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.

doi:10.1088/1367-2630/17/2/023047

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

Journal Article · Sun Feb 01 00:00:00 EST 2015 · New Journal of Physics

DOI:https://doi.org/10.1088/1367-2630/17/2/023047· OSTI ID:1341480

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

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.

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Research Organization:: Univ. of Illinois at Urbana-Champaign, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0010778

OSTI ID:: 1341480

Alternate ID(s):: OSTI ID: 1194166

Journal Information:: New Journal of Physics, Journal Name: New Journal of Physics Vol. 17 Journal Issue: 2; ISSN 1367-2630

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 18 works

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36 MATERIALS SCIENCE
artificial spin ice
exchange bias
magnetotransport

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

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