Enhancement of superconductivity near the ferromagnetic quantum critical point in UCoGe (2009)
Slooten, E., Naka, T., Gasparini, A., Huang, Y. K., De Visser, A.
We report a high-pressure single crystal study of the superconducting ferromagnet UCoGe. Ac-susceptibility and resistivity measurements under pressures up to 2.2 GPa show ferromagnetism is smoothly...
Huy, N. T., Huang, Y. K., De Visser, A.
Single-crystals of the new ferromagnetic superconductor UCoGe have been grown. The quality of as-grown samples can be significantly improved by a heat-treatment procedure, which increases the...
Muon spin rotation and relaxation in the superconducting ferromagnet UCoGe (2009)
De Visser, A., Huy, N. T., Gasparini, A., De Nijs, D. E., Andreica, D., Baines, C., ...
We report zero-field muon spin rotation and relaxation measurements on the superconducting ferromagnet UCoGe. Weak itinerant ferromagnetic order is detected by a spontaneous muon spin precession...
Thermal expansion of LaFeAsO: Evidence for high-temperature fluctuations (2009)
Wang, L., Kohler, U., Leps, N., Kondrat, A., Nale, M., Gasparini, A., ...
We present measurements of the thermal expansion coefficient alpha of polycrystalline LaFeAsO1-xFx (x = 0; 0.05; 0.1). The magnetic and structural transitions of the parent compound LaFeAsO give rise...
Ferromagnetic order in U(Rh,Co)Ge (2009)
We report the variation of ferromagnetic order in the pseudo-ternary compounds URh_{1-x}Co_{x}Ge (0 \leq x \leq 1). Magnetization and transport data taken on polycrystalline samples show that the...
Simultaneous suppression of ferromagnetism and superconductivity in UCoGe by Si substitution (2008)
De Nijs, D. E., Huy, N. T., De Visser, A.
We investigate the effect of substituting Si for Ge in the ferromagnetic superconductor UCoGe. Dc-magnetization, ac-susceptibility and electrical resistivity measurements on polycrystalline...
Superconductivity on the border of weak itinerant ferromagnetism in UCoGe. (2008)
Huy, N.T., Gasparini, A., De Nijs, D.E., Huang, Y., Klaasse, J.C.P., Gortenmulder, T., ...
72.Jahrestagung der Deutschen Physikalischen Gesellschaft und DPG Frühjahrstagung des Arbeitskreises Festkörperphysik, Fachverband Tiefe Temperaturen, Berlin, 25.-29.Februar 2008
Evolution of ferromagnetic order in URhGe alloyed with Ru, Co and Si. (2008)
Sakarya, S., Huy, N. T., Van Dijk, N. H., De Visser, A., Wagemaker, M., Moleman, A. C., ...
Journal of Alloys and Compounds, 457(2008) S.51-56
Ferromagnetic quantum critical point in URhGe doped with Ru (2007)
Huy, N.T., Gasparini, A., Klaasse, J.C.P., De Visser, A., Sakarya, S., Van Dijk, N.H.
Superconductivity on the border of weak itinerant ferromagnetism in UCoGe. (2007)
Huy, N.T., Gasparini, A., Ne Nijs, D.E., Huang, Y., Klaasse, J.C.P., Gortenmulder, T., ...
Physical Review Letters, 99(2007) S.067006/1-4
Evolution of ferromagnetic order in URhGe alloyed with Ru, Co and Si (2006)
Sakarya, S., Huy, N. T., Van Dijk, N. H., De Visser, A., Klaasse, J. C. P., Wagemaker, M., ...
We have investigated the evolution of ferromagnetic order in the correlated metal URhGe (Curie temperature $T_{\rm C} = $9.5 K) by chemical substitution of Ru, Co and Si. Polycrystalline samples...
Quantum critical behaviour of the plateau-insulator transition in the quantum Hall regime (2006)
De Visser, A., Ponomarenko, L. A., Galistu, G., Pruisken, A. M. M., Zeitler, U., ...
High-field magnetotransport experiments provide an excellent tool to investigate the plateau-insulator phase transition in the integral quantum Hall effect. Here we review recent low-temperature...
