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See detailMagnetic Susceptibility, Correlations and Paleozoic Environments
Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg

Book published by Geologica Belgica (2010)

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See detailMagnetic texturing of bulk samples of the superconductor Bi2Sr2Ca0.8Dy0.2Cu2O8-y
Stassen, Sophie; Rulmont, André ULg; Vanderbemden, Philippe ULg et al

in Journal of Applied Physics (1996), 79(1), 553-555

The texturing process of Bi-Sr-Ca(Dy)-Cu-O (2212) is optimized by sintering under a magnetic field. The precursor crystalline powder is melted and grown under a 1.2 T magnetic field. Textured samples are ... [more ▼]

The texturing process of Bi-Sr-Ca(Dy)-Cu-O (2212) is optimized by sintering under a magnetic field. The precursor crystalline powder is melted and grown under a 1.2 T magnetic field. Textured samples are characterized by x-ray diffraction, scanning electron microscopy, electrical resistivity, and magnetic susceptibility. (C) 1996 American Institute of Physics. [less ▲]

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See detailMagnetic tunable confinement of the superconducting condensate in superconductor/ferromagnet hybrids
Aladyshkin, A Yu; Gillijns, W.; Silhanek, Alejandro ULg et al

in Physica C: Superconductivity (2008), 468(7-10), 737-740

The effect of a nonuniform magnetic field induced by a ferromagnet on the magnetoresistance of thin-film superconductor/ferromagnet hybrid structures was investigated experimentally. Two different ... [more ▼]

The effect of a nonuniform magnetic field induced by a ferromagnet on the magnetoresistance of thin-film superconductor/ferromagnet hybrid structures was investigated experimentally. Two different magnetic textures with out-of-plane magnetization were considered: a plain ferromagnetic film with bubble domains and a regular array of ferromagnetic dots. The stray fields of the structures are able to affect the spatial profile of the superconducting condensate, leading to a modification of the dependence of the critical temperature T-c on an external magnetic field H. We showed how the standard linear T-c(H) dependence with a single maximum at H = 0 can be continuously transformed into so-called reentrant phase boundary with two T-c peaks. We demonstrated that both domain-wall superconductivity and field-induced superconductivity are different manifestations of the magnetic confinement effect in various magnetic patterns. (C) 2008 Elsevier B.V. All rights reserved. [less ▲]

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See detailMagnetic Valley : a knowledge transfer project
Humbled, François; Rasson, Jean; Spassov, Simo et al

in Data Science Journal (2011), 10

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See detailMagnetically controlled ballistic deposition. A model of polydisperse granular packing
Trojan, K.; Ausloos, Marcel ULg

in Physica A-Statistical Mechanics and its Applications (2003), 326(3-4), 492-510

The flow and deposition of polydisperse granular materials is simulated through the magnetic diffusion limited aggregation (MDLA) model. The random walk undergone by an entity in the MDLA model is ... [more ▼]

The flow and deposition of polydisperse granular materials is simulated through the magnetic diffusion limited aggregation (MDLA) model. The random walk undergone by an entity in the MDLA model is modified such that the trajectories are ballistic in nature, leading to a magnetically controlled ballistic deposition (MBD) model. This allows to obtain important ingredients about a difficult problem that of the nonequilibrium segregation of polydisperse sandpiles and heterogeneous adsorption of a binary distribution of particles which can interact with each other and with an external field. Our detailed results from many simulations of MBD clusters on a two-dimensional triangular lattice above a flat surface in a vertical finite size box for binary systems indicates intriguing variations of the density, "magnetization", types of clusters and fractal dimensions. We derive the field and grain interaction-dependent susceptibility and compressibility. We deduce a completely new phase diagram for binary granular piles and discuss its complexity inherent to different grain competition and cluster growth probabilities. (C) 2003 Elsevier B.V. All rights reserved. [less ▲]

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See detailMagnetically controlled superconducting weak links
Van de Vondel, J.; Silhanek, Alejandro ULg; Raes, B. et al

in Applied Physics Letters (2009), 95(3),

We have designed and characterized a magnetic template which can be switched between chains of parallel and antiparallel field distribution by applying an in-plane magnetic field. The parallel field ... [more ▼]

