130,599 research outputs found
Rhodacarus laureti Athias-Henriot 1961
No full text135. <i>Rhodacarus laureti</i> Athias-Henriot, 1961 <p> <i>Rhodacarus laureti</i> Athias-Henriot, 1961: 501.</p> <p> <i>Rhodacarus laureti</i>.— Lee, 1970: 29; Karg, 1993: 335.</p> <p> <i>Rhodacarus</i> (<i>Rhodacarus</i>) <i>laureti</i>.— Shcherbak, 1980: 46.</p> <p>TYPE DEPOSITORY: Laboratoire d’Acarologie de l’École Pratique des Hautes Études, Paris, France.</p> <p> TYPE LOCALITY AND HABITAT: Algeria, l'Oued Bouzaréah valley, 3 January 1961, in soil under <i>Laurus nobilis</i> [Lauraceae].</p> <p> NOTE: Bregetova & Shcherbak (1977): 269 suggested that <i>R</i>. <i>roseus</i> sensu Sheals (1958) could be a misidentification of <i>R</i>. <i>laureti</i>.</p>Published as part of <i>Castilho, Raphael C., De Moraes, Gilberto J. & Halliday, Bruce, 2012, 3471, pp. 1-69 in Zootaxa 3471</i> on page 4
Focus on Metastable, Amorphous and Nanostructured Materials: Editorial note for the special issue - ISMANAM 2018
No full textInterface exchange coupling in a CoPt/NiO bilayer
No full textThe effects originating from the proximity between the ferromagnetic and the antiferromagnetic phase of a CoPt/NiO bilayer, grown at 670 K by Pulsed Laser Deposition, have been investigated from the point of view of the chemical properties (through Hard X-ray Photoelectron Spectroscopy, HAXPES) and of the magnetic behavior (by measuring hysteresis loops in the temperature range 5–300 K both after cooling in zero external field and after cooling from T=380 K in a field of 1 T). At T=5 K, the coercivity, measured after zero-field-cooling, is ~168 mT, to be compared to that of a reference CoPt layer of ~87 mT. Such magnetic hardening of the ferromagnetic CoPt phase is ascribed to the magnetic exchange interaction at the interface with the antiferromagnetic NiO phase, which is also responsible for the horizontal shift of the loop, observed only after field-cooling (exchange bias effect). Actually, the latter effect persists up to room temperature (exchange fields μ0Hex ~60 mT and ~8 mT were observed at T=5 and 300 K, respectively). Hence, it can be deduced that the CoPt and NiO phases are efficiently coupled by the exchange interaction, despite the chemical inhomogeneity observed at the interface region. In fact, the HAXPES analysis reveals that a chemical reduction of the NiO phase takes place in the interface region, resulting in the formation of metallic Ni. On the other hand, this inhomogeneity of the interface is proposed to be at the origin of the peculiar shape of the field-cooled loop at T=5 K, featuring a double reversal of the magnetization[1].
This work has been supported by MIUR, under project FIRB2010 – NANOREST
[1] Laureti et al. Thin Solid Films, 543 (2013) 16
Direct Synthesis of L10 FePt Nanoparticles within Carbon Nanotubes by Wet Chemical Procedure
No full textCreative Intangible Products and Services for Industry in Europe.
No full textIn this article we estimate the level of “Design Application” in 37 European Countries in the period 2010-2019. We use data from the European Innovation Scoreboard-EIS of the European Commission. We perform four econometric models i.e., Pooled OLS, Panel Data with Random Effects, Panel Data with Fixed Effects, Dynamic Panel. We found that the level of Design Applications is negatively associated to “Enterprise Births”, “Finance and Support”, “Firm Investments” and positively associated with “Venture Capital”, “Turnover share large enterprises”, “R&D expenditure public sector”, “Intellectual Assets”. In adjunct we perform a cluster analysis with the application of the k-Means algorithm optimized with the Silhouette Coefficient and we found three different clusters. Finally, we confront eight different machine learning algorithms to predict the level of “Design Application” and we found that the Tree Ensemble is the best predictor with a value for the 30% of the dataset analyzed that is expected to decrease in mean of -12,86%
The role of chemical and microstructural inhomogeneities on interface magnetism
No full textThe study of interfacing effects arising when different magnetic phases are in close contact has led to the discovery of novel physical properties and the development of innovative technological applications of nanostructured magnetic materials. Chemical and microstructural inhomogeneities at the interfacial region, driven by interdiffusion processes, chemical reactions and interface roughness may significantly affect the final properties of a material and, if suitably controlled, may represent an additional tool to finely tune the overall physical properties. The activity at the Nanostructured Magnetic Materials Laboratory (nM2-Lab) at CNR-ISM of Italy is aimed at designing and investigating nanoscale-engineered magnetic materials, where the overall magnetic properties are dominated by the interface exchange coupling. In this review, some examples of recent studies where the chemical and microstructural properties are critical in determining the overall magnetic properties in core/shell nanoparticles, nanocomposites and multilayer heterostructures are presented
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