Narrow linewidth spin transfer driven vortex self-oscillations in Py/Cu/Py spin valves of elliptical cross section (160 nm x 75 nm) are investigated by means of micromagnetic simulations. "GPmagnet", a high performance GPU based micromagnetic package, is used for this purpose, allowing for 100 KHz spectral resolution at reasonable computational time. The variation of the linewidth with applied current (10 x 10(7) A/cm(2) < J < 20 x 10(7) A/cm(2)) is analyzed in the temperature range 0 K < T < 300 K. Linewidths around 1 MHz are found at T = 0 K. At T = 300 K, linewidths remain below 2 MHz for J < 16 x 10(7) A/cm(2), whereas for larger currents the presence of two oscillation modes lead to a further linewidth increase.

Intrinsic and Thermal Linewidths of Spin-Transfer-Driven Vortex Self-Oscillations / Torres, L; Carpentieri, Mario; Martínez, E; Lopez Diaz, L; Hernandez Lopez, A; Aurelio, D; Finocchio, G.. - In: IEEE TRANSACTIONS ON MAGNETICS. - ISSN 0018-9464. - 49:7(2013), pp. 3203-3206. [10.1109/TMAG.2013.2248135]

Intrinsic and Thermal Linewidths of Spin-Transfer-Driven Vortex Self-Oscillations

CARPENTIERI, Mario;
2013-01-01

Abstract

Narrow linewidth spin transfer driven vortex self-oscillations in Py/Cu/Py spin valves of elliptical cross section (160 nm x 75 nm) are investigated by means of micromagnetic simulations. "GPmagnet", a high performance GPU based micromagnetic package, is used for this purpose, allowing for 100 KHz spectral resolution at reasonable computational time. The variation of the linewidth with applied current (10 x 10(7) A/cm(2) < J < 20 x 10(7) A/cm(2)) is analyzed in the temperature range 0 K < T < 300 K. Linewidths around 1 MHz are found at T = 0 K. At T = 300 K, linewidths remain below 2 MHz for J < 16 x 10(7) A/cm(2), whereas for larger currents the presence of two oscillation modes lead to a further linewidth increase.
2013
Intrinsic and Thermal Linewidths of Spin-Transfer-Driven Vortex Self-Oscillations / Torres, L; Carpentieri, Mario; Martínez, E; Lopez Diaz, L; Hernandez Lopez, A; Aurelio, D; Finocchio, G.. - In: IEEE TRANSACTIONS ON MAGNETICS. - ISSN 0018-9464. - 49:7(2013), pp. 3203-3206. [10.1109/TMAG.2013.2248135]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/974
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