Materials Literature
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In this paper, we present the magnetic properties of 2b3CuCl22H2O (b = betaine, C5H11NO2). 2b3CuCl22H2O is the first model substance for a two-dimensional S = 1/2 orthogonal antiferromagnetic trimer system. We have performed magnetic susceptibility, magnetization curve, and specific heat under extreme conditions: low…
We have studied an "isoelectronic" Fe-site doping with Cr and Ni in Ba(Fe 1–x Cr x/2 Ni x/2 ) 2 As 2 system. With increasing x, the antiferromagnetic SDW in the parent compound is suppressed quickly. Spin glass state emerges in the range of 0.1 ≤ x < 0.2. The spin glass state evolves into cluster glass with further do…
Magnetic and thermodynamic properties of a selenide FeCr 2 Se 4 have been investigated. Electric resistivity ρ ( T ) shows insulator-type temperature dependence defined as ∂ρ ( T )/ ∂T < 0 in the range 2.5 <T < 300 K At T N ∼ 200 K, ρ ( T ) has an inflection point associated with antiferromagnetic order. A cusp-like a…
Using an ac susceptometry technique, H−T phase diagrams were determined for various Pt contents in the noncentrosymmetric superconducting system Li 2 (Pd 1− x Pt x ) 3 B, from which several superconducting parameters could be extracted. Despite the end compositions having very different band and gap structure and desp…
Objetivo: Identificar la dinámica del ensamble algal epifítico a través del pulso de inundación durante tres ciclos hidrológicos en una planicie inundable tropical. Materiales y métodos: En diferentes fases del pulso de inundación entre los años 2006 y 2009 se realizaron nueve muestreos donde se evaluó la variación es…
A multi-band model within the BCS framework is proposed for the description of iron-based oxypnictide superconductors. A s-wave pairing symmetry and different doping values are considered. This model is used to describe some properties of the oxypnictide SmFeAsO1−x Fx superconductor. The electron-phonon coupling of th…
The objective of this study was to evaluate and compare the energy absorption characteristics of W6x8.5 (W152x12.6) posts at a reduced embedment depth of 36 in. (914 mm) to that of the standard 40-in. (1,016-mm) embedded W6x8.5 (W152x12.6) posts used in the original Midwest Guardrail System (MGS). A total of eight dyn…
The Heusler compound Fe 2 MnSi exhibits a ferromagnetic transition at T C ∼ 220 K, and, below, another magnetic transition at T R ∼ 65 K, which is supposed to be a ferrimagnetic transition. In this study we investigate the effects of the substitution of Co and V for Fe and Mn, respectively, on these transitions. The t…
We report the induced superconductivity by Fe-doping in charge-density-wave (CDW) system 1 T -TaS 2 and discuss the interplay between CDW and superconductivity. The grown 1 T -phase Fe x Ta 1− x S 2 (0 ≤ x ≤ 0.05) single crystals are experimentally measured and the electronic structures are calculated by density funct…
Our cantilever-detected electron spin resonance (ESR) technique is motivated for terahertz ESR spectroscopy of a tiny single crystal at low temperature. In this technique, ESR signal is detected as deflection of a sample-mounted cantilever, which is sensitively detected by built-in piezoresistors. So far, ESR detectio…
Surfactant-containing periodic mesostructured silica materials, namely SBA-16 and FDU-12, were studied under pressures between 1 and 4 GPa and temperatures between 100 and 400 °C. At 4 GPa crystallization of coesite can be achieved already at 200 °C. The mild transition of amorphous to crystalline silica is believed t…
We report measurements and theoretical calculations of the magnetocaloric properties of low-dimensional spin-1/2 antiferromagnets close to their magnetic field-induced quantum critical points. We demonstrate that the accumulation of entropy around the quantum critical point, giving rise to a critically enhanced magnet…
We have carried out the electrical resistivity measurements under high pressures up to 24 GPa for CeTX 3 (T: Co and Ir, X: Si and Ge), CePd 5 Al 2 and YbIr 2 Zn 20 in order to investigate quantum criticality and superconductivity. Antiferromagnets CeTX 3 with the non-centrosymmetric tetragonal structure show supercond…
A new superconductor ZnNNi 3 with T c of about 3 K has the same anti-perovskite-type such as MgCNi 3 and CdCNi 3 . For this new superconductor, we have studied the Ni-site doping effect with the formula of ZnNNi 3-x M x . The dopant elements M are chosen to be Cu, Co, Fe, Mn, Cr, and V In Mn and Fe doping, only by x=0…
It was carried out a theoretical and experimental study of the m -cresol degradation in aqueous solution using a non-thermal plasma induced by dielectric barrier discharge. For the experimental setup a coaxial reactor vertically placed was used. Wherein a liquid solution flowing inside the internal electrode was impel…
We present electrical resistivity as well as scanning tunneling microscopy and spectroscopy (STM/S) studies on Fe 1.11 Te single crystals. For this composition, a first-order phase transition is observed around 57 K This transition is associated with a structural change from the tetragonal P 4/ nmm to the monoclinic P…
We show that in three-dimensional (3D) topological insulator Bi 2 Te 3 , the surface nature is revealed as a quantization of motion in Dirac fermions due to their confinement at the surface. The consequence of this z-quantization is the oscillation in magnetoresistance (MR) with periodicity proportional to the magneti…
A selection of suitable microstructures is critical to fabrication and properties of superhydrophobic surfaces (SHS). In this study, we introduce a three‐dimensional droplet model to thermodynamically analyze the superhydrophobic properties for the purpose of determining the second step of a two‐step microstructure su…
Numerous experimental techniques and computational studies, proposed in recent times, have revolutionized the understanding of protein-folding paradigm. The complete understanding of protein folding and intermediates are of medical relevance, as the aggregation of misfolding proteins underlies various diseases, includ…
A multi-step thermal decomposition of a molecular precursor, {N(n-C4H9)4[FeIIFeIII(C2O4)3}? has been studied using non-isothermal thermogravimetry (TG) measurements in the temperature range 300 to ~800 K at multiple heating rates (5, 10 and 20 K min-1). The thermal decomposition of the oxalate-based complex proceeds s…