Research Data Leeds Repository

Citation

Morley, Sophie A. and Riley, Susan T. and Porro, Jose M. and Rosamond, Mark C. and Linfield, Edmund and Cunningham, John and Langridge, Sean and Marrows, Christopher H. (2017) Data associated with 'Effect of FePd alloy composition on the dynamics of artificial spin ice'. University of Leeds. [Dataset] https://doi.org/10.5518/298

Dataset description

Artificial spin ices (ASI) are arrays of single domain nano-magnetic islands, arranged in geometries that give rise to frustrated magnetostatic interactions. It is possible to reach their ground state via thermal annealing. We have made square ASI using different FePd alloys to vary the magnetization via co-sputtering. From a polarized state the samples were incrementally heated and we measured the vertex population as a function of temperature using magnetic force microscopy. For the higher magnetization FePd sample, we report an onset of dynamics at $T = 493$ K, with a rapid collapse into $>90\%$ ground state vertices. In contrast, the low magnetization sample started to fluctuate at lower temperatures, $T = 393$ K and over a wider temperature range but only reached a maximum of $25\%$ of ground state vertices. These results indicate that the interaction strength, dynamic temperature range and pathways can be finely tuned using a simple co-sputtering process. In addition we have compared our experimental values of the blocking temperature to those predicted using the simple N\'{e}el-Brown two-state model and find a large discrepancy which we attribute to activation volumes much smaller than the island volume.

Subjects:	F000 - Physical sciences > F300 - Physics > F320 - Chemical physics > F321 - Solid-state physics
Divisions:	Faculty of Engineering and Physical Sciences > School of Electronic and Electrical Engineering Faculty of Engineering and Physical Sciences > School of Physics and Astronomy
Related resources:	Location Type https://arxiv.org/abs/1712.02404 Publication https://eprints.whiterose.ac.uk/125077/ Publication https://doi.org/10.1038/s41598-018-23208-6 Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	29 Jan 2018 15:43
URI:	https://archive.researchdata.leeds.ac.uk/id/eprint/308
Additional details Additional details Creators or authors: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Morley, Sophie A. https://orcid.org/0000-0001-8197-2431 University of California, Santa Cruz https://ror.org/03s65by71 ror Riley, Susan T. University of Leeds https://ror.org/024mrxd33 ror Porro, Jose M. https://orcid.org/0000-0002-8610-9802 Rutherford Appleton Laboratory https://ror.org/03gq8fr08 ror Rosamond, Mark C. University of Leeds https://ror.org/024mrxd33 ror Linfield, Edmund https://orcid.org/0000-0001-6912-0535 University of Leeds https://ror.org/024mrxd33 ror Cunningham, John https://orcid.org/0000-0002-1805-9743 University of Leeds https://ror.org/024mrxd33 ror Langridge, Sean https://orcid.org/0000-0003-1104-0772 Rutherford Appleton Laboratory https://ror.org/03gq8fr08 ror Marrows, Christopher H. https://orcid.org/0000-0003-4812-6393 University of Leeds https://ror.org/024mrxd33 ror Type of data: Dataset Research funders: EPSRC Grant numbers: EP/L00285X/1 Publication date: 2017 Resource language: English Metadata language: English Research project title: Artificial Spin Ice: Designer Matter Far From Equilibrium Publisher: University of Leeds Contact email: c.h.marrows@leeds.ac.uk Last Modified: 03 Sep 2024 11:23

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Data

Magnetometry Data for Figure 1 [951kB] Magnetometry Data for Figure 1 [951kB] Magnetometry Data for Figure 1 [951kB] Security: Anyone File name: Figure1.zip Content type: Data Mime-Type: application/zip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 951kB

Magnetic Force Microscopy Images for Figure 2 [3MB] Magnetic Force Microscopy Images for Figure 2 [3MB] Magnetic Force Microscopy Images for Figure 2 [3MB] Security: Anyone File name: Figure2.zip Content type: Data Mime-Type: application/zip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 3MB

Magnetic Force Microscopy Images for Figure 3 [18MB] Magnetic Force Microscopy Images for Figure 3 [18MB] Magnetic Force Microscopy Images for Figure 3 [18MB] Security: Anyone File name: Figure3.zip Content type: Data Mime-Type: application/zip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 18MB

Magnetic Force Microscopy Images for Figure 4 [21MB] Magnetic Force Microscopy Images for Figure 4 [21MB] Magnetic Force Microscopy Images for Figure 4 [21MB] Security: Anyone File name: Figure4.zip Content type: Data Mime-Type: application/zip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 21MB

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