Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2010 - zeszyt 3

Research on the texture of Cu/Ni multilayers with a diversified period thickness

nr katalogowy: 52705

The modification of materials surface, including the production of surface layers and coatings, constitutes now one of the key problems of materials engineering. Particularly interesting is the production of coatings in a multilayer system, whereby materials of unique properties resulting from the diversified composition of components (such as metals, semiconductors, and their combinations) can be obtained [1]. From the point of view of magnetic properties, multilayers in ferromagnetic/diamagnetic material systems are being intensively investigated, owing to the gigantic magnetoresistance (GMR) phenomenon that has been discovered in them by a team of scientists under the guidance of Alberta Fert and Peter Grünberg. A thin-layered Cu/Ni structure is a classical example of a multilayer of such properties, which could be applied in construction of hard discs [2÷7]. The identical crystallographic structure, fcc, and the very small misfit (2.5%) of the copper and nickel lattices cause Cu/Ni multilayers to exhibit good mutual adhesion and to be easily made by various techniques, including PVD [8, 9]. Depending on their production technique and thickness, multilayers can exhibit a different degree of texturing. A heavy texturing of sublayers causes an increase in the roughness of interfacial surfaces, which adversely affects the quality of the multilayers, e.g. impairs their magnetic properties [10, 11]. For the examination of the structure and quality of coatings, the X-ray diffraction technique is commonly used [12÷14]. Material and methodology The material used for tests were Cu/Ni multilayers produced on a monocrystalline Si(100) silicon substrate by the magnetron sputtering method. The multilayers were diversified in terms of Ni sublayer thickness (1, 3 and 6 nm), while maintaining a fixed Cu sublayer thickness of 2 nm. Each multilayer was built of 100 periods, each of a thickness[...]

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