Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers. Soumyanarayanan, A., Raju, M., Gonzalez Oyarce, A. L., Tan, A. K. C., Im, M., Petrović, A. P., Ho, P., Khoo, K. H., Tran, M., Gan, C. K., Ernult, F., & Panagopoulos, C. Nature Materials, 16(9):898–904, September, 2017.
Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers [link]Paper  doi  abstract   bibtex   
Magnetic skyrmions are nanoscale topological spin structures offering great promise for next-generation information storage technologies. The recent discovery of sub-100-nm room-temperature (RT) skyrmions in several multilayer films has triggered vigorous efforts to modulate their physical properties for their use in devices. Here we present a tunable RT skyrmion platform based on multilayer stacks of Ir/Fe/Co/Pt, which we study using X-ray microscopy, magnetic force microscopy and Hall transport techniques. By varying the ferromagnetic layer composition, we can tailor the magnetic interactions governing skyrmion properties, thereby tuning their thermodynamic stability parameter by an order of magnitude. The skyrmions exhibit a smooth crossover between isolated (metastable) and disordered lattice configurations across samples, while their size and density can be tuned by factors of two and ten, respectively. We thus establish a platform for investigating functional sub-50-nm RT skyrmions, pointing towards the development of skyrmion-based memory devices.
@article{soumyanarayanan_tunable_2017,
	title = {Tunable room-temperature magnetic skyrmions in {Ir}/{Fe}/{Co}/{Pt} multilayers},
	volume = {16},
	copyright = {© 2017 Nature Publishing Group},
	issn = {1476-1122},
	url = {https://www.nature.com/nmat/journal/v16/n9/full/nmat4934.html},
	doi = {10.1038/nmat4934},
	abstract = {Magnetic skyrmions are nanoscale topological spin structures offering great promise for next-generation information storage technologies. The recent discovery of sub-100-nm room-temperature (RT) skyrmions in several multilayer films has triggered vigorous efforts to modulate their physical properties for their use in devices. Here we present a tunable RT skyrmion platform based on multilayer stacks of Ir/Fe/Co/Pt, which we study using X-ray microscopy, magnetic force microscopy and Hall transport techniques. By varying the ferromagnetic layer composition, we can tailor the magnetic interactions governing skyrmion properties, thereby tuning their thermodynamic stability parameter by an order of magnitude. The skyrmions exhibit a smooth crossover between isolated (metastable) and disordered lattice configurations across samples, while their size and density can be tuned by factors of two and ten, respectively. We thus establish a platform for investigating functional sub-50-nm RT skyrmions, pointing towards the development of skyrmion-based memory devices.},
	language = {en},
	number = {9},
	urldate = {2017-09-04},
	journal = {Nature Materials},
	author = {Soumyanarayanan, Anjan and Raju, M. and Gonzalez Oyarce, A. L. and Tan, Anthony K. C. and Im, Mi-Young and Petrović, A. P. and Ho, Pin and Khoo, K. H. and Tran, M. and Gan, C. K. and Ernult, F. and Panagopoulos, C.},
	month = sep,
	year = {2017},
	keywords = {Information storage, Magnetic properties and materials, Surfaces, interfaces and thin films},
	pages = {898--904},
}

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