THE INTERNATIONAL CONGRESS ON INFORMATION TECHNOLOGIES IN MEDICINE, PHARMACY, AGRICULTURE, FOOD, FORESTY, ENVIRONMENT AND ENGINEERING
Magnetic Micro- and Nanowires for Applications in Code Labels
Yazarlar:
Serghey Baranov
Olga Yaltychenko
Evghenii Kanarovskii
Yayıncı:
Tokat Gaziosmanpaşa Üniversitesi
Bistable micro- and nanowires can be used for applications in code labels for goods, car parts, valuables, documents, securities, and money; the creation of informational files; for the remote control of actuating mechanisms; and the creation of sensitive elements (sensors) in measuring equipment. They also find application in medicine for distinguishing affected organs or observations of transport process of medicinal preparations (with magnetic labels) in organisms. Note that this transport process could be controlled by an external magnetic field. Glass-coated amorphous magnetic micro- and nanowires are produced by the Taylor-Ulitovsky method. This article evaluates the feasibility for code labels applications from short segments of bistable micro- and nanowires. The critical length of the short segments sections at which the bistable effect is preserved is about a millimeter, being as least ten (or more) times smaller than bistable tapes and wires obtained by other methods. The magnetization reversal rate of the microwire is higher than those of its analogs. One can hope that, for nanowires, which can be obtained from microwire by constriction with thinning, these parameters will be better. The obtained experimental and theoretical results testify that labels made out of magnetic micro- and nanowires can be used only at small distances from the recording units (at distances of ~ (0.1 – 1) m) depending on the micro- and nanowires’ diameter. In this aspect, they are not competitive for the known radio-frequency identification (RFID) systems. However, if the location of the label and the use of the label in environments absorbing radio waves are necessary or the priority of using the label is not the reading distance but, e.g., confidentiality, the use of the magnetic label out of micro- and nanowires can become preferable. In addition to the Barkhausen effect, the bistable micro- and nanowires labels also possess natural ferromagnetic resonance (NFMR), which can also used as an additional property foridentification.
