetrically. However, after they pass the Y-junctions, a selection is made by the DWs to propagate easily either through both or through only one particular outgoing branch of the devices. The experimental observations are analyzed by micromagnetic simulation. It can be inferred from the results that the influence of detailed geometrical shape of the devices leads to significantly different interactions among the innate topological defects and the notches with the injected DWs.

Original languageEnglish
Article number1650006
JournalSPIN
Volume6
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

Domain walls
Permalloys (trademark)
Nanowires
domain wall
nanowires
propagation
Magnetic force microscopy
Magnetic domains
notches
Electron beam lithography
Nucleation
magnetic force microscopy
Defects
magnetic domains
lithography
nucleation
electron beams
injection
defects

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Das, Bipul ; Chen, Ting Chieh ; Shiu, Deng Shiang ; Horng, Lance ; Wu, Jong-Ching. / Differential Domain Wall Propagation in Y-Shaped Permalloy Nanowire Devices. In: SPIN. 2016 ; Vol. 6, No. 1.
@article{3c2623319cac4c58b3f4d34d432f34dc,
title = "Differential Domain Wall Propagation in Y-Shaped Permalloy Nanowire Devices",
abstract = "Here, we report an investigation of magnetic domain wall (DW) evolution and propagation in Y-shaped permalloy (Py) nanowire (NW) devices. The devices are fabricated using standard electron-beam lithography technique. Each device consists of three connected NWs that form a Y-junction structure with one branch connecting either symmetrically or asymmetrically to a circular disk for DW nucleation. The DW dynamics in the devices are studied by in situ magnetic force microscopy (MFM) by pinning the DWs to triangular notches at each branch of the two devices. We observe that the DW injection field values differ depending on whether they are connected to the circular disks symmetrically or asymmetrically. However, after they pass the Y-junctions, a selection is made by the DWs to propagate easily either through both or through only one particular outgoing branch of the devices. The experimental observations are analyzed by micromagnetic simulation. It can be inferred from the results that the influence of detailed geometrical shape of the devices leads to significantly different interactions among the innate topological defects and the notches with the injected DWs.",
author = "Bipul Das and Chen, {Ting Chieh} and Shiu, {Deng Shiang} and Lance Horng and Jong-Ching Wu",
year = "2016",
month = "1",
day = "1",
doi = "10.1142/S2010324716500065",
language = "English",
volume = "6",
journal = "SPIN",
issn = "2010-3247",
publisher = "World Scientific Publishing Co. Pte Ltd",
number = "1",

}

Differential Domain Wall Propagation in Y-Shaped Permalloy Nanowire Devices. / Das, Bipul; Chen, Ting Chieh; Shiu, Deng Shiang; Horng, Lance; Wu, Jong-Ching.

In: SPIN, Vol. 6, No. 1, 1650006, 01.01.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Differential Domain Wall Propagation in Y-Shaped Permalloy Nanowire Devices

AU - Das, Bipul

AU - Chen, Ting Chieh

AU - Shiu, Deng Shiang

AU - Horng, Lance

AU - Wu, Jong-Ching

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Here, we report an investigation of magnetic domain wall (DW) evolution and propagation in Y-shaped permalloy (Py) nanowire (NW) devices. The devices are fabricated using standard electron-beam lithography technique. Each device consists of three connected NWs that form a Y-junction structure with one branch connecting either symmetrically or asymmetrically to a circular disk for DW nucleation. The DW dynamics in the devices are studied by in situ magnetic force microscopy (MFM) by pinning the DWs to triangular notches at each branch of the two devices. We observe that the DW injection field values differ depending on whether they are connected to the circular disks symmetrically or asymmetrically. However, after they pass the Y-junctions, a selection is made by the DWs to propagate easily either through both or through only one particular outgoing branch of the devices. The experimental observations are analyzed by micromagnetic simulation. It can be inferred from the results that the influence of detailed geometrical shape of the devices leads to significantly different interactions among the innate topological defects and the notches with the injected DWs.

AB - Here, we report an investigation of magnetic domain wall (DW) evolution and propagation in Y-shaped permalloy (Py) nanowire (NW) devices. The devices are fabricated using standard electron-beam lithography technique. Each device consists of three connected NWs that form a Y-junction structure with one branch connecting either symmetrically or asymmetrically to a circular disk for DW nucleation. The DW dynamics in the devices are studied by in situ magnetic force microscopy (MFM) by pinning the DWs to triangular notches at each branch of the two devices. We observe that the DW injection field values differ depending on whether they are connected to the circular disks symmetrically or asymmetrically. However, after they pass the Y-junctions, a selection is made by the DWs to propagate easily either through both or through only one particular outgoing branch of the devices. The experimental observations are analyzed by micromagnetic simulation. It can be inferred from the results that the influence of detailed geometrical shape of the devices leads to significantly different interactions among the innate topological defects and the notches with the injected DWs.

UR - http://www.scopus.com/inward/record.url?scp=85059858351&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059858351&partnerID=8YFLogxK

U2 - 10.1142/S2010324716500065

DO - 10.1142/S2010324716500065

M3 - Article

AN - SCOPUS:85059858351

VL - 6

JO - SPIN

JF - SPIN

SN - 2010-3247

IS - 1

M1 - 1650006

ER -