Imaging the stochastic microstructure and dynamic development of correlations in perpendicular artificial spin ice
Abstract
We use spatially resolved magneto-optical Kerr microscopy to track the complete microstates of arrays of perpendicular anisotropy nanomagnets during magnetization hysteresis cycles. These measurements, along with our statistical methodology, allow us to disentangle the intertwined effects of nearest-neighbor interactions, disorder, and stochasticity on magnetization switching. We find that the nearest-neighbor correlations depend on both interaction strength and disorder. We also find that although the global characteristics of the hysteretic switching are repeatable, the exact microstate sampled is stochastic with the behavior of individual islands varying between nominally identical runs. These protocols provide another way of understanding the relationship between macrohistory and microhistory in artificial magnetic arrays.
- Publication Date:
- Research Org.:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1580789
- Alternate Identifier(s):
- OSTI ID: 1594862
- Grant/Contract Number:
- SC0010778
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Research
- Additional Journal Information:
- Journal Name: Physical Review Research Journal Volume: 2 Journal Issue: 1; Journal ID: ISSN 2643-1564
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Kempinger, Susan, Fraleigh, Robert D., Lammert, Paul E., Zhang, Sheng, Crespi, Vincent H., Schiffer, Peter, and Samarth, Nitin. Imaging the stochastic microstructure and dynamic development of correlations in perpendicular artificial spin ice. United States: N. p., 2020.
Web. doi:10.1103/PhysRevResearch.2.012001.
Kempinger, Susan, Fraleigh, Robert D., Lammert, Paul E., Zhang, Sheng, Crespi, Vincent H., Schiffer, Peter, & Samarth, Nitin. Imaging the stochastic microstructure and dynamic development of correlations in perpendicular artificial spin ice. United States. https://doi.org/10.1103/PhysRevResearch.2.012001
Kempinger, Susan, Fraleigh, Robert D., Lammert, Paul E., Zhang, Sheng, Crespi, Vincent H., Schiffer, Peter, and Samarth, Nitin. Thu .
"Imaging the stochastic microstructure and dynamic development of correlations in perpendicular artificial spin ice". United States. https://doi.org/10.1103/PhysRevResearch.2.012001.
@article{osti_1580789,
title = {Imaging the stochastic microstructure and dynamic development of correlations in perpendicular artificial spin ice},
author = {Kempinger, Susan and Fraleigh, Robert D. and Lammert, Paul E. and Zhang, Sheng and Crespi, Vincent H. and Schiffer, Peter and Samarth, Nitin},
abstractNote = {We use spatially resolved magneto-optical Kerr microscopy to track the complete microstates of arrays of perpendicular anisotropy nanomagnets during magnetization hysteresis cycles. These measurements, along with our statistical methodology, allow us to disentangle the intertwined effects of nearest-neighbor interactions, disorder, and stochasticity on magnetization switching. We find that the nearest-neighbor correlations depend on both interaction strength and disorder. We also find that although the global characteristics of the hysteretic switching are repeatable, the exact microstate sampled is stochastic with the behavior of individual islands varying between nominally identical runs. These protocols provide another way of understanding the relationship between macrohistory and microhistory in artificial magnetic arrays.},
doi = {10.1103/PhysRevResearch.2.012001},
journal = {Physical Review Research},
number = 1,
volume = 2,
place = {United States},
year = {2020},
month = {1}
}
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