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Magnetic interface anisotropy in Ni/Fe/Ni(111) trilayers
No full textThe direction of the spins of Ni capping layers and the 57Fex interlayer have been studied in Ni/57Fex/Ni(1 1 1) films by magneto-optic-vector Kerr and Mössbauer spectroscopy. It was found that the magnetization direction of the Ni follows the orientation of that of the Fe, and that there is an unusual rotation of the magnetization from the in-plane to out-of-plane in the pseudomorphic range of the Fe growth. The effect of the competition between perpendicular surface anisotropy and the magnetostatic energy is discusse
Structural and magnetic properties of Ni/gamma-Fe/Ni multilayers
No full textThe crucial point in the characterization of magnetic interfaces is the knowledge of the morphology and the structure of the films. Ni/gamma-Fe/Ni multilayers were grown on three different buffer layers. Structure and morphology were investigated by X-ray diffraction and scanning tunneling microscope. Mossbauer spectroscopy was used to provide local information on both structure and magnetism of the buried Fe layers
Pseudoiperaldosteronismo da assunzione cronica di liquirizia e rabdomiolisi iperkaliemica. Caso clinico.
No full textMagnetic profile of Ni/Fe/Ni trilayers
No full textThe magnetic structure of Ni(1 1 1)/Fe/Ni trilayer was studied by Mossbauer spectroscopy. Two kinds of samples were studied differing each other in the substrate preparation, in the evaporation method of Fe-57 and in vacuum condition. Fabrication by thermal evaporation in HV on a Ni buffer layer grown on mica and by electron beam bombardment in UHV on cleaned Ni(1 1 1) single crystal was used. The Ni substrate morphology was characterised by STM. Similar magnetic structure was found for the two systems, consisting of two well-defined features of the hyperfine field occurring at high value (similar to 28 T) and low one (<8 T). The high-field component was assigned to Fe atoms close to Fe-Ni interface with high-spin ferromagnetic state, and the low-field component to Fe atoms inside the Fe layer with low-spin antiferromagnetic state
Magnetism and morphology of NiCu (100) and Ni-Fe-Ni/Cu (100) ultrathin films
No full textNi films and Ni-Fe-Ni trilayers on Cu(1 0 0) have been grown and characterized in situ in their structure and morphology. The magnetic properties have been investigated ex situ using MOKE. It is found that the magnetization is out-of-plane for both systems and that the presence of the Fe interlayer favors the in-plane reorientation. The effect of the Fe layer is interpreted on the basis of the competition between perpendicular interface and dipolar anisotropies. A method based on the coercive field for the orientation of the magnetization is presente
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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