Interdimensional universality of dynamic interfaces

Title
Interdimensional universality of dynamic interfaces
Authors
김갑진이재철안성민이강수이창원조영진서순애신경호최석봉이현우
Keywords
domain wall; ferromagnetic nanowire
Issue Date
2009-04
Publisher
Nature
Citation
VOL 458, NO 9, 740-742
Abstract
Despite the complexity and diversity of nature, there exists universality in the form of critical scaling laws among various dissimilar systems and processes such as stock markets1, earthquakes2, crackling noise3, lung inflation4 and vortices in superconductors5. This universality is mainly independent of the microscopic details, depending only on the symmetry and dimension of the system. Exploring how universality is affected by the system dimensions is an important unresolved problem. Here we demonstrate experimentally that universality persists even at a dimensionality crossover in ferromagnetic nanowires. As the wire width decreases, the magnetic domain wall dynamics changes from elastic creep6–9 in two dimensions to a particle-like stochastic behaviour10 in one dimension. Applying finite-size scaling, we find that all our experimental data in one and two dimensions (including the crossover regime) collapse onto a single curve, signalling universality at the criticality transition. The crossover to the one-dimensional regime occurs at a few hundred nanometres, corresponding to the integration scale for modern nanodevices.
URI
http://pubs.kist.re.kr/handle/201004/35168
ISSN
0028-0836
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE