Search Results - "Bonfait, G"

Narrow gas gap in cryogenic heat switch by Franco, J., Martins, D., Catarino, I., Bonfait, G.

“…A gas gap heat switch reaches its high conductance state when the gap between two exchange surfaces is filled with a conducting gas. The broader the surface…”
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Liquid-gas hydrogen energy storage unit for the 15–17 K temperature range using an expansion volume at room temperature by Borges de Sousa, P., Martins, D., Linder, M., Noite, J., Bonfait, G.

“…In this paper, we describe a thermal energy storage unit able to absorb 400 J between 15 K and 17 K using hydrogen as the working fluid. This prototype was…”
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A Simple Pendulum Studied with a Low-Cost Wireless Acquisition Board by Alho, J, Silva, H, Teodoro, V, Bonfait, G

“…In the field of physics teaching, the simple pendulum provides a very simple way to study the harmonic oscillator, the source of some fundamental concepts such…”
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Liquid–gas cryogenic energy storage units operating at constant temperature by Afonso, J., Martins, D., Catarino, I., Patrício, R., Rocaboy, A., Tirolien, T., Bonfait, G.

“…•A closed system that absorbs heat at constant temperature is described.•It consists of a cryogenic cell connected to an expansion volume at room…”
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Neon gas-gap heat switch by Catarino, I., Bonfait, G., Duband, L.

“…A self-contained neon gas-gap heat switch featuring an internal charcoal adsorption pump has been developed and tested. This heat switch can be used with cold…”
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Sorption characterization and actuation of a gas-gap heat switch by Martins, D., Ribeiro, L., Lopes, D., Catarino, I., Esteves, I.A.A.C., Mota, J.P.B., Bonfait, G.

“…Cryogenic gas-gap heat switches are rendered compact by using a sorption pump as actuating device. The sorption pump adsorbs gas when it is cooled and releases…”
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Liquid nitrogen energy storage unit by Afonso, J., Catarino, I., Patrício, R., Rocaboy, A., Linder, M., Bonfait, G.

“…► In this study, we compare briefly three ways to store thermal energy around 80K. ► A compact energy storage unit able to store few kilojoules around 80K is…”
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6 K solid state Energy Storage Unit by CATARINO, I, AFONSO, J, MARTINS, D, LINDER, M, DUBAND, L, BONFAIT, G

“…A cryogen-free cold source for temperature below 6 K without mechanical, thermal and electromagnetic perturbations would be welcome in many sensitive…”
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20 K Energy storage unit by Bonfait, G., Catarino, I., Afonso, J., Martins, D., Linder, M., Duband, L.

“…A low temperature energy storage unit able to store 36 J between 11 K and 20 K is described. Thanks to an enthalpy reservoir connected to the cold finger of a…”
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Energy storage unit: Solid state demonstrators at 20 K and 6 K by Afonso, J., Catarino, I., Martins, D., Ricardo, J., Patricio, R., Duband, L., Bonfait, G.

“…Cryocoolers’ vibrations prevent them from being used in some sensitive applications. Stopping the cryocooler even for a short period gives rise to a steep…”
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Electron Doping of Ca4Mn3O10 Induced by Vanadium Substitution by Carvalho, M. D, Borges, R. P, Girão, A. V, Cruz, M. M, Melo Jorge, M. E, Bonfait, G, Dluzewski, P, Godinho, M

“…In this work, electron doping of the anisotropic phase Ca4Mn3O10 was achieved by substitution of manganese by vanadium. No significant structural modifications…”
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Simple specific heat apparatus based on Gifford–Mac Mahon cryocooler by Catarino, I., Bonfait, G.

“…A simple apparatus for fast specific heat measurements between 15 and 300 K is presented. It consists of a sample holder embedded into a temperature-controlled…”
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A simple calorimeter for fast adiabatic heat capacity measurements from 15 to 300 K based on closed cycle cryocooler by Catarino, I., Bonfait, G.

“…A simple, cryogen-free and inexpensive experimental setup for fast heat capacity measurements of solids from 15 to 300 K is presented. It consists of a…”
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Effect of V substitution in Ca4Mn3O10 by Girão, A.V, Carvalho, M.D, Melo Jorge, M.E, Costa, F.M, Bonfait, G, Borges, R.P, Cruz, M.M, Godinho, M

“…Compounds with general formula Ca4Mn3−xVxO10 have been produced for x⩽0.3. The studied compounds show a ferromagnetic component that we attribute to an…”
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Variation of vortex structure characteristics of Bi-2223/Ag superconducting tapes with respect to applied magnetic field direction by Oemry, F., Diantoro, M., Sutjahja, I.M., Tjia, M.O., Kopera, L., Bonfait, G.M.J., Kovac, P.

“…A study of the effects of external magnetic field orientation on the vortex characteristics was performed on a Bi-2223/Ag superconducting tape prepared by…”
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Magnetic field dependence of the non-Fermi-liquid state in ferromagnetic CePd1−xNix by Strydom, A.M, Bonfait, G, Catarino, I, Pereira, L, de V. du Plessis, P

“…The results of measurements of the electrical resistivity (*r), specific heat (C), and magnetic susceptibility (*y) are reported for compounds near the…”
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Magnetic properties of UFe5Sn single crystals by GONCALVES, A. P, WAERENBORGH, J. C, ALMEIDA, M, GODINHO, M, CATARINO, I, BONFAIT, G, NOËL, H

“…Millimetre-size UFe5Sn single crystals were grown by the top seed solution growth method and characterized by magnetization, 57Fe Mossbauer spectroscopy and…”
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Structural studies of annealed ultrathin La0.8MnO3 films by Qian, Q., Tyson, T. A., Dubourdieu, C., Bossak, A., Sénateur, J. P., Deleon, M., Bai, J., Bonfait, G.

“…A detailed study of the long-range, nanoscale, and local structure of La0.8MnO3 films of varying thickness was performed. These measurements give insight on…”
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Localization effects in the charge density wave state of the quasi-two-dimensional monophosphate tungsten bronzes (PO2)4(WO3)2m (m = 7, 8, 9) by DUMAS, J, HESS, C, SCHLENKER, C, BONFAIT, G, MARIN, E. G, GROULT, D, MARCUS, J

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Charge-density-wave instabilities and quantum transport in the monophosphate tungsten bronzes (PO2)4(WO3)2m with m = 5 alternate structure by BEIERLEIN, U, HESS, C, SCHLENKER, C, DUMAS, J, BUDER, R, GROULT, D, STEEP, E, VIGNOLLES, D, BONFAIT, G

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