Spin-dependent transport in Fe and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Fe</mml:mi><mml:mo>∕</mml:mo><mml:mi>Au</mml:mi></mml:mrow></mml:math>multilayers

Monchesky, T. L.; Enders, Axel; Urban, R.; Myrtle, K.; Heinrich, B.; Zhang, X.-G.; Butler, W. H.; Kirschner, J.

doi:10.1103/physrevb.71.214440

Cited by 28 publications

(13 citation statements)

References 33 publications

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“…26 The value for the electron relaxation time el can be also obtained independently from the expression for the electrical conductivity in Au Au , Au , which is in good agreement with the result obtained from our dynamic magnetic measurements.…”

Section: B Trmoke Studiessupporting

confidence: 87%

Magnetization dynamics in the presence of pure spin currents in magnetic single and double layers in spin ballistic and diffusive regimes

et al. 2009

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In this paper we study the spin transport by using the spin-pumping effect in epitaxial magnetic single and double layer film structures. For the magnetic single layer sample we show the spin-pumping-induced interface damping increases and saturates with the Au capping layer thickness. In addition magnetic double layer structures allowed us to investigate both the spin-pump and spin-sink effects. Coupling of pure spin currents to the magnetization via spin-sink effect is studied using time-resolved magneto-optical Kerr effect. These measurements were used to study the propagation of pure spin currents across a Au spacer layer between the two ferromagnets. The propagation of spin momentum density through the Au spacer layer was well described by spin-diffusion equation, which takes into account electron momentum and spin-flip scattering. The spindiffusion theory was integrated into modified Landau-Lifshitz equations accounting in self-consistent manner for spin-pump/sink mechanism and spin momentum density propagation. Good agreement between theory and experimental data was found.

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Section: B Trmoke Studiessupporting

confidence: 87%

Magnetization dynamics in the presence of pure spin currents in magnetic single and double layers in spin ballistic and diffusive regimes

et al. 2009

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“…Substrates were subsequently annealed and monitored by RHEED until ϫ4 and ϫ6 reconstructions were observed. This preparation method is similar to that used by Monchesky et al 27,28 and has been shown by scanningtunneling-microscopy ͑STM͒ to yield a mixed-reconstruction of 4 ϫ 2 and 1 ϫ 6. A mix of 4 ϫ 2 and 2 ϫ 6 has also been observed 11 when samples were sputtered at elevated temperatures.…”

Section: Methodsmentioning

confidence: 89%

In-plane structural anisotropy of ultrathin Fe films onGaAs(001)−4×6: X-ray absorption fine-structure spectroscopy measurements

Gordon

Crozier

2006

Phys. Rev. B

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Iron films of thickness 2 monolayers ͑ML͒ and 5 monolayers prepared on pseudo 4 ϫ 6-reconstructed GaAs͑001͒ surfaces were studied in situ at the PNC/XOR beamline by polarization-dependent x-ray absorption fine structure methods to investigate structural anisotropy in the plane of the films and compare with theoretical predictions. These two thicknesses are on either side of the transition from island to layer-by-layer growth modes and provide insight into possible structural origins of in-plane uniaxial magnetic anisotropy observed in this magnetic film system. First-principles calculations by ͓Mirbt et al., Phys. Rev. B 67, 155421 ͑2003͔͒ have suggested a splitting in the nearest neighbor distances of the iron could be as large as 0.06 Å, for 1 ML of arsenic having migrated to the film surface, distorting the structure slightly from body-centered tetragonal along the ͗110͘ and ͗−110͘ directions. We observe a splitting of approximately 0.02͑1͒ Å at 2 ML in the nearest-neighbor distances. An electronic anisotropy was detected at 2 ML that could correspond to differences in bonding between gallium and arsenic dangling bonds. An anisotropy in mean-square relative displacement was apparent for the 5 ML film, though no difference in nearest-neighbor distances was observed beyond error.

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“…For example, the isolated vanadium-doped Au 12 À cluster, which shows an enhanced electron density on gold atoms, is an improved novel catalyst for CO oxidation [4]. Recently, the pure gold materials doped with iron element have been extensively studied because of their unique physical and chemical properties [9][10][11][12][13][14][15][16]. It was shown that the Fe in fcc disordered Au-Fe alloys is in high-spin state [9].…”

Section: Introductionmentioning

confidence: 99%