Kulbachinskii, V. A., Vasil'evskii, I. S., Lunin, R. A., Galistu, G., De Visser, A., Galiev, G. B., ...
Shallow GaAs/InGaAs/GaAs quantum well structures with and without a three monolayer thick AlAs central barrier have been investigated for different well widths and Si doping levels. The transport...
Ponomarenko, L. A., De Visser, A., Pruisken, A. M. M.
We have investigated the Hall resistance $R_H$ near the plateau-insulator transition of a two-dimensional electron gas in the quantum critical regime. High-field magnetotransport data taken on a...
Arapov, Yu. G., Neverov, V. N., Harus, G. I., Shelushinina, N. G., Yakunin, M. V., Kuznetsov, O. A., ...
For a two-dimensional (2D) hole system (confined within Ge layers of a multilayered p-Ge/Ge_{1-x}Si_x heterostructure) described by Luttinger Hamiltonian with the g-factor highly anisotropic for...
Thermal expansion of CeCU6-xAux (2004)
Estrela, P., De Visser, A., Stockert, O., Grube, K., Von Löhneysen, H.
Thermal expansion of CeCU6-xAux (2004)
Estrela, Pedro, De Visser, A., Stockert, O., Grube, K., Von Lohneysen, H.
CeCu6-xAux orders antiferromagnetically for x > 0.1. The ordering wave vector changes drastically between x = 0.4 and 0.5, while the Neel temperature T-N(x) varies linearly between x = 0.1 and 1.0....
Thermische Ausdehnung von CeCu§6§-§xAu§x. (2004)
Grube, K., Estrela, P., De Visser, A., Stockert, O., Löhneysen, H.von
Frühjahrstagung des Arbeitskreises Festkörperphysik (AKF) der DPG, Fachverband Tiefe Temperaturen, Regensburg, 8.-12.März 2004 (Poster)
Thermal expansion of CeCu§6§-§xAu§x. (2004)
Estrela, P., De Visser, A., Stockert, O., Grube, K., Löhneysen, H.von
Proc.of the Internat.Conf.on Magnetism (ICM 2003), Roma, I, July 27-31, 2003
Karmakar, B., Gokhale, M. R., Shah, A. P., Arora, B. M., De Visser, A., ...
In experiments on electron transport the macroscopic inhomogeneities in the sample play a fundamental role. In this paper and a subsequent one we introduce and develop a general formalism that...
New Insights into the Plateau-Insulator Transition in the Quantum Hall Regime (2003)
Ponomarenko, L. A., De Visser, A., Maude, D., Zvonkov, B. N., Lunin, R. A., ...
We have measured the quantum critical behavior of the plateau-insulator (PI) transition in a low-mobility InGaAs/GaAs quantum well. The longitudinal resistivity measured for two different values of...
Yakunin, M. V., Alshanskii, G. A., Arapov, Yu. G., Harus, G. I., Neverov, V. N., Shelushinina, N. G., ...
In In_xGa_{1-x}As/n-GaAs double quantum wells (DQWs) containing an electron gas, the magnetoresistance (MR) peculiarities under parallel magnetic fields caused by the passing of the tunnel gap edges...
Ponomarenko, L. A., De Visser, A., Kulbachinskii, V. A., Galiev, G. B., Künzel, H., ...
We have measured magnetotransport of the two-dimensional electron gas in a Hall bar geometry in the presence of small carrier density gradients. We find that the longitudinal resistances measured at...
High pressure transport study of non-Fermi liquid behaviour in U2Pt2In and U3Ni3Sn4 (2002)
De Visser, A., Estrela, Pedro, Naka, T.
The strongly correlated metals U2Pt2In and U3Ni3Sn4 show pronounced non-Fermi liquid (NFL) phenomena at ambient pressure. Here we review single-crystal electrical resistivity measurements under...
Kulbachinskii, V. A., Lunin, R. A., Rogozin, V. A., Mokerov, V. G., Fedorov, Yu. V., Khabarov, Yu. V., ...
