Abstract
Nanotechnology has opened numerous ways for physically realizing very sophisticated nanodevices that can be fabricated exclusively using molecular engineering methods. However, the synthesis procedures that lead to the production of nanodevices are usually complicated and time consuming. For this reason, the destination materials should be well designed. Therefore, numerical simulations can be invaluable. In this work, we present numerical simulations of the magnetic behaviour of magnetic units shaped into nanometric strips as a low dimensional layout that can be used as nano-systems of combinatorial logic. We showed that magnetic layouts that contain fewer than 16 magnetic units can take on a specific configuration as a response to the input magnetic field. Such configuration can be treated as an output binary word. The layouts that contained various numbers of magnetic units showed different switching characteristics (utterly different order of inverting of strips’ magnetic moments), thus creating numerous combinations of the output binary words in response to the analog magnetic signal. The number of possible output binary words can be increased even more by adding parameters––the system’s initial magnetic configuration. The physical realization of the model presented here can be used as a very simple and yet effective encryption device that is based on nanometric arrays of magnetic units rather than an integrated circuit. The same information, provided by the proposed system, can be utilized for the construction of a nano-sensor for measuring of magnetic field with the possibility of checking also the history of magnetization.
Highlights
Molecular engineering [1,2], one of the most important tools in nanotechnology, enables to broke the frontiers in the modern technology [3]
We considered the properties of a chain layout of magnetic units regarding the number of magnetic particles [16,17]
As we show below, based on the numerical simulations, the magnetic response of the chain of magnetic particles on the applied magnetic field strongly depended on the number of magnets in the chain and was very irregular
Summary
Molecular engineering [1,2], one of the most important tools in nanotechnology, enables to broke the frontiers in the modern technology [3]. We start from the “solving” the materials to find all the properties they have, their structure, and all of the physical laws that apply to them. We can consider some possible applications for the investigated matter. We start from considering the most prospective application for some unknown material after which we can try to find some physical and chemical properties that enable it to be used in a manner being considered. The molecular structure should be designed in such a way as to imply assumed properties to the resulting material. The classical physical methods can be used to verify the assumptions
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