Fractal spin structures as origin of 1/f magnetic noise in superconducting circuits
Mesoscale and Nanoscale Physics
2011-02-18 v1 Disordered Systems and Neural Networks
Abstract
We analyze recent data on the complex inductance of dc SQUIDs that show 1/f inductance noise highly correlated with conventional 1/f flux noise. We argue that these data imply a formation of long range order in fractal spin structures. We show that these structures appear naturally in a random system of spins with wide distribution of spin-spin interactions. We perform numerical simulations on the simplest model of this type and show that it exhibits magnetization noise with small exponent and reproduces the correlated behavior observed experimentally.
Keywords
Cite
@article{arxiv.1102.3445,
title = {Fractal spin structures as origin of 1/f magnetic noise in superconducting circuits},
author = {K. Kechedzhi and L. Faoro and L. B. Ioffe},
journal= {arXiv preprint arXiv:1102.3445},
year = {2011}
}