Magnetic skyrmions are topologically protected states that are very promising for the design of the next generation of ultra-low-power electronic devices. In this letter, we propose a magnetic tunnel junction based spin-transfer torque diode with a magnetic skyrmion as ground state and a perpendicular polarizer patterned as nano-contact for a local injection of the current. The key result is the possibility to achieve sensitivities (i.e., detection voltage over input microwave power) larger than 2000 V/W for optimized contact diameters. We also pointed out that large enough voltage controlled magnetocrystalline anisotropy could significantly improve the sensitivity. Our results can be very useful for the identification of a class of spin-torque diodes with a non-uniform ground state and to understand the fundamental physics of the skyrmion dynamical properties.

Skyrmion based microwave detectors and harvesting / Finocchio, G.; Ricci, M.; Tomasello, R.; Giordano, A.; Lanuzza, M.; Puliafito, Vito; Burrascano, P.; Azzerboni, B.; Carpentieri, Mario. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 107:26(2015). [10.1063/1.4938539]

Skyrmion based microwave detectors and harvesting

Tomasello, R.;Puliafito, Vito;CARPENTIERI, Mario
2015-01-01

Abstract

Magnetic skyrmions are topologically protected states that are very promising for the design of the next generation of ultra-low-power electronic devices. In this letter, we propose a magnetic tunnel junction based spin-transfer torque diode with a magnetic skyrmion as ground state and a perpendicular polarizer patterned as nano-contact for a local injection of the current. The key result is the possibility to achieve sensitivities (i.e., detection voltage over input microwave power) larger than 2000 V/W for optimized contact diameters. We also pointed out that large enough voltage controlled magnetocrystalline anisotropy could significantly improve the sensitivity. Our results can be very useful for the identification of a class of spin-torque diodes with a non-uniform ground state and to understand the fundamental physics of the skyrmion dynamical properties.
2015
Skyrmion based microwave detectors and harvesting / Finocchio, G.; Ricci, M.; Tomasello, R.; Giordano, A.; Lanuzza, M.; Puliafito, Vito; Burrascano, P.; Azzerboni, B.; Carpentieri, Mario. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 107:26(2015). [10.1063/1.4938539]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/59990
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