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Torque magnetometry studies of metamagnetic transitions in single-crystal HoNi_{2}B_{2}C and ErNi_{2}B_{2}C at T\approx 1.9 K
D. G. Naugle, B. I. Belevtsev, K. D. D. Rathnayaka +3
The metamagnetic transitions in single-crystal rare-earth nickel borocarbide HoNi_{2}B_{2}C and ErNi_{2}B_{2}C have been studied at 1.9 K with a Quantum Design torque magnetometer.…
Low Temperature Thermodynamic Properties of the Heavy Fermion Compound YbAgGe Close to the Field-Induced Quantum Critical Point
Y. Tokiwa, A. Pikul, P. Gegenwart +3
We present temperature and field dependent heat capacity and magnetization data taken at temperatures down to 50 mK and in an applied magnetic field up to 11.5 Tesla for YbAgGe, a…
A small sealed Ta crucible for thermal analysis of volatile metallic samples
Y. Janssen, M. Angst, K. W. Dennis +2
Differential thermal analysis on metallic alloys containing volatile elements can be highly problematic. Here we show how measurements can be performed in commercial, small-sample,…
Direct observation of Fe spin reorientation in single crystalline YbFe6Ge6
M. A. Avila, T. Takabatake, Y. Takahashi +2
We have grown single crystals of YbFe6Ge6 and LuFe6Ge6 and characterized their anisotropic behaviour through low field magnetic susceptibility, field-dependent magnetization, resis…
Local superconducting density of states of ErNi2B2C
M. Crespo, H. Suderow, S. Vieira +2
We present local tunnelling microscopy and spectroscopy measurements at low temperatures in single crystalline samples of the magnetic superconductor ErNi2B2C. The electronic local…
Phonon-induced quadrupolar ordering of the magnetic superconductor TmNiBC
N. H. Andersen, J. Jensen, T. B. S. Jensen +6
We present synchrotron x-ray diffraction studies revealing that the lattice of thulium borocarbide is distorted below T_Q = 13.5 K at zero field. T_Q increases and the amplitude of…
Electronic structure and anisotropic transport properties in hexagonal YPtIn and LuAgGe ternary compounds
G. D. Samolyuk, S. L. Bud'ko, E. Morosan +2
We present anisotropic, zero applied magnetic field, temperature dependent resistivity measurements on hexagonal, non-magnetic, YPtIn and LuAgGe single crystals. For these material…
Field-Dependent Hall Effect in Single Crystal Heavy Fermion YbAgGe below 1K
S. L. Bud'ko, V. Zapf, E. Morosan +1
We report the results of a low temperature (T >= 50 mK) and high field (H <= 180 kOe) study of the Hall resistivity in single crystals of YbAgGe, a heavy fermion compound that demo…
Effects of Neutron Irradiation on Carbon Doped MgB2 Wire Segments
R. H. T. Wilke, S. L. Bud'ko, P. C. Canfield +4
We have studied the evolution of superconducting and normal state properties of neutron irradiated Mg(BC) wire segments as a function of post exposure anneali…
Synthesis of Mg(BC) Powders
R. H. T. Wilke, S. L. Bud'ko, P. C. Canfield +2
We have synthesized bulk Mg(BC) from a mixture of elemental Mg, B, and the binary compound BC. Carbon incorporation was dramatically improved by a two step reac…
Field-induced non-Fermi-liquid resistivity of stoichiometric YbAgGe single crystals
P. G. Niklowitz, G. Knebel, J. Flouquet +2
We have investigated hexagonal YbAgGe down to 70 mK by measuring the magnetic-field and temperature dependence of the resistivity rho of single crystals in fields up to 14 T. Our r…
Superconducting and Normal State Properties of Neutron Irradiated MgB2
R. H. T. Wilke, S. L. Bud'ko, P. C. Canfield +2
We have performed a systematic study of the evolution of the superconducting and normal state properties of neutron irradiated MgB wire segments as a function of fluence and po…
Differential thermal analysis and solution growth of intermetallic compounds
Y. Janssen, M. Angst, K. W. Dennis +2
To obtain single crystals by solution growth, an exposed primary solidification surface in the appropriate, but often unknown, equilibrium alloy phase diagram is required. Furtherm…
Magnetic field-induced quantum critical point in YbPtIn and YbPtIn single crystals
E. Morosan, S. L. Bud'ko, Y. A. Mozharivskyj +1
Detailed anisotropic (Hab and Hc) resistivity and specific heat measurements were performed on online-grown YbPtIn and solution-grown YbPtIn single c…
Distinct order of Gd 4f and Fe 3d moments coexisting in GdFe4Al8
M. Angst, A. Kreyssig, Y. Janssen +7
Single crystals of flux-grown tetragonal GdFe4Al8 were characterized by thermodynamic, transport, and x-ray resonant magnetic scattering measurements. In addition to antiferromagne…
Kondo Insulator description of spin state transition in FeSb2
C. Petrovic, Y. Lee, T. Vogt +3
The thermal expansion and heat capacity of FeSb2 at ambient pressure agrees with a picture of a temperature induced spin state transition within the Fe t_{2g} multiplet. However, h…
Comment on: "Band Filling and Interband Scattering Effects in MgB2: Carbon versus Aluminium Doping"
P. Samuely, P. Szabo, P. C. Canfield +1
In a recent Physical Review Letter Kortus et al. claim that the observed decrease of in Al and C doped MgB samples is mainly due to the band filling by the electron dopin…
Evaluation of a long-time temperature drift in a commercial Quantum Design MPMS SQUID magnetometer using GdO as a standard
S. L. Bud'ko, P. C. Canfield
The long-time temperature drift in a commercial Quantum Design MPMS SQUID magnetometer was evaluated using time-dependent magnetization measurements of GdO. In contrast to…
Unpaired Electrons in the Heavy-Fermion Superconductor CeCoIn_{5}
M. A. Tanatar, Johnpierre Paglione, S. Nakatsuji +9
Thermal conductivity and specific heat were measured in the superconducting state of the heavy fermion material Ce_{1-x}La_{x}CoIn_{5}. With increasing impurity concentration x, th…
Interplay of magnetic ordering and CEF anisotropy in the hexagonal compounds RPtIn, R = Y, Gd - Lu
E. Morosan, S. L. Bud'ko, P. C. Canfield
Single crystals of RPtIn, Y, Gd - Lu were grown out of In-rich ternary solution. Powder X-ray diffraction data on all of these compounds were consistent with the hexagonal Zr…