Distinct magnetic phases in structurally uniformSrCoO3−y

Abstract

Two magnetic phase transitions have been noted for SrCoO3−y for near-stoichiometric oxygen concentrations (small y). Using muon spin rotation and neutron scattering experiments, we have established that the two transitions represent separate, spatially distinct magnetic phases that coexist in a two-phase equilibrium mixture