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A simple pendulum studied with a low-cost wireless acquisition board

Autor: Hugo Silva, Vitor Duarte Teodoro, G. Bonfait, J. Alho

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

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 as periodicity, relaxation time and anharmonicity. As such, its experimental study is freq

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::106ee6a83b401707a40c28f75226deea
http://www.scopus.com/inward/record.url?scp=85058042812&partnerID=8YFLogxK

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Structural, magnetic, and transport studies of La0.8MnO3 films

Autor: Catherine Dubourdieu, Trevor A. Tyson, G. Bonfait, J. Maria, J. P. Senateur, J. Bai, Q. Qian, A. Bossak, Michael Deleon

Publikováno v: Journal of Applied Physics. 92:4518-4523

A study of the properties of La0.8MnO3 films of varying thickness was performed. Transport and magnetization measurements show that the ferromagnetic (metallic) volume fraction of the film varies from ∼ 1/4 for ultrathin 60 A films to ∼ 1/2 for 1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5618651c4d0df18e8d13306e3b8dee1e
https://doi.org/10.1063/1.1505667

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Charge-density-wave instabilities and quantum transport in the monophosphate tungsten bronzes with m = 5 alternate structure

Autor: Jean Dumas, Daniel Groult, G. Bonfait, D. Vignolles, E. Steep, C. Hess, R. Buder, U. Beierlein, C. Schlenker

Publikováno v: The European Physical Journal B. 17:215-226

Resistivity, thermoelectric power and magnetotransport measurements have been performed on single crystals of the quasi two-dimensional monophosphate tungsten bronzes (PO2)4(WO3)2m for m=5 with alternate structure, between 0.4 K and 500 K, in magneti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e5b4d4a1ce7f7301e675d8b9e1521000
https://doi.org/10.1007/s100510070135

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Localization effects in the charge density wave state [4]of the quasi-two-dimensional monophosphate tungsten bronzes

Autor: G. Bonfait, C. Hess, C. Schlenker, E. Gomez Marin, J. Dumas, J. Marcus, Daniel Groult

Publikováno v: The European Physical Journal B. 14:73-82

The monophosphate tungsten bronzes (PO 2 ) 4 (WO 3 ) 2m are quasi-two-dimensional conductors which show charge density wave type electronic instabilities. We report electrical resistivity and magnetoresistance measurements down to 0.30 K and in magne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9813c50e961708cc31f5649f5c4fb9ec
https://doi.org/10.1007/s100510050108

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Single-crystal study on the heavy-fermion antiferromagnet UZn₁₂

Autor: A P, Gonçalves, P, Estrela, A, de Visser, E B, Lopes, I, Catarino, G, Bonfait, M, Godinho, M, Almeida, D, Gnida, D, Kaczorowski

Publikováno v: Journal of physics. Condensed matter : an Institute of Physics journal. 23(4)

Millimetre size UZn(12) single crystals were grown by the high temperature solution growth method using zinc as the solvent. Single-crystal x-ray diffraction data confirm that this compound crystallizes in the hexagonal high temperature form of SmZn(

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::12ea75e03e17e15118230c56780b8423
https://pubmed.ncbi.nlm.nih.gov/21406890

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CUSTOMIZABLE GAS-GAP HEAT SWITCH

Autor: D. Martins, I. Catarino, U. Schroder, J. Ricardo, R. Patricio, L. Duband, G. Bonfait, J. G. Weisend

Publikováno v: AIP Conference Proceedings.

The so‐called gas gap heat switch, in which the pressure is managed by a coupled small cryopump having no moving parts, is known to be a very reliable and simple heat switch.Mechanical design improvements can lead to optimized ON or OFF characteris

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9560759b3c88e7acb826f2b6f592cbe5
https://doi.org/10.1063/1.3422349

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Comment on the article 'The Peierls transition in a magnetic field for the two-chain organic conductor (Perylene) 2 [Pt(S 2 C 2 (CN) 2 ) 2 ]'

Autor: M. Almeida, G. Bonfait

Publikováno v: Europhysics Letters (EPL). 36:477-479

In a recent letter [1], the magnetic-field dependence of the metal-insulator (MI) transition temperature in the Per2[Pt(mnt)]2 compound (Per = perylene,mnt = S2C2(CN)2) was presented and was found in agreement (fig. 1) with the theoretical prediction

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::125f98ed0adab893fe06f83d6eb4475a
https://doi.org/10.1209/epl/i1996-00256-8

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Electronic Instabilities and Localization Effects in the Quasi-Two-Dimensional Monophosphate Tungsten Bronzes (PO2)4(WO3)2m and KxP4W8O32

Autor: J. Dumas, U. Beierlein, Pascal Roussel, C. Hess, Claire Schlenker, G. Bonfait, Daniel Groult, E. Gomez Marin, Ph. Labbé, S. Drouard

Publikováno v: Journal of Solid State Chemistry
Journal of Solid State Chemistry, 1999, 147 (1), pp.320-327. ⟨10.1006/jssc.1999.8289⟩
Journal of Solid State Chemistry, Elsevier, 1999, 147 (1), pp.320-327. ⟨10.1006/jssc.1999.8289⟩

The monophosphate tungsten bronzes (PO2)4(WO3)2m with pentagonal tunnels are quasi-two-dimensional conductors that show charge density wave type electronic instabilities. These series of compounds provide a model system where the low-dimensional char

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7e016abc71d4aab7fbabbd57371b582
https://hal.science/hal-02270367

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