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Author Schmoranzer, D.; Jackson, M.J.; Luzuriaga, J.
Title (up) On the Non-linear Damping of Mechanical Oscillators in Flows of 4He Type Journal Article
Year 2014 Publication Journal of Low Temperature Physics Abbreviated Journal J. Low Temp. Phys.
Volume 175 Issue 1 Pages 97-103
Keywords Resonator; Non-linear dissipation; Turbulence; Liquid helium
Abstract In the studies of both classical and quantum turbulence, significant attention is devoted to the investigation of the behavior of various submerged resonators. Upon entering the turbulent regime, the oscillators start to experience a significant drag force, which varies non-linearly with velocity. We present an empirical way of modeling such systems, and calculate the expected resonant response of such oscillators near the fundamental frequency as a function of the applied driving force. We apply the model to the crossover from linear to non-linear drag forces and compare with previous models as well as selected experimental data on the transition to turbulence in oscillatory flow of 4He.
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Publisher Springer US Place of Publication Editor
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ISSN 0022-2291 ISBN Medium
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Notes Approved no
Call Number BT @ pedrazp @ Serial 663
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Author Espinoza Torres, C.; Condó, A.M.; Haberkorn, N.; Zelaya, E.; Schryvers, D.; Guimpel, J.; Lovey, F.C.
Title (up) Structures in textured Cu-Al-Ni shape memory thin films grown by sputtering Type Journal Article
Year 2014 Publication Materials Letters Abbreviated Journal Materials Characterization
Volume 96 Issue Pages 256-262
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Notes Cited By :5; Export Date: 14 March 2018 Approved no
Call Number BT @ jguimpel @ Serial 791
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Author Cecilia Blanco, M.; De Paoli, J.M.; Ceppi, S.; Tirao, G.; Nassif, V.M.; Guimpel, J.; Carbonio, R.E.
Title (up) Synthesis, structural characterization and magnetic properties of the monoclinic ordered double perovskites BaLaMSbO6, with M = Mn, Co and Ni Type Journal Article
Year 2014 Publication Journal of Alloys and Compounds Abbreviated Journal
Volume 606 Issue Pages 139-148
Keywords Double perovskites; Magnetic properties; X-ray emission spectroscopy; Neutron powder diffraction
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ISSN 0925-8388 ISBN Medium
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Notes Approved no
Call Number BT @ jguimpel @ Serial 681
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Author D. Perez-Morelo and H. Pastoriza
Title (up) Torque magnetometry in YBa 2 Cu 3 O 7-δ single crystals using high sensitive micromechanical torsional oscillator Type Journal Article
Year 2014 Publication Journal of Physics: Conference Series Abbreviated Journal
Volume 568 Issue 2 Pages 022038
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Abstract We have developed a high-sensitive micro-torsional oscillators and fabricated with a standard silicon process, as a platform to study the low temperatures magnetic properties of micron sized samples. When the oscillator-sample system interacts with a magnetic field, the displacement of the oscillator from its equilibrium position can be detected as a small change in the capacitance (≈ 0.001 pF). We use this device to study the magnetic response of a thick twinned YBa 2 Cu 3 O 7− δ disk when the magnetic field is tilted away from the c axis in the temperature range 80 K < T < 100 K (T c ≈ 92K).
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ISSN 1742-6596 ISBN Medium
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Notes Approved no
Call Number BT @ hernan @ Serial 703
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Author Amigó, M.L.; Crivillero, V.A.; Franco, D.G.; Badía-Majós, A.; Guimpel, J.; Nieva, G.
Title (up) Vortex pinning by intrinsic correlated defects in Fe<inf>1-y</inf>Se Type Journal Article
Year 2014 Publication Journal of Physics: Conference Series Abbreviated Journal J. Phys.: Conf. Ser.
Volume 507 Issue Part 1 Pages
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Notes Cited By :1; Export Date: 14 March 2018 Approved no
Call Number BT @ jguimpel @ Serial 790
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