We present Lu${}_{2}$MnCoO${}_{6}$, a multiferroic member of the double perovskites that we have investigated using x-ray and neutron diffraction, specific heat, magnetization, electric polarization, dielectric constant measurements. This material possesses net polarization strongly coupled to magnetization below 35 K, despite antiferromagnetic ordering $S=3/2$ Mn${}^{4+}$ Co${}^{2+}$ spins in an $\ensuremath{\uparrow}\ensuremath{\uparrow}\ensuremath{\downarrow}\ensuremath{\downarrow}$...

The anisotropic physical properties of single crystals orthorhombic PtSn4 are reported for magnetic fields up to 140 kOe, applied parallel and perpendicular the crystallographic b-axis. susceptibility has an approximately temperature independent behavior reveals anisotropy between ac-plane Clear de Haas-van Alphen oscillations in as low 5 kOe at temperatures high 30 K were detected magnetization isotherms. thermoelectric power resistivity show strong field dependencies. A change H = is...

${R\mathrm{V}}_{6}{\mathrm{Sn}}_{6}$ $(R=\mathrm{Y}, \mathrm{Gd}\text{\ensuremath{-}}\mathrm{Tm}, \mathrm{Lu})$ single crystals are synthesized by the Sn-flux method and their physical properties characterized magnetization, resistivity, specific heat measurements. Powder x-ray diffraction patterns of all samples can be well indexed with hexagonal ${\mathrm{HfFe}}_{6}{\mathrm{Ge}}_{6}$-type structure, where rare-earth atoms form layers vanadium kagome layers. At high temperatures, magnetic...

We report the discovery of a metamagnetic phase transition in polar antiferromagnet Ni_{3}TeO_{6} that occurs at 52 T. The new accompanies colossal magnetoelectric effect, with magnetic-field-induced polarization change 0.3 μC/cm^{2}, value is 4 times larger than for spin-flop 9 T same material, and also comparable to largest magnetically induced changes observed date. Via density-functional calculations we construct full microscopic model describes data. spin structures all fields clarify...

In this paper, we present systematic measurements of the temperature and magnetic field dependencies thermodynamic transport properties Yb-based heavy fermion YbPtBi for temperatures down to 0.02 K with fields up 140 kOe address possible existence a field-tuned quantum critical point. Measurements magnetic-field- temperature-dependent resistivity, specific heat, thermal expansion, Hall effect, thermoelectric power indicate that AFM order can be suppressed by an applied...

Single crystals of Ba(Fe_(1-x)Mn_x)_2As_2, 0<x<0.148, have been grown and characterized by structural, magnetic, electrical transport thermopower measurements. Although growths single Ba(Fe_(1-x)Mn_x)_2As_2 for the full 0<=x<=1 range were made, we find evidence phase separation (associated with some form immiscibility) starting x>0.1-0.2. Our measurements show that whereas structural/magnetic transition found in pure BaFe_2As_2 at 134 K is initially suppressed Mn substitution,...

We report the observation of Shubnikov-de Haas (SdH) oscillations in single crystals Rashba spin-splitting compound BiTeI, from both longitudinal ($R_{xx}(B)$) and Hall ($R_{xy}(B)$) magnetoresistance. Under magnetic field up to 65 T, we resolved unambiguously only one frequency $F = 284.3\pm 1.3$ corresponding a Fermi momentum $k_{F} 0.093\pm 0.002$\AA$^{-1}$.The amplitude is strongly suppressed by tilting field, suggesting highly two-dimensional surface. Combining with optical...

The effect of pressure on the low-temperature states ${\mathrm{Re}}_{3}{\mathrm{Ge}}_{7}$ is investigated by both electrical and Hall resistance magnetization measurements. At ambient pressure, temperature-dependent behaves quasilinearly from room temperature down to 60 K, then undergoes a two-step metal-to-insulator transition (MIT) at temperatures ${T}_{1}=59.4\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ ${T}_{2}=58.7\phantom{\rule{0.16em}{0ex}}\mathrm{K}$, which may be related structural phase...

The development of Kondo lattice coherence in UTe2 leads to the formation a heavy Fermi-liquid state from which superconductivity emerges at lower temperature. In systems, nuclear magnetic resonance (NMR) and muon (μ+) Knight shift have proven be particularly sensitive properties developing heavy-electron fluid. Here we report μ+ measurements on high-quality single crystals grown by molten salt-flux method. Together with previous data crystal chemical-vapor transport method, our results show...

The development of Kondo lattice coherence in UTe2 leads to the formation a heavy Fermi liquid state from which superconductivity emerges at lower temperature. In systems, nuclear magnetic resonance (NMR) and muon Knight shift have proven be particularly sensitive properties developing heavy-electron fluid. Here we report measurements on high-quality single crystals grown by molten salt-flux method. Together with previous data crystal chemical-vapor transport method, our results show...

The magnetic-field response of the Mott-insulating honeycomb iridate ${\mathrm{Na}}_{2}{\mathrm{IrO}}_{3}$ is investigated using torque magnetometry measurements in magnetic fields up to 60 T. A peak-dip structure observed at corresponding an energy scale close zigzag ordering ($\ensuremath{\approx}15\phantom{\rule{0.28em}{0ex}}\mathrm{K}$) temperature. Using exact diagonalization calculations, we show that such a distinctive signature constrains effective spin models for these classes...

