Matthias ZieglerComputer Integrated SurgeryPaper ReviewLocalization of Amorphous WireThe project I am working on uses a special magnetic property, the barkhausen effect. While there was no one paper that accurately used the barkhausen effect the same way that I plan on using it, there were two articles that combined show how it will be used. The first paper isLarge Barkhausen and Matteucci Effects in FeCoSiB, FeBrSiB, and FeNiSiB Amorphous Wires. The other paper is the US Patent number 5,381,532, Identification Tags Using Amorphous Wire. The first paper describes how the amorphous wire reacts under a magnetic field. This paper shows the effect under three different circumstances, when there is a longitudinal ac field compared to the wire, when there is an ac current creating the magnetic field, and when there is an ac field perpendicular to the wire. From this paper the two pieces that we are most interested in are the ac field when perpendicular and when parallel to the amorphous wire. In my experiment these are the types of fields that will be used. The paper shows that when the amorphous wire is placed in this field it has a reaction that can be easily seen as two spikes in an otherwise ordinary sin wave. These two spikes are the reversal of the core of the amorphous wire and are what I will be using to determine the location of the wire. The wire that they use in this paper is the same type of wire that is used in my experiment.One of the members of the patent that I included was Robert Von Gutfeld, who is also a member of this project. The major importance of this patent shows that the amorphous wire can be detected from a distance when in a magnetic field. Also this patent proves that the magnetics that are needed are not disrupted by normal metals. The only thing that will disrupt the field is ferromagnetic materials. This is very important in my project, because there will be many other objects around a patient when we are doing the localization and therefore we need to know what will disrupt the field. Both of these papers are very important to the project that I am working on, as they show the specifics of how amorphous wire responds to a magnetic field and shows the Barkhauseneffect in a extreme situation. Most ferromagnetic materials take numerous jumps to change magnetism, but with this specially made amorphous wire it occurs in one large jump.References:K. Mohri, F.B. Humphrey, K. Kawashima, K. Kimura, and M. Mitzutani. Large Barkhausen and Matteucci Effects in FeCoSiB, FeBrSiB, and FeNiSiB Amorphous Wires. IEEE. Trans. Magn. Vol 26, No. 5, Sept 1990Gambino; Richard Joseph (Stony Brook, NY); Schrott; Alejandro Gabriel (New York, NY); von Gutfeld; Robert Jacob (New York, NY). Identification tags using amorphous wire. US Patent #
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