Details

Autor(en) / Beteiligte

• Finocchio, G.
• Ricci, M.
• Tomasello, R.
• Giordano, A.
• Lanuzza, M.
• Puliafito, V.
• Burrascano, P.
• Azzerboni, B.
• Carpentieri, M.

Titel

Skyrmion based microwave detectors and harvesting

Ist Teil von

• Applied physics letters, 2015-12, Vol.107 (26)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2015

Quelle

AIP Journals

Beschreibungen/Notizen

• 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.