We have designed and characterized a magnetic template which can be switched between chains of parallel and antiparallel field distribution by applying an in-plane magnetic field. The parallel field profile creates highly mobile vortex channels in a superconducting film deposited on top, reproducing the behavior of a weak link as evidenced by the presence of Shapiro steps in the current-voltage characteristics under rf excitation. The Josephson coupling can be fully suppressed by changing the field distribution to the antiparallel state. As a result, a reversible ON/OFF switch for magnetically induced weak links has been demonstrated. [less ▲]

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See detailMagnetically supported zeolite adsorbents for effluent treatment
Pramatarova, R.; Gaydardzhiev, Stoyan ULg

in Gaballah, Hager and Solozabal (Ed.) REWAS’99 - Proceedings of the Global Symposium on Recycling, Waste treatment and Clean Technology, San Sebastian, Spain, 2469-2474. (1999)

Zeolite adsorbents packed in magnetic carrier beds have been used for metals removal from synthetic multielemental effluent solution. Prolonged operation of the bed at high mass transfer rates and good ... [more ▼]

Zeolite adsorbents packed in magnetic carrier beds have been used for metals removal from synthetic multielemental effluent solution. Prolonged operation of the bed at high mass transfer rates and good regeneration degree have been achieved. Some of the loaded zeolite samples have been subjected to X-ray mapping for revealing the adsorption mechanism. [less ▲]

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See detailMagnetism and lattice dynamics of FeNCN compared to FeO
Herlitschke, M.; Tchougréeff, A. L.; Soudackov, A. V. et al

in New Journal of Chemistry (2014), 38(10), 4670-4677

Three-dimensional non-oxidic extended frameworks offer the possibility to design novel materials with unique properties, which can be different from their oxide analogues. Here, we present first ... [more ▼]

Three-dimensional non-oxidic extended frameworks offer the possibility to design novel materials with unique properties, which can be different from their oxide analogues. Here, we present first experimental results concerning unusual magnetic properties of FeNCN, investigated using Mössbauer spectroscopy and magnetometry between 5 and 380 K. This study reveals an unconventional behaviour of the magnetic parameters below the Néel temperature of 350 K, i.e., the hyperfine field on iron decreases with decreasing temperature. At room temperature, quadrupole and hyperfine magnetic field interaction energies are comparable in magnitude, which leads to a rare five-line absorption spectrum. We suggest that these features in the hyperfine field are caused by the combination of a small Fermi contact term and a temperature-dependent contribution from the orbital momentum and the dipole term. One additional spectral component is observed, which exhibits a magnetic relaxation behaviour and slows down at low temperatures to yield a sextet. The magnetometry data suggest that the antiferromagnetic FeNCN is rich in structural distortions, which results in a splitting of the field-cooled and zero-field-cooled curves. The lattice dynamics of FeNCN were investigated using nuclear inelastic scattering. The comparison of the obtained data with literature data of iron monoxide reveals very similar iron phonon modes with a small softening and a slightly reduced sound velocity. This journal is © the Partner Organisations 2014. [less ▲]

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See detailMagnetism in U2T2X compounds
Havela, Ladislav; Sechovsky, Vladimir; Svoboda, P. et al

in Journal of Magnetism & Magnetic Materials (1995), 140-144(2), 1367-1368

Magnetic and other electronic properties are presented for the U2T2X compounds (T = late transition metal, X = Sn or In), that crystallize in the tetragonal U3Si2-type structure. They show the formation ... [more ▼]

Magnetic and other electronic properties are presented for the U2T2X compounds (T = late transition metal, X = Sn or In), that crystallize in the tetragonal U3Si2-type structure. They show the formation of 5f magnetic moments and antiferromagnetic ordering in compounds where weak 5f-d hybridization is expected. Near the onset of magnetic ordering strongly enhanced γ-values are found. Neutron-diffraction experiments on U2Pd2Sn and U2Pd2In point to a connection between the mutual coordination of U atoms and the type of magnetic anisotropy [less ▲]

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See detailMagnetism in U2T2X compounds
Havela, Ladislav; Sechovsky, Vladimir; Svoboda, P. et al

Poster (1994, August)

