DOI: 10.1063/1.2045552. Reducing the critical current for short-pulse spin-transfer switching of nanomagnets

Reducing the critical current for short-pulse spin-transfer switching of nanomagnets

10.1063/1.2045552

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

We have fabricated permalloy∕copper∕permalloy nanopillar spin valves designed to reduce the critical current for spin-transfer switching while maintaining thermal stability of the free layer. Pulsed current amplitudes necessary for switching a 4.5-nm-thick permalloy free layer range from 0.4mA for a 100ns pulse to 2mA for a 1ns pulse, showing that the magnetization must be overdriven to achieve switching on short time scales. Comparisons to Landau–Lifshitz–Gilbert simulations indicate an effective damping parameter ≈0.03 and spin-torque efficiencies for parallel-to-antiparallel and antiparallel-to-parallel switching that are more symmetric than predicted by recent theoretical models.

Bibliography

Braganca, P. M., Krivorotov, I. N., Ozatay, O., Garcia, A. G. F., Emley, N. C., Sankey, J. C., Ralph, D. C., & Buhrman, R. A. (2005). Reducing the critical current for short-pulse spin-transfer switching of nanomagnets. Applied Physics Letters, 87(11).

Authors 8

P. M. Braganca (first)
I. N. Krivorotov (additional)
O. Ozatay (additional)
A. G. F. Garcia (additional)
N. C. Emley (additional)
J. C. Sankey (additional)
D. C. Ralph (additional)
R. A. Buhrman (additional)

References 24 Referenced 74

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Dates

Type	When
Created	19 years, 11 months ago (Sept. 8, 2005, 6:03 p.m.)
Deposited	2 years, 1 month ago (July 2, 2023, 9:30 p.m.)
Indexed	3 weeks, 4 days ago (Aug. 6, 2025, 9:52 a.m.)
Issued	19 years, 11 months ago (Sept. 9, 2005)
Published	19 years, 11 months ago (Sept. 9, 2005)
Published Online	19 years, 11 months ago (Sept. 9, 2005)
Published Print	19 years, 11 months ago (Sept. 12, 2005)

Funders 0

None

BibTeX

@article{Braganca_2005, title={Reducing the critical current for short-pulse spin-transfer switching of nanomagnets}, volume={87}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.2045552}, DOI={10.1063/1.2045552}, number={11}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Braganca, P. M. and Krivorotov, I. N. and Ozatay, O. and Garcia, A. G. F. and Emley, N. C. and Sankey, J. C. and Ralph, D. C. and Buhrman, R. A.}, year={2005}, month=sep }

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