Demagnetization protocols for frustrated interacting nanomagnet arrays

R. F. Wang; J. Li; W. McConville; C. Nisoli; X. Ke; J. W. Freeland; V. Rose; M. Grimsditch; P. Lammert; V. H. Crespi; P. Schiffer

doi:10.1063/1.2712528

Demagnetization protocols for frustrated interacting nanomagnet arrays

R. F. Wang, J. Li, W. McConville, C. Nisoli, X. Ke, J. W. Freeland, V. Rose, M. Grimsditch, P. Lammert, V. H. Crespi, P. Schiffer

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61 Scopus citations

Abstract

We report a study of demagnetization protocols for frustrated arrays of interacting single-domain permalloy nanomagnets by rotating the arrays in a changing magnetic field. The most effective demagnetization is achieved by not only stepping the field strength down while the sample is rotating, but also by combining each field step with alternation in the field direction. By contrast, linearly decreasing the field strength or stepping the field down without alternating the field direction leaves the arrays with a larger remanent magnetic moment. These results suggest that nonmonotonic variations in field magnitude around and below the coercive field are important for the demagnetization process.

Original language	English (US)
Article number	09J104
Journal	Journal of Applied Physics
Volume	101
Issue number	9
DOIs	https://doi.org/10.1063/1.2712528
State	Published - 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.2712528

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@article{1efbd58a4da549808ea7f13979e2e2b4,

title = "Demagnetization protocols for frustrated interacting nanomagnet arrays",

abstract = "We report a study of demagnetization protocols for frustrated arrays of interacting single-domain permalloy nanomagnets by rotating the arrays in a changing magnetic field. The most effective demagnetization is achieved by not only stepping the field strength down while the sample is rotating, but also by combining each field step with alternation in the field direction. By contrast, linearly decreasing the field strength or stepping the field down without alternating the field direction leaves the arrays with a larger remanent magnetic moment. These results suggest that nonmonotonic variations in field magnitude around and below the coercive field are important for the demagnetization process.",

author = "Wang, {R. F.} and J. Li and W. McConville and C. Nisoli and X. Ke and Freeland, {J. W.} and V. Rose and M. Grimsditch and P. Lammert and Crespi, {V. H.} and P. Schiffer",

note = "Funding Information: We acknowledge the financial support from the Army Research Office, the PSU MRI Nanfab Network and the NSF Cooperative Agreement No. 0335765, NNIN, with Cornell University, and the National Science Foundation MRSEC program. Work at Argonne was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02–06CH11357. We are grateful for the sample preparation assistance from M. S. Lund and C. Leighton.",

year = "2007",

doi = "10.1063/1.2712528",

language = "English (US)",

volume = "101",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "9",

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TY - JOUR

T1 - Demagnetization protocols for frustrated interacting nanomagnet arrays

AU - Wang, R. F.

AU - Li, J.

AU - McConville, W.

AU - Nisoli, C.

AU - Ke, X.

AU - Freeland, J. W.

AU - Rose, V.

AU - Grimsditch, M.

AU - Lammert, P.

AU - Crespi, V. H.

AU - Schiffer, P.

N1 - Funding Information: We acknowledge the financial support from the Army Research Office, the PSU MRI Nanfab Network and the NSF Cooperative Agreement No. 0335765, NNIN, with Cornell University, and the National Science Foundation MRSEC program. Work at Argonne was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02–06CH11357. We are grateful for the sample preparation assistance from M. S. Lund and C. Leighton.

PY - 2007

Y1 - 2007

N2 - We report a study of demagnetization protocols for frustrated arrays of interacting single-domain permalloy nanomagnets by rotating the arrays in a changing magnetic field. The most effective demagnetization is achieved by not only stepping the field strength down while the sample is rotating, but also by combining each field step with alternation in the field direction. By contrast, linearly decreasing the field strength or stepping the field down without alternating the field direction leaves the arrays with a larger remanent magnetic moment. These results suggest that nonmonotonic variations in field magnitude around and below the coercive field are important for the demagnetization process.

AB - We report a study of demagnetization protocols for frustrated arrays of interacting single-domain permalloy nanomagnets by rotating the arrays in a changing magnetic field. The most effective demagnetization is achieved by not only stepping the field strength down while the sample is rotating, but also by combining each field step with alternation in the field direction. By contrast, linearly decreasing the field strength or stepping the field down without alternating the field direction leaves the arrays with a larger remanent magnetic moment. These results suggest that nonmonotonic variations in field magnitude around and below the coercive field are important for the demagnetization process.

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 9

M1 - 09J104

ER -

Demagnetization protocols for frustrated interacting nanomagnet arrays

Abstract

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