Effects of exchange bias on magnetotransport in permalloy kagome artificial spin ice

B. L. Le, D. W. Rench, R. Misra, L. O'Brien, C. Leighton, N. Samarth, P. Schiffer

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We investigate the magnetotransport properties of connected kagome artificial spin ice networks composed of permalloy nanowires. Our data show clear evidence of magnetic switching among the wires, both in the longitudinal and transverse magnetoresistance. An unusual asymmetry with field sweep direction appears at temperatures below about 20 K that appears to be associated with exchange bias resulting from surface oxidation of permalloy, and which disappears in alumina-capped samples. These results demonstrate that exchange bias is a phenomenon that must be considered in understanding the physics of such artificial spin ice systems, and that opens up new possibilities for their control.

Original languageEnglish (US)
Article number023047
JournalNew Journal of Physics
Volume17
DOIs
StatePublished - Feb 13 2015

Fingerprint

Permalloys (trademark)
ice
magnetic switching
nanowires
aluminum oxides
asymmetry
wire
oxidation
physics
temperature

Keywords

  • artificial spin ice
  • exchange bias
  • magnetotransport

Cite this

Effects of exchange bias on magnetotransport in permalloy kagome artificial spin ice. / Le, B. L.; Rench, D. W.; Misra, R.; O'Brien, L.; Leighton, C.; Samarth, N.; Schiffer, P.

In: New Journal of Physics, Vol. 17, 023047, 13.02.2015.

Research output: Contribution to journalArticle

Le, B. L. ; Rench, D. W. ; Misra, R. ; O'Brien, L. ; Leighton, C. ; Samarth, N. ; Schiffer, P. / Effects of exchange bias on magnetotransport in permalloy kagome artificial spin ice. In: New Journal of Physics. 2015 ; Vol. 17.
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