We have investigated the optical and transport properties of MBE grown short-period superlattices of InAs/GaAs with different numbers of periods (3
Pressure-induced recovery of the Fermi-liquid state in the non-Fermi liquid material U2Pt2In (2002)
Estrela, Pedro, De Visser, A., Naka, T., De Boer, F. R., Pereira, L. C. J.
In the study of non-Fermi-liquid (NFL) phenomena in correlated metals, U2Pt2In is of special interest as it is one of the rare stoichiometric (undoped) materials that show NFL behaviour at ambient...
Pruisken, A. M. M., Ponomarenko, L. A., De Visser, A.
We report new experimental data on the plateau-insulator transition in the quantum Hall regime, taken from a low mobility InGaAs/InP heterostructure. By employing the fundamental symmetries of the...
Evidence for a Quantum Hall Insulator in an InGaAs/InP Heterostructure (2001)
Ponomarenko, L. A., De Visser, A., Possanzini, C., Olsthoorn, S. M., Pruisken, A. M. M.
We study the quantum critical behavior of the plateau-insulator (PI) transition in a low mobility InGaAs/InP heterostructure. By reversing the direction of the magnetic field (B) we find an averaged...
The Magnetic Susceptibility of Non-Interacting Nanoparticles (2001)
Ponomarenko, L. A., De Visser, A., Brück, E., Tishin, A. M.
We have calculated the low-field magnetic susceptibility $\chi$ of a system consisting of non-interacting mono-dispersed nanoparticles using a classical statistical approach. The model makes use of...
High-pressure study of the non-Fermi liquid material U2Pt2In (2001)
Estrela, Pedro, De Visser, A., Naka, T., De Boer, F. R., Pereira, L. C. J.
The effect Of hydrostatic pressure. (p less than or equal to 1.8 GPa) on the non-Fermi liquid statu Of U2Pt2In is investigated by electrical resistivity measurements in the temperature interval...
Recovery of the Fermi-liquid state in U3Ni3Sn4 by pressure (2001)
Estrela, Pedro, De Visser, A., De Boer, F. R., Naka, T., Shlyk, L.
Measurements of the resistivity of single-crystalline U3Ni3Sn4 under hydrostatic pressure up to 1.8 GPa are reported. We show that the temperature Tn, below which the resistivity obeys the...
Muon Localization Site in U(Pt,Pd)3 (2000)
Schenck, A, Keizer, RJ, De Visser, A, Amato, A, Andreica, A, Gygax, FN, ...
Crystal structure and physical properties of U3T3Sn4 (T = Ni, Cu) single crystals (2000)
Shlyk, L., Estrela, Pedro, Waerenborgh, J. C., De Long, L. E., De Visser, A., Rojas, D. P., ...
Heat capacity experiments, crystal structure determination and transmission electron microscopy have been carried out on U3Cu3Sn4 singlecrystals. U3Cu3Sn4 was confirmed to be a heavy-fermion...
Muon localization site in U(Pt,Pd)(3) (2000)
Schenck, A., Keizer, R. J., De Visser, A., Amato, A., Andreica, D., Gygax, F. N., ...
The angular and temperature (10-250 K) variation of the Knight shift of single-crystalline U(Pt0.95Pd0.05)(3) has been measured in transverse-field (B = 0.6T) mu SR experiments. By analyzing the...
Resistivity of non-Fermi liquid U2Pt2In under pressure (2000)
Estrela, Pedro, Naka, T., De Visser, A., De Boer, F. R., Pereira, L. C. J., Almeida, M.
Non-Fermi liquid behaviour in single-crystalline U2Pt2In has been studied by means of resistivity experiments (I parallel c) under hydrostatic pressure (P<1.5 GPa). At ambient pressure the...
Magnetic quantum critical point and superconductivity in UPt3 doped with Pd (2000)
De Visser, A., Graf, M. J., Estrela, Pedro, Amato, A., Baines, C., Andreica, D., ...
Transverse-field muon spin relaxation measurements have been carried out on the heavy-fermion superconductor UPt3 doped with small amounts of Pd. We find that the critical Pd concentration for the...
