Search Results - "Childress, J. R."

Imaging collective magnonic modes in 2D arrays of magnetic nanoelements by Kruglyak, V V, Keatley, P S, Neudert, A, Hicken, R J, Childress, J R, Katine, J A

“…We have used time resolved scanning Kerr microscopy to image collective spin wave modes within a 2D array of magnetic nanoelements. Long wavelength spin waves…”
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Rapid domain wall motion in permalloy nanowires excited by a spin-polarized current applied perpendicular to the nanowire by Boone, C T, Katine, J A, Carey, M, Childress, J R, Cheng, X, Krivorotov, I N

“…We study domain wall dynamics in Permalloy nanowires excited by alternating spin-polarized current applied perpendicular to the nanowire. Spin torque…”
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Resonant nonlinear damping of quantized spin waves in ferromagnetic nanowires: a spin torque ferromagnetic resonance study by Boone, C T, Katine, J A, Childress, J R, Tiberkevich, V, Slavin, A, Zhu, J, Cheng, X, Krivorotov, I N

“…We use spin torque ferromagnetic resonance to measure the spectral properties of dipole-exchange spin waves in Permalloy nanowires. Our measurements reveal…”
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Zero field high frequency oscillations in dual free layer spin torque oscillators by Braganca, P. M., Pi, K., Zakai, R., Childress, J. R., Gurney, B. A.

“…We observe microwave oscillations in relatively simple spin valve spin torque oscillators consisting of two in-plane free layers without spin polarizing…”
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Testing epitaxial Co1.5Fe1.5Ge(001) electrodes in MgO-based magnetic tunnel junctions by Neggache, A., Hauet, T., Bertran, F., Le Fèvre, P., Petit-Watelot, S., Devolder, T., Ohresser, P., Boulet, P., Mewes, C., Maat, S., Childress, J. R., Andrieu, S.

“…The ability of the full Heusler alloy Co1.5Fe1.5Ge(001) (CFG) to be a Half-Metallic Magnetic (HMM) material is investigated. Epitaxial CFG(001) layers were…”
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All-Metal Current-Perpendicular-to-Plane Giant Magnetoresistance Sensors for Narrow-Track Magnetic Recording by Childress, J.R., Carey, M.J., Maat, S., Smith, N., Fontana, R.E., Druist, D., Carey, K., Katine, J.A., Robertson, N., Boone, T.D., Alex, M., Moore, J., Tsang, C.H.

“…Read heads using current-perpendicular-to-plane (CPP) giant magnetoresistance sensors have been fabricated and tested under high-density recording conditions…”
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Thermal effects on the magnetic-field dependence of spin-transfer-induced magnetization reversal by Lacour, D., Katine, J. A., Smith, N., Carey, M. J., Childress, J. R.

“…We have developed a self-aligned, high-yield process to fabricate current-perpendicular-to-plane giant magnetoresistance (GMR) spin-valve sensors of sub-100-nm…”
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Fast and Accurate Prediction of the Vortex Magnetization Curve by Strelkov, N., Timopheev, A., Dounia, S., Childress, J. R.

“…Analytical expression for a vortex magnetization curve is obtained involving higher order magnetic energy terms in the existing analytical model. Based on this…”
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Angular Deviation of the Exchange Bias in Bilayer CoFe/IrMn Under Rotating Magnetic Field by Strelkov, N., Timopheev, A., Ducruet, C., Childress, J. R.

“…A model of exchange bias in a polycrystalline bilayer based on thermal fluctuations was extended to account for an arbitrary magnetization angle of the…”
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Acquisition of vector hysteresis loops from micro-arrays of nano-magnets by Keatley, P.S., Kruglyak, V.V., Hicken, R.J., Childress, J.R., Katine, J.A.

“…A modified scanning Kerr microscope has been used as a static Kerr magnetometer to acquire in-plane vector hysteresis loops from square Si/Ta(50 Å)/Co 80Fe…”
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Fabrication and Recording Study of All-Metal Dual-Spin-Valve CPP Read Heads by Childress, J.R., Carey, M.J., Cyrille, M.-C., Carey, K., Smith, N., Katine, J.A., Boone, T.D., Driskill-Smith, A.A.G., Maat, S., Mackay, K., Tsang, C.H.

“…Magnetic recording read heads have been fabricated and tested using a dual-spin-valve (dual-SV) current-perpendicular-to-plane (CPP) giant magnetoresistive…”
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Experimental test of an analytical theory of spin-torque-oscillator dynamics by Boone, C., Katine, J. A., Childress, J. R., Zhu, J., Cheng, X., Krivorotov, I. N.

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Picosecond magnetization dynamics in nanomagnets : Crossover to nonuniform precession by KRUGLYAK, V. V, BARMAN, A, HICKEN, R. J, CHILDRESS, J. R, KATINE, J. A

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Magnetization relaxation and structure of CoFeGe alloys by Lee, H., Wang, Y.-H. A., Mewes, C. K. A., Butler, W. H., Mewes, T., Maat, S., York, B., Carey, M. J., Childress, J. R.

“…The magnetic relaxation of 10 and 50 nm thin films of ( CoFe ) 100 − x Ge x ( 0   at . % ≤ x ≤ 35   at . % ) alloys was investigated by broadband ferromagnetic…”
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Suppression of spin torque noise in current perpendicular to the plane spin-valves by addition of Dy cap layers by Maat, S., Smith, N., Carey, M. J., Childress, J. R.

“…We demonstrate that the addition of Dy capping layers in current perpendicular to the plane giant magnetoresistive spin-valves can increase the critical…”
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Influence of a Dy overlayer on the precessional dynamics of a ferromagnetic thin film by Marcham, M. K., Yu, W., Keatley, P. S., Shelford, L. R., Shafer, P., Cavill, S. A., Qing, H., Neudert, A., Childress, J. R., Katine, J. A., Arenholz, E., Telling, N. D., van der Laan, G., Hicken, R. J.

“…Precessional dynamics of a Co50Fe50(0.7)/Ni90Fe10(5)/Dy(1)/Ru(3) (thicknesses in nm) thin film have been explored by low temperature time-resolved…”
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Local formation of a Heusler structure in CoFe-Al alloys by Wurmehl, S., Jacobs, P. J., Kohlhepp, J. T., Swagten, H. J. M., Koopmans, B., Maat, S., Carey, M. J., Childress, J. R.

“…We systematically study the changes in the local atomic environments of Co in CoFe-Al alloys as a function of Al content by means of nuclear magnetic…”
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Magnetic degradation of thin film multilayers during ion milling by Read, J. C., Braganca, P. M., Robertson, N., Childress, J. R.

“…We present a study of Ar ion milling-induced damage in exchange biased IrMn/CoFe/Ag-based magnetic multilayer thin films. While process variations determine…”
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Granular Fe in a metallic matrix by CHILDRESS, J. R, CHIEN, C. L, NATHAN, M

“…Ultrafine Fe particles with coercivities in excess of 500 Oe have been obtained by rapid annealing of sputtered metastable FexCu1−x alloys. The enhanced…”
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IrMn spin-valves for high density recording by Childress, J.R., Carey, M.J., Wilson, R.J., Smith, N., Tsang, C., Ho, M.K., Carey, K., MacDonald, S.A., Ingall, L.M., Gurney, B.A.

“…Simple IrMn spin-valves are investigated for use in high density recording head sensors. Top-IrMn spin-valves of the form NiFeCr(40 /spl Aring/)/NiFe(32 /spl…”
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