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, Marco; Tomasello, R; Giordano, A; Lanuzza, Marco; Puliafito, V; Burrascano, P; Azzerboni, B; Carpentieri, M.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 107:26(2015), pp. 262401.262401-1-262401.262401-5.
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Titolo: | Skyrmion based microwave detectors and harvesting |
Autori: | |
Data di pubblicazione: | 2015 |
Rivista: | |
Citazione: | Skyrmion based microwave detectors and harvesting / Finocchio, G; Ricci, Marco; Tomasello, R; Giordano, A; Lanuzza, Marco; Puliafito, V; Burrascano, P; Azzerboni, B; Carpentieri, M.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 107:26(2015), pp. 262401.262401-1-262401.262401-5. |
Handle: | http://hdl.handle.net/20.500.11770/144661 |
Appare nelle tipologie: | 1.1 Articolo in rivista |