34,087 research outputs found
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
What is the role of enteral nutrition in severe pancreatitis?
No full textWhat is the role of enteral nutrition in severe pancreatiti
[Psychologic implications in loco-regional anesthesia]. FT Implicazioni psicologiche in anestesia loco-regionale.
No full text
RISK FACTORS OF PEPTIC ULCER IN 4943 PATIENTS
No full textthe incidence of peptic ulcer decreased since the introduction od proton pump inhibitors as the consequence of prevention of NSAI correlated peptic ulcer
Structural relaxation effects on the hyperfine parameters in Fe80B20 amorphous alloys
No full textWe have studied the influence of the relaxation effects on the different kinds of short range order structures which can be distinguished inFe 80 B 20 amorphous alloys by Mössbauer spectroscopy. The analysis of the distribution function of the hyperfine fields gives results on the variations of the chemical and topological short-range orders in good agreement with those known in literature. Attempt to give quantitative results is made
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
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