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Sereni, J.G; Giovannini, M.; Gomez Berisso, M.; Gastaldo, F. |
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Title |
Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce 2.15 (Pd 1− x Ag x ) 1.95 In 0.9 alloys |
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2016 |
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Journal of Physics: Condensed Matter |
Abbreviated Journal |
J. Phys. : Condens. Matter |
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28 |
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47 |
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475601 |
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Low temperature thermal and magnetic measurements performed on ferro-magneticl (FM) alloys of composition Ce2.15(Pd1−x Ag x )1.95In0.9 are presented. Pd substitution by Ag depresses ${{T}{\text{C}}}(x)$ from 4.1 K down to 1.1 K for x  =  0.5, which is related to the increase of band electrons, with a critical concentration extrapolated to ${{x}{\text{cr}}}\approx 0.6$ . The ${{T}{\text{C}}}(x)$ decrease is accompanied by a weakening of the magnetization of the FM phase. At high temperature (T  >  30 K) the inverse magnetic susceptibility reveals the presence of robust magnetic moments ($2.56\geqslant ~{{\mu}{\text{eff}}}\geqslant 2.4$ ${{\mu}{\text{B}}}$ ), whereas the low value of the Curie–Weiss temperature ${{\theta}{P}}\approx -10$ K excludes any relevant effect from Kondo screening. The specific heat jump at ${{T}{\text{C}}}(x)$ decreases accordingly, while an anomaly emerges at a fixed temperature ${{T}^{\ast}}\approx 1$ K. This unexpected anomaly does not show any associated sign of magnetism checked by AC-susceptibility measurements. Since the total magnetic entropy (evaluated around $T={{T}{\text{C}}}(x=0)$ ) practically does not change with Ag concentration, the transference of degrees of freedom from the FM component to the non-magnetic T * anomaly is deduced. The origin of this anomaly is attributed to an arising magnetic frustration of the ground state and the consequent entropy bottleneck produced by the divergent increasing of density of excitations at low temperature. |
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0953-8984 |
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BT @ pedrazp @ |
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740 |
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Sereni, J.G. |
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Title |
Magnetic Systems: Specific Heat |
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2016 |
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Reference Module in Materials Science and Materials Engineering |
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2016 |
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4986 |
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759 |
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Sereni, J. G. |
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Title |
La investigación: una historia de nunca acabar |
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2016 |
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Ciencia e Investigación, Reseñas |
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4 |
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47 |
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760 |
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Schmoranzer, D., Jackson,M., Zemma, E., Luzuriaga,J. |
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Double-Paddle Oscillators as Probes of Quantum Turbulence in the Zero Temperature Limit |
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2016 |
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Journal of Low Temperature Physics |
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185 |
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BT @ pedrazp @ |
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745 |
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Salazar Alarcón, L. and Martínez,E. D. and Rodríguez, L. M. and Pastoriza, H. |
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Title |
Topographical and Physicochemical Contrast in Photopatterned SU-8 Films for Microfabrication of Multilayer Structures |
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Journal Article |
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2016 |
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Advances in Materials Science and Engineering |
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2016 |
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5278102 |
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During SU-8 standard photolithography process, a patterned topography is formed with a characteristic height profile produced by the different shrinkage of the UV exposed and masked regions. We study the change of wettability, film solubility, and topographic modifications on SU-8 films of different thicknesses and show its relevance in the formation of spinning-flow arrays on top layers made from positive photoresists. Also, considerable contrast in film solubility and surface energy as observed from contact angle measurements is produced. Interface diffusion of the photoresists was also observed and followed by Rutherford Back Scattering. We discuss the derivations of the mentioned effects concerning the limitations to multilayered microfabrication processes and possibilities to take advantage of the surface profiles obtained. |
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Hindawi |
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1687-8434 |
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BT @ hernan @ |
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731 |
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Roselló, J. M., Dellavale, D., Bonetto, F. J. |
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Title |
Positional stability and radial dynamics of sonoluminescent bubbles under bi-harmonic driving: Effect of the high-frequency component and its relative phase |
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Journal Article |
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2016 |
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Ultrasonics Sonochemistry |
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31 |
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610 |
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BT @ pedrazp @ |
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756 |
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Perez, M.; Lipovetzky, J.; Sofo Haro, M.; Sidelnik, I.; Blostein, J.J.; Alcalde Bessia, F.; Gomez Berisso, M. |
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Title |
Particle detection and classification using commercial off the shelf CMOS image sensors |
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Journal Article |
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2016 |
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
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Nucl. Instr. Meth. Phys. Res. A |
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827 |
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171-180 |
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Radiation detectors; CMOS image sensors; Alpha Particles; Beta rays; Gamma rays; X-rays; Dosimetry |
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Abstract
In this paper we analyse the response of two different Commercial Off The shelf CMOS image sensors as particle detectors. Sensors were irradiated using X-ray photons, gamma photons, beta particles and alpha particles from diverse sources. The amount of charge produced by different particles, and the size of the spot registered on the sensor are compared, and analysed by an algorithm to classify them. For a known incident energy spectrum, the employed sensors provide a dose resolution lower than microGray, showing their potentials in radioprotection, area monitoring, or medical applications. |
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0168-9002 |
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BT @ pedrazp @ |
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741 |
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Pérez, M.; Lipovetzky, J.; Sofo Haro, M.; Sidelnik, I.; Blostein, J. J.; Alcalde Bessia, F.; Gómez Berisso, M. |
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Particle detection and classification using commercial off the shelf CMOS image sensors |
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2016 |
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
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827 |
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171 |
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BT @ pedrazp @ |
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754 |
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Author |
Morhell, N.; Pastoriza, H. |
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Title |
Power law fluid viscometry through capillary filling in a closed microchannel |
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2016 |
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Sensors and Actuators B: Chemical |
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227 |
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24-28 |
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Microviscometer; Closed channel; Power law fluid; Non-Newtonian viscosity |
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In this work we analyze the capillary filling dynamics of non-Newtonian fluids that can be modeled with a power law constitutive equation. We solve the Poiseuille equations for an hydrophilic closed channel where capillary pressures drives the fluid in until a rest position given by the barometric pressure is reached. We show that this dynamics can be used to measure both the coefficient k and exponent n, that describes the power law fluid viscosity and we ran tests on Soda Lime Glass microchannels. Using a simple experimental setup with a USB Microscope and a custom image processing software we were able to measure the power law parameters of whole blood, wall varnish and DI water. The exponents were also obtained from the velocity profiles inside the microchannel using a custom μPIV setup matching both results with those measured with a standard Brookfield Rotational Microviscometer. |
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0925-4005 |
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BT @ hernan @ |
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723 |
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Morán, M.J.; Condó, A.M.; Soldera, F.; Sirena, M.; Haberkorn, N. |
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Martensitic transformation in freestanding and supported Cu–Al–Ni thin films obtained at low deposition temperatures |
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2016 |
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Materials Letters |
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184 |
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177 |
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BT @ pedrazp @ |
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749 |
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