Abstract
The purity degree of metallic giant magneto-resistive (GMR) thin layers is a parameter, that can drastically influence their performance. As known, when impurities are present, the thin layer resistance increases up to a level where the spin interactions responsible for the GMR effect are hindered. By using the thermionic vacuum arc (TVA) method, the metal deposition takes place in high or ultrahigh vacuum conditions, no presence of any gas being necessary as for example in the case of sputter depositions techniques.In order to test the TVA method, simultaneous discharges in Co and Cu and also in Co and Ag vapors were ignited. The measured values of the GMR effects (defined as [R(H)–R(0)]/R(0), %) were found situated between 5% and 33% and showed a particular behavior presented in the paper.
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