Synthesis and magnetic properties in quaternary Ca_1−x Pr _x Co₂As₂ single crystals

Abstract

Series of Ca1−x Pr x Co2As2 (x = 0, 0.10, 0.25, 0.4, 0.6, 0.75, 0.85, 1) single crystals have been synthesized in order to clarify the variation of magnetic order from antiferromagnetic (AFM) in CaCo2As2 to ferromagnetic (FM) in PrCo2As2. It is found that the lattice constant of c-axis are contracted with the introduction of Pr into Ca sites in CaCo2As2. Electronic transport measurements reveal the metallicity in this system. Systematic magnetic measurements and analysis show that substituting only 10% of Pr for Ca changes the magnetic ground state from A-type AFM ordering of Co magnetic moment in CaCo2As2 to FM ordering in Ca1−x Pr x Co2As2 (0.1 ⩽ x ⩽ 1). Most importantly, the abrupt drop of low temperature magnetic susceptibility below T FiM with x ⩾ 0.25 and the observed magnetic pole reversal with x ⩾ 0.4 suggests an AFM coupling between Co 3d and Pr 4f magnetic sublattice. Finally, a detailed magnetic phase diagram in this system has been obtained.

Genome-Wide Identification of the Physic Nut WUSCHEL-Related Homeobox Gene Family and Functional Analysis of the Abiotic Stress Responsive Gene JcWOX5

“…Following the classification of WOX genes from Arabidopsis, rice, and soybean (van der Graaff et al, 2009), JcWOX genes of physic nut were classified into three clades, termed the WUS, intermediate, and ancient clade (Figure 1). In addition, the WUS clade had the largest members compared to other plants such as rice (van der Graaff et al, 2009), Arabidopsis (van der Graaff et al, 2009), poplar (Zhang et al, 2010), and cotton (He et al, 2019). These results show that the WUS clade is highly conserved in physic nut and other plants, confirming previous studies (van der Graaff et al, 2009).…”

“…The exon-intron organization can be used as supporting evidence to determine the evolutionary relationships among genes or organisms. The exon-intron splicing arrangement and intron numbers in the JcWOX genes were similar to those reported in Arabidopsis (van der Graaff et al, 2009), cotton (He et al, 2019), and poplar (Zhang et al, 2010). For example, the members of ancient clade had two introns (Figure 2); similar results are also found in Arabidopsis and other plants (van der Graaff et al, 2009).…”

“…For example, the members of ancient clade had two introns (Figure 2); similar results are also found in Arabidopsis and other plants (van der Graaff et al, 2009). The motif analysis showed that motifs 1 and 2 were uniformly observed in all JcWOX proteins (Supplementary Figure S3), similar to Arabidopsis (van der Graaff et al, 2009), cotton (He et al, 2019), rape (Li et al, 2019), and poplar (Zhang et al, 2010). This result indicated that the evolution of WOX transcription factors was conserved in plant development.…”

“…Members of the WOX gene family have been comprehensively identified or predicted in many plants, such as Arabidopsis, maize, soybean, rice etc. (van der Graaff et al, 2009;Zhang et al, 2010;Hao et al, 2019). Plant WOX genes have been found to be involved in diverse biological and physiological processes in regulating plant development (Ueda et al, 2011;Costanzo et al, 2014).…”

Visibly Transparent Radiative Cooler under Direct Sunlight

“…The emitter is a 50 μm‐thick PDMS layer, that is known to have selective emissivity in the AW as a consequence of optical phonon resonance. [ 43 ] The multilayer of a‐Si:H and SiO 2 are fabricated using plasma‐enhanced chemical vapor deposition (PECVD), [ 44 ] followed by spin‐coating of the PDMS (see Section 4). Scanning electron microscopy images show that all six layers are deposited well (Figure 1e).…”