The high upper critical field and low anisotropy of iron-based superconductors make them being particularly attractive for high-field applications. However, the current carrying capability needs to be enhanced by overcoming weak-link effect between misaligned grains inside wire tape conductors. Here we demonstrate a transport density (Jc) reaching 1.5x10^5 A/cm^2 (Ic = 437 A) at 4.2 K 10 T in Ba0.6K0.4Fe2As2 (Ba-122) tapes prepared combination conventional powder-in-tube method optimized...

Coronavirus disease 2019 (COVID-19) affected people worldwide, and fever is one of the major symptoms this disease. Although Acetaminophen (APAP) a common fever-reducing medication, it can also mediate liver injury. However, role PGC-1α in regulating mitochondrial quality control by lactate dehydrogenase B (LDHB), vital enzyme catalyzing conversion to pyruvate, APAP-induced hepatotoxicity, unclear. Here, gene expression omnibus data patients with injury were used explore profiles. AML12...

Abstract Superconducting round wires with isotropic architecture are preferred in fabrications of cables and magnets. To diminish the obstacles to supercurrent, e.g., voids, cracks bubbles, over-pressure heat treatment or hot isostatic pressing is indispensable final annealing process. Here, we fabricated a stainless steel/Cu/Ag sheathed Ba 0.6 K 0.4 Fe 2 As superconducting wire without aid high-pressure sintering. It was found that high-strength outer sheaths groove rolling synergistically...

The preparation of ultra-high-performance concrete (UHPC) with both high-early-strength and good workability contributes to further promotion its development application. This study investigated the effects different accelerators (SM, alkaline powder accelerator; SF, accelerator containing fluorine; AF, alkali-free liquid fluorine) on strength properties UHPC. microstructure UHPC was also characterized by using XRD SEM. Several dosage levels (2%, 4%, 6%, 8% mass) were selected. results...

The development of ultraviolet (UV) nonlinear optical (NLO) crystals demands materials with wide energy band gaps. Here we report first-principles studies on the electronic structures in several UV NLO borates representative structures. Combined model analysis, find that oxygen non-bonding 2p orbitals play an important role top valence bands. gap can be adjusted by modifying coordination environment around atoms. Under ideal conditions gaps achieve 9 eV if are totally eliminated, despite...

High critical current density $({J}_{c})$ values in superconducting wires/tapes are desirable for high magnetic field applications. Recently developed pnictide exhibit exceptional properties such as temperature $({T}_{c})$, upper $({H}_{c2})$, and almost field-independent ${J}_{c}$. Despite the great fabrication efforts, however, newly discovered still not able to replace low-temperature superconductors $\mathrm{N}{\mathrm{b}}_{3}\mathrm{Sn}$, due their inferior ${J}_{c}$ values. Ag-clad...

Iron-based superconductors have become a promising candidate for high-field applications due to their high transition temperature, ultra-high upper critical field, and low anisotropy. For practical applications, it is important improve the transport Jc lower cost of superconductors. In this paper, with groove rolling hot isostatic pressing (HIP) process, Cu/Ag composite sheathed (Ba, K)Fe2As2 powder-in-tube round wires was increased 4.7 × 104 A cm−2 at 10 T 4.2 K. The utilization HIP process...

Abstract Par‐4 is a 38‐kD protein pivotal to the apoptotic pathways of various cell types, most notably prostate cells and neurons, where it has been linked cancer neurodegenerative disorders including Alzheimer's Huntington's diseases HIV encephalitis. The C‐terminal region responsible for homodimerization ability interact with proposed effector molecules. In this study, we show that 47 residues are natively unfolded at physiological pH temperature. Evidence rapidly accumulating proteins...

Topological materials have novel properties both in their bulk and boundaries, thereby attracting a wide interest the theoretical experimental communities. The recent development of topological quantum chemistry symmetry-based indicator theory this field has significantly simplified procedure for determining nonmagnetic crystalline materials. Accordingly, large number new been found by scanning crystal databases. This study provides details on algorithm used Catalogue Electronic Materials....

We have studied vortex pinning and dynamics in a Sr0.6K0.4Fe2As2 superconducting tape with critical current density Jc ∼ 0.1 MA/cm2 at 4.2 K 10 T. It is found that grain boundary dominant the mechanism. Furthermore, we observe large of dislocations which can also serve as effective centers. find temperature dependence agreement model vortices pinned via spatial fluctuation charge carrier mean free path. Magnetic relaxation measurement indicates magnetization depends on time logarithmic way....

CaKFe4As4 superconducting tapes are fabricated via different techniques to enhance grain connectivity. The critical current density, Jc, increases exponentially with the Vickers hardness of core. Jc (4.2 K, 10 T) hot isostatic pressed Cu/Ag-sheathed tape reaches 2.2 × 104 A cm−2, while that stainless steel/Ag-sheathed surpasses cm−2. However, silver infiltrates from sheath far into center core and reacts phase, which has significant ramifications for transport current. We suggest great...

The phase separation commonly exists in Fe(Se, Te) and damages their superconducting performance. In this paper, we successfully tuned the via adding FeF2 to raw materials. A macroscopically ordered which exhibited submillimetre scale striations width arranged along c-axis was formed FeF2-added Te), different from observed flower shape FeF2-free Te). Moreover, two macroscopical separated phases were identified as FeSe0.6Te0.4 FeSe0.4Te0.6. regular morphology fixed composition enhanced flux...

We present the electrical properties of polycrystalline La0.7−xPrxSr0.3MnO3 in which average ionic radius A site 〈rA〉 is systematically varied while keeping carrier concentration fixed. Below Curie temperature Tc, spin-disorder scattering process has been regarded to play an important role resistivity. With decreasing 〈rA〉, structure transition from rhombohedral orthorhombic phase accompanied with sharp increase resistivity at Tc and activation energies observed.

Iron-based superconductors are very promising candidates for high-field applications owning to their ultrahigh upper critical field (Hc2) and small anisotropy. For practical application, wires tapes with high mechanical strength essential. In this work, using Monel alloy as an outer reinforcing sheath, 7-filament Sr1−xKxFe2As2/Ag/Monel composite various thicknesses were developed based on the powder-in-tube method. Through microhardness characterization, it is found that transport current...

Iron-based superconductors (IBSs) with ultrahigh upper critical fields and low anisotropies have attracted significant attention in terms of the novel mechanism superconductivity high-field applications. A major concern for practical research is fabrication long wires enhanced current density cost. In this paper, Cu/Ag composited sheathed Ba0.6K0.4Fe2As2 (Ba122) tapes were fabricated through a hot isostatic pressing method, which feasible long-wire manufacturing. The composite sheath can...

Understanding the mechanisms that limit current transport in granular iron-based superconductors is necessary to unlock their potential for magnet applications. This paper reports critical surface IC(T,H) of powder-in-tube Ag/Ba1−xKxFe2As2 tapes densified by flat rolling and uniaxial hot pressing. We investigate amplitude isothermal-IC(H)-curve magnetic hysteresis, which a marker electrical connectivity between superconducting grains. allows us demonstrate that, spite an improved...

BaAlBO 3 F 2 (BABF) crystal is a recently developed borate nonlinear optical crystal. However, re-examination has revealed different space group from that previously measured. Since the newly and measured structures are very similar, their structural stabilities compared by plane-wave pseudopotential method, calculations confirm correctness of recent measurement. Furthermore, electronic linear properties BABF theoretically studied. The calculated refractive indices birefringence in good...