skip to main content

DOE PAGESDOE PAGES

Title: Understanding magnetotransport signatures in networks of connected permalloy nanowires

The change in electrical resistance associated with the application of an external magnetic field is known as the magnetoresistance (MR). The measured MR is quite complex in the class of connected networks of single-domain ferromagnetic nanowires, known as “artificial spin ice,” due to the geometrically induced collective behavior of the nanowire moments. Here, we have conducted a thorough experimental study of the MR of a connected honeycomb artificial spin ice, and we present a simulation methodology for understanding the detailed behavior of this complex correlated magnetic system. Finally, our results demonstrate that the behavior, even at low magnetic fields, can be well described only by including significant contributions from the vertices at which the legs meet, opening the door to new geometrically induced MR phenomena.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [5] ;  [5] ;  [4] ;  [1]
  1. Univ. of Illinois, Urbana, IL (United States). Dept. of Physics. Frederick Seitz Materials Research Lab.
  2. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Physics
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Chemical Engineering and Materials Science
  5. Pennsylvania State Univ., University Park, PA (United States). Dept. of Physics. Materials Research Inst.
Publication Date:
Report Number(s):
LA-UR-18-29680
Journal ID: ISSN 2469-9950
Grant/Contract Number:
AC52-06NA25396; SC0010778; DMR-1420013; DMR-1507048
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Illinois at Urbana-Champaign, IL (United States); Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; anisotropic magnetoresistance; frustrated magnetism; honeycomb lattice; spin ice; magnetization measurements; micromagnetic modeling
OSTI Identifier:
1480009
Alternate Identifier(s):
OSTI ID: 1343335

Le, B. L., Park, J., Sklenar, J., Chern, G. -W., Nisoli, C., Watts, J. D., Manno, M., Rench, D. W., Samarth, N., Leighton, C., and Schiffer, P.. Understanding magnetotransport signatures in networks of connected permalloy nanowires. United States: N. p., Web. doi:10.1103/PhysRevB.95.060405.
Le, B. L., Park, J., Sklenar, J., Chern, G. -W., Nisoli, C., Watts, J. D., Manno, M., Rench, D. W., Samarth, N., Leighton, C., & Schiffer, P.. Understanding magnetotransport signatures in networks of connected permalloy nanowires. United States. doi:10.1103/PhysRevB.95.060405.
Le, B. L., Park, J., Sklenar, J., Chern, G. -W., Nisoli, C., Watts, J. D., Manno, M., Rench, D. W., Samarth, N., Leighton, C., and Schiffer, P.. 2017. "Understanding magnetotransport signatures in networks of connected permalloy nanowires". United States. doi:10.1103/PhysRevB.95.060405. https://www.osti.gov/servlets/purl/1480009.
@article{osti_1480009,
title = {Understanding magnetotransport signatures in networks of connected permalloy nanowires},
author = {Le, B. L. and Park, J. and Sklenar, J. and Chern, G. -W. and Nisoli, C. and Watts, J. D. and Manno, M. and Rench, D. W. and Samarth, N. and Leighton, C. and Schiffer, P.},
abstractNote = {The change in electrical resistance associated with the application of an external magnetic field is known as the magnetoresistance (MR). The measured MR is quite complex in the class of connected networks of single-domain ferromagnetic nanowires, known as “artificial spin ice,” due to the geometrically induced collective behavior of the nanowire moments. Here, we have conducted a thorough experimental study of the MR of a connected honeycomb artificial spin ice, and we present a simulation methodology for understanding the detailed behavior of this complex correlated magnetic system. Finally, our results demonstrate that the behavior, even at low magnetic fields, can be well described only by including significant contributions from the vertices at which the legs meet, opening the door to new geometrically induced MR phenomena.},
doi = {10.1103/PhysRevB.95.060405},
journal = {Physical Review B},
number = 6,
volume = 95,
place = {United States},
year = {2017},
month = {2}
}