Superconducting/magnetic three-state nanodevice for memory and reading applications



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Valle Granda, Javier del and Gómez, A. and González, E. M. and Osorio, M. R. and Granados, D. and Vicent López, José Luis (2015) Superconducting/magnetic three-state nanodevice for memory and reading applications. Scientific reports, 5 . ISSN 2045-2322

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We present a simple nanodevice that can operate in two modes: i) non-volatile three-state memory and ii) reading device. The nanodevice can retain three well defined states −1, 0 and +1 and can operate in a second mode as a sensor for external magnetic fields. The nanodevice is fabricated with an array of ordered triangular-shaped nanomagnets embedded in a superconducting thin film gown on Si substrates. The device runs based on the combination of superconducting vortex ratchet effect (superconducting film) with the out of plane magnetization (nanomagnets). The input signals are ac currents and the output signal are dc voltages. The memory mode is realized without applying a magnetic field and the nanomagnet stray magnetic fields govern the effect. In the sensor mode an external magnetic field is applied. The main characteristic of this mode is that the output signal is null for a precise value of the external magnetic field that only depends on the fabrication characteristics of the nanodevice.

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©Nature publishing group.
We thank Spanish MINECO grant FIS2013-45469 and CM grant S2013/MIT-2850 and EU COST Action MP-1201. D.G. acknowledges RYC-2012-09864.

Uncontrolled Keywords:Magnetic Dots; Lattice; Films; Array
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:34990
Deposited On:13 Jan 2016 20:07
Last Modified:08 Feb 2018 16:08

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