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

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.

Authors:
 [1];  [2];  [2];  [3];  [4];  [2];  [5]
  1. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  2. Pennsylvania State Univ., University Park, PA (United States)
  3. Univ. of Minnesota, Minneapolis, MN (United States); Univ. of Cambridge (United Kingdom). Cavendish Lab.
  4. Univ. of Minnesota, Minneapolis, MN (United States)
  5. Univ. of Illinois at Urbana-Champaign, Urbana, IL (US)
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1341480
Alternate Identifier(s):
OSTI ID: 1194166
Grant/Contract Number:  
SC0010778
Resource Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 17; Journal Issue: 2; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; artificial spin ice; exchange bias; magnetotransport

Citation Formats

Le, B. L., Rench, D. W., Misra, R., O’Brien, L., Leighton, C., Samarth, N., and Schiffer, P. Effects of exchange bias on magnetotransport in permalloy kagome artificial spin ice. United States: N. p., 2015. Web. doi:10.1088/1367-2630/17/2/023047.
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. United States. doi:10.1088/1367-2630/17/2/023047.
Le, B. L., Rench, D. W., Misra, R., O’Brien, L., Leighton, C., Samarth, N., and Schiffer, P. Sun . "Effects of exchange bias on magnetotransport in permalloy kagome artificial spin ice". United States. doi:10.1088/1367-2630/17/2/023047.
@article{osti_1341480,
title = {Effects of exchange bias on magnetotransport in permalloy kagome artificial spin ice},
author = {Le, B. L. and Rench, D. W. and Misra, R. and O’Brien, L. and Leighton, C. and Samarth, N. and Schiffer, P.},
abstractNote = {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.},
doi = {10.1088/1367-2630/17/2/023047},
journal = {New Journal of Physics},
number = 2,
volume = 17,
place = {United States},
year = {2015},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1088/1367-2630/17/2/023047

Citation Metrics:
Cited by: 8 works
Citation information provided by
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