Dilation and thermopower measurements on YbAgGe, a heavy-fermion antiferromagnet, clarify refine the magnetic-field temperature ($H$-$T$) phase diagram reveal field-induced with $T$-linear resistivity. On low-$H$ side of this we find evidence for first-order transition suggest that YbAgGe at 4.5 T may be close to quantum critical end point. high-$H$ our results are consistent second-order suppressed point near 7.2 T. We discuss these in light global diagrams proposed Kondo lattice systems.

The upper critical fields, $H_{c2}$($T$), of single crystals the superconductor Ca$_{10}$(Pt$_{4-\delta}$As$_{8}$)((Fe$_{0.97}$Pt$_{0.03}$)$_{2}$As$_{2}$)$_{5}$ ($\delta$ $\approx$ 0.246) are determined over a wide range temperatures down to $T$ = 1.42 K and magnetic fields up $\mu_{0}H$ $\simeq$ 92 T. measurements anisotropic $H_{c2}$($T$) curves performed in pulsed using radio-frequency contactless penetration depth for field applied both parallel perpendicular \textbf{ab}-plane. Whereas...

We have studied the thermal, magnetic, and electrical properties of ternary intermetallic system ${\text{CeNiGe}}_{3}$ by means specific heat, magnetization, resistivity measurements. The heat data, together with anisotropic magnetic susceptibility, was analyzed on basis point charge model crystalline electric field. $J=5/2$ multiplet ${\text{Ce}}^{3+}$ is split field into three Kramers doublets, where second third doublets are separated from first (ground state) doublet...

An experimental setup was developed for the measurement of thermoelectric power (TEP, Seebeck coefficient) in temperature range from 2 to 350 K and magnetic fields up 140 kOe. The system built fit a commercial cryostat is versatile, accurate automated; using two heaters thermometers increases accuracy TEP measurement. High density data sweeps can be acquired within 16 h high isothermal field 0 kOe obtained h. Calibrations have been performed on platinum wire Bi2Sr2CaCu2O8 + δ high-Tc...

We investigated the occurrence and nature of superconductivity in single crystals YFe$_2$Ge$_2$ grown out Sn flux by employing x-ray diffraction, electrical resistivity, specific heat measurements. found that residual resistivity ratio (RRR) can be greatly improved, reaching as high $\sim$60, decanting from molten at $\sim$350$^\circ$C and/or annealing temperatures between 550$^\circ$C 600$^\circ$C. samples with RRR $\gtrsim$ 34 showed resistive signatures onset superconducting transition...

Single crystals of $R$Cd$_{3}$P$_{3}$ ($R$ = La and Ce) have been investigated by magnetization, electrical resistivity, Hall coefficient, specific heat. Magnetization measurements CeCd$_{3}$P$_{3}$ demonstrate clear quasi-2D magnetic behavior. Electrical resistivity coefficient suggest that compounds are low carrier density metallic systems, in strong contrast to an earlier study polycrystalline material. Specific heat reveal a high temperature (structural) phase transition at $T_{s} 127$~K...

We present the magnetic field dependencies of transport properties for $R$PtBi ($R$ = Gd, Dy, Tm, and Lu) half-Heusler compounds. Temperature dependent resistivity measurements high quality single crystals reveal an unusually large, non-saturating magnetoresistance (MR) up to 300 K under a moderate $H$ 140 kOe. At K, large MR effect decreases as rare-earth is traversed from Gd Lu dependence shows deviation conventional $H^{2}$ behavior. The Hall coefficient ($R_{H}$) $R$ indicates sign...

We report results from neutron scattering experiments on single crystals of YbBiPt that demonstrate antiferromagnetic order characterized by a propagation vector, ${\mathbit{\ensuremath{\tau}}}_{\mathrm{AFM}}$ = ($\frac{1}{2}\frac{1}{2}\frac{1}{2}$), and ordered moments align along the [1 1 1] direction cubic unit cell. describe in terms two-Gaussian peak fit, which consists narrower component appears below ${T}_{\mathrm{N}}\ensuremath{\approx}0.4$ K corresponds to magnetic correlation...

The observation of unusual metastable behavior in ${\mathrm{Ca}}_{3}{\mathrm{Co}}_{2}{\mathrm{O}}_{6}$ remains an ongoing puzzle. When the magnetic field is increased at certain very slow rates, evenly spaced steps occur magnetization and other physical quantities as a function every 1.2 T. ground state without approached by relaxation processes over hours to days. It striking example extremely dynamics arising from geometrical frustration otherwise clean long-range ordered system, its...

We report the experimental results of measurements thermoelectric power on ternary intermetallic compounds RAgSb(2) (R = Y, La, Ce, and Dy) over temperature range from 2 to 300 K in magnetic fields up 140 kOe. In this work, we present transport properties four materials same family with different ground states: a non-moment bearing paramagnetic metallic system (YAgSb(2)), charge density wave (LaAgSb(2)), local moment compound XY-like antiferromagnetic order tetragonal basal plane as well...