2015/09/24 by G. Finocchio, M. Ricci, R. Tomasello +6 · 3 citations
Physics and Astronomy · #Biasing #Detector #Diode #Ground state #Magnetic properties of thin films #Microwave #Polarizer #Quantum and electron transport phenomena #Skyrmion #Topological Materials and Phenomena #Voltage #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.4938539
10 pages, 5 figures
arxiv created 2015/09/24 · openalex publication_date 2015/12/28 · arxiv updated 2016/01/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.