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I. PRIOTEASA1,* , V. CIUPINĂ1, I. M. OANCEA-STĂNESCU1, G. PRODAN1, C. ŞTEFANOV1
Development of new magnetic materials, especially of those who present GMR effect are intensively studied by many research teams. GMR effect occurs in thin films structure composed by ferro-magnetic metal deposits alternatively. Electrical resistance has a significant decrease in the presence of magnetic field. Granular thin films which presents GMR effect have interesting properties and a series of applications. We can list here magnetic sensor, the reading heads. Nanocrystalline magnetic grains in these films are included in the nonmagnetic matrix. The interesting properties appear only when magnetic grains are isolated in nonmagnetic matrix. To obtain thin films we use 2 TVA guns, one of them to evaporate an alloy 80%Ni - 20%Fe, and the other to evaporate the Cu anode. Deposited films present a uniformity in what concerns the thickness and dispersion of the nanograins from the film. The diameter calculated is determined by mediation of distances between two lines tangent to the contour of the particle measured for angles from 15 to 15 degrees. Complex nanostructures obtained by TVA method have special morphological properties with grain with size below 10 nm. The electron diffraction shows the presence of Cu in cubic phase. Electric and magnetic responses are in concordance with the theory of granular solids. The measurements show that magneto-optical effects are increased when the films are deposited on Si..
Thin films, Magnetoresistivity, TVA-method.
I. PRIOTEASA, V. CIUPINĂ, I. M. OANCEA-STĂNESCU, G. PRODAN, C. ŞTEFANOV, Complex CuNiFe films obtained by TVA method, Optoelectronics and Advanced Materials - Rapid Communications, 6, 5-6, May-June 2012, pp.597-600 (2012).
Submitted at: Sept. 8, 2011
Accepted at: June 6, 2012
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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