Non-Fermi-Liquid Behaviour in U2Pt2In (1999)
Estrela, Pedro, De Visser, A, De Boer, FR, Nieuwenhuys, GJ, Pereira, LCJ, Almeida, M
Non-Fermi-liquid behaviour of U3-xNi3Sn4-y single crystals (1999)
Shlyk, L., Waerenborgh, J. C., Estrela, Pedro, De Long, L. E., De Visser, A., Almeida, M.
U3Ni3Sn4 and U2.9Ni3.0Sn3.9 single crystals exhibit a non-Fermi-liquid susceptibility chi proportional to T-0.3 between 1.7 and 10 K. The electronic heat capacity coefficient gamma(T) of...
Non-Fermi Liquid Behavior and Griffiths Phase in U3-xNi3Sn4-y Single Crystals (1999)
Shlyk, L., De Long, L.E., Waerenborgh, J.C., Almeida, M., Estrela, Pedro, De Visser, A.
Non-Fermi Liquid Behavior in U3-xNi3Sn4-y Single Crystals (1999)
Shlyk, L., Waerenborgh, J.C., Estrela, Pedro, De Long, L.E., De Visser, A., Almeida, M.
Probing the plateau-insulator quantum phase transition in the quantum Hall regime (1998)
De Visser, A., Olsthoorn, S., Wei, H. P., Pruisken, A. M. M.
We report quantum Hall experiments on the plateau-insulator transition in a low mobility In_{.53} Ga_{.47} As/InP heterostructure. The data for the longitudinal resistance \rho_{xx} follow an...
Structural, magnetic and transport properties of single-crystalline U2Pt2In (1998)
Estrela, Pedro, Pereira, L. C. J., De Visser, A., De Boer, F. R., Almeida, M., Godinho, M., ...
Single crystals of the heavy-electron compound U2Pt2In have been grown by a modified mineralization technique. The x-ray structure refinement shows that U2Pt2In single crystals form in the Zr3Al2...
Stacking faults in UPt3 (1993)
Aronson, M. C., Clarke, Roy, Demczyk, Brain G., Coles, B. R., Smith, J. L., De Visser, A., ...
Atomic resolution transmission electron microscopy and X-ray diffraction measurements have been combined to investigate the microstructure of superconducting UPt3. Regions of a second double...
HIGH-FIELD MAGNETISATION OF HEAVY-FERMION U (Pt0.95Pd0.05)3 (1988)
De Visser, A., Van Sprang, M., Menovsky, A., Franse, J.
The high-field anomaly in antiferromagnetic heavy-fermion U (Pt0.95Pd0.05)3 has been investigated by means of magnetisation measurements up to 18 T. The metamagnetic-like transition (at ~ 12 T at T =...
THERMAL EXPANSION OF HEAVY-FERMION CeRu2Si2 (1988)
De Visser, A., Haen, P., Lejay, P., Flouquet, J.
The coefficients of linear thermal expansion of single-crystalline samples of the tetragonal heavy-fermion compound CeRu2Si2, and its non-magnetic analog LaRu2Si2, have been measured in the...
HIGH-FIELD MAGNETISATION OF HEAVY-FERMION U (Pt0.95Pd0.05)3 (1988)
De Visser, A., Van Sprang, M., Menovsky, A., Franse, J.
The high-field anomaly in antiferromagnetic heavy-fermion U (Pt0.95Pd0.05)3 has been investigated by means of magnetisation measurements up to 18 T. The metamagnetic-like transition (at ~ 12 T at T =...
THERMAL EXPANSION OF HEAVY-FERMION CeRu2Si2 (1988)
De Visser, A., Haen, P., Lejay, P., Flouquet, J.
The coefficients of linear thermal expansion of single-crystalline samples of the tetragonal heavy-fermion compound CeRu2Si2, and its non-magnetic analog LaRu2Si2, have been measured in the...
Electron-phonon coupling in uranium compounds. (1985)
Yoshizawa, M., Luethi, B., Goto, T., Suzuki, T., Renker, B., De Visser, A., ...
Proc.of the 5th Internat.Conf.on Crystalline Field and Anomalous Mixing Effects in f-Electron Systems, Sendai, J, April 15-18, 1985