Noise in mesoscale magnetic dots from random telegraph noise to 1/f noise

Barry N. Costanzi, Daniel E. Endean, E. Dan Dahlberg

Research output: Contribution to journalArticlepeer-review


The noise in permalloy magnetic square shaped dots and chains of dots has been investigated. With the application of a magnetic field to control the energy barriers, individual dots exhibit random telegraph noise (RTN). The noise spectrum of chains of dots, the superposition of the RTN of individual dots, exhibits a 1/ ${f}$ noise spectrum.

Original languageEnglish (US)
Article number8456545
JournalIEEE Transactions on Magnetics
Issue number2
StatePublished - Feb 2019

Bibliographical note

Funding Information:
This work was supported in part by ONR under Grant N00014-11-1-0850 and in part by NSF under Grant DMR 1609782. Portions of this work were conducted in the Minnesota Nano Center, which is supported by the National Science Foundation through the National Nano Coordinated Infrastructure Network (NNCI) under Award ECCS-1542202.

Publisher Copyright:
© 1965-2012 IEEE.


  • 1/f noise
  • Magnetic noise
  • Mesoscale magnetic dots
  • Random telegraph noise (rtn)


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