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See detailMagnetization of 2-G Coils and Artificial Bulks
Coombs, Tim; Fagnard, Jean-François ULg; Matsuda, Koichi

in IEEE Transactions on Applied Superconductivity (2014), 24(5), 8201005

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See detailMagneto transport characterization of the Sn-doped TbMnO3 manganites
Pekala, Marek; Drozd, V.; Fagnard, Jean-François ULg et al

in Journal of Alloys & Compounds (2009), 467(1-2), 35-40

The structural, magnetic and electrical transport properties of the Sn-doped TbMnO3 manganites are studied by X-ray diffraction, ac susceptibility, dc magnetization and electrical resistivity measurements ... [more ▼]

The structural, magnetic and electrical transport properties of the Sn-doped TbMnO3 manganites are studied by X-ray diffraction, ac susceptibility, dc magnetization and electrical resistivity measurements. The Sn doping into the Tb and Mn sites of TbMnO3 compresses the unit cell and changes parameters of the antiferromagnetic phase whereas the magnetic moment of Mn are only weakly affected. The electrical resistivity of doped manganites is reduced and the activation energy EA is determined for the thermally activated conduction. [less ▲]

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See detailMagneto-optical trapping of iron atoms
Crauwels, Justine ULg; Huet, Nicolas ULg; Krins, Stéphanie ULg et al

in Belgian Physical Society Magazine (2016), 1

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See detailMagneto-optical trapping of iron atoms
Crauwels, Justine ULg; Huet, Nicolas ULg; Krins, Stéphanie ULg et al

Poster (2015, May 13)

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See detailMagneto-thermal coupling simulations -- Application to the SSM processing of steels
Rassili, A.; Geuzaine, Christophe ULg; Dular, Patrick ULg et al

in Proceedings of the 5th International Workshop on Electric and Magnetic Fields, EMF 2000 (2000)

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See detailMagneto-thermal phenomena in bulk high temperature superconductors subjected to applied AC magnetic fields
Vanderbemden, Philippe ULg; Laurent, Philippe ULg; Fagnard, Jean-François ULg et al

in Superconductor Science and Technology (2010), 23

In the present work we study, both theoretically and experimentally, the temperature increase in a bulk high temperature superconductor subjected to applied AC magnetic fields of large amplitude. We ... [more ▼]

In the present work we study, both theoretically and experimentally, the temperature increase in a bulk high temperature superconductor subjected to applied AC magnetic fields of large amplitude. We calculate analytically the equilibrium temperatures of the bulk sample as a function of the experimental parameters using a simple critical state model for an infinitely long type-II superconducting slab or cylinder. The results show the existence of a limit heat transfer coefficient (AUlim) separating two thermal regimes with different characteristics. The theoretical analysis predicts a ‘forbidden’ temperature window within which the temperature of the superconductor can never stabilize when the heat transfer coefficient is small. In addition, we determine analytical expressions for two threshold fields Htr1 and Htr2 characterizing the importance of magneto-thermal effects and show that a thermal runaway always occurs when the field amplitude is larger than Htr2. The theoretical predictions of the temperature evolution of the bulk sample during a self-heating process agree well with the experimental data. The simple analytical study presented in this paper enables order of magnitude thermal effects to be estimated for simple superconductor geometries under applied AC magnetic fields and can be used to predict the influence of experimental parameters on the self-heating characteristics of bulk type-II superconductors. [less ▲]

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See detailMagneto-transport characterization of Dy123 monodomain superconductors
Pekala, Marek; Mucha, Jan ULg; Vanderbemden, Philippe ULg et al

in Applied Physics A : Materials Science & Processing (2005), 81(5), 1001-1007

We consider textured materials of the DyBa2Cu3O7 type seeded with a Nd123 seed as initiator. They are grown with an excess 20% Dy211 phase on a Dy2O3 substrate. We report chemical characterization ... [more ▼]

We consider textured materials of the DyBa2Cu3O7 type seeded with a Nd123 seed as initiator. They are grown with an excess 20% Dy211 phase on a Dy2O3 substrate. We report chemical characterization, electrical resistivity, thermoelectric power and thermal conductivity over a broad temperature range as a function of an applied magnetic field up to 6 T. We show that specific features appear in the magneto-thermal transport properties, different in these materials from those found in single crystals and polycrystalline samples. We propose that two vortex regimes can be distinguished in the mixed phase, due to the intrinsic microstructure. We calculate the viscosity, entropy and figure of merit of the samples. [less ▲]

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