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    Magnetic properties of thermally treated Fe/Al multilayers

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    Fe/Al multilayers, e-beam evaporated and thermally treated in UHV, were analyzed by Mössbauer and magnetic measurements. Al diffusion along grain boundaries into Fe gives rise to solid solution and paramagnetic compounds at interfaces. By decreasing Fe thickness, the grain size decreases and the surrounding paramagnetic compounds increase, justifying the changes in hysteresis loops and reversible susceptibility

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Magnetic correlation among nanosized Co particles in Cu-Co heterogeneous thin films

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    Room temperature measurements of magnetisation and giant magnetoresistance were performed on heterogeneous CuCo thin films produced with different thickness by means of RF sputtering. Average particle size, particle size distribution, volume fraction of particles were obtained from magnetisation curve analysis. A correlation among moments was found in all examined systems, depending on him thickness. (C) 1999 Elsevier Science B.V. All rights reserved
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