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Unified understanding of both thermally assisted and precessional spin-transfer switching in perpendicularly magnetized giant magnetoresistive nanopillars
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10.1063/1.4789879
/content/aip/journal/apl/102/4/10.1063/1.4789879
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/4/10.1063/1.4789879
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Dependence of the resistance R on the external magnetic field H ext. The magnetic field was applied to the film normal. Inset: full cycle of the R–Hext curve. The free and reference layer coercivities are 1.3 and 6.0 kOe, respectively. The offset field originating from the dipole coupling between the free and reference layers is estimated to be −0.7 kOe.

Image of FIG. 2.
FIG. 2.

(a) A schematic of the measurements setup. (b) Two-dimensional color map of the spin-transfer switching probability P sw from AP to P states as a function of the pulse current amplitude I and width t pulse under a field of Hext = −0.7 kOe to the film normal, which cancels the dipole coupling between the free and reference layers. Red (blue) represents a high (low) Psw. The black solid and dotted lines, respectively, show fits for P sw = 0.5 of Eq. (3) for I < I c0 and of Eq. (5) for I > I c0 with fitting parameters of Δ = 80, I c0 = 1.7 mA, and Ω = 1.7 GHz. Inset: the attempt time τ0 as a function of I.

Image of FIG. 3.
FIG. 3.

Differential switching probability at P sw = 0.5 for an arbitrary current h and time t as a function of the normalized current h = I/I c0. Circles and triangles are the experimental results for dP sw/dh (h < 1) and dP sw/dt (h > 1), respectively. Solid and dotted lines are the results of Eq. (6) with Δ = 80, I c0 = 1.7 mA, and Ω = 1.7 GHz.

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/content/aip/journal/apl/102/4/10.1063/1.4789879
2013-02-01
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Unified understanding of both thermally assisted and precessional spin-transfer switching in perpendicularly magnetized giant magnetoresistive nanopillars
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/4/10.1063/1.4789879
10.1063/1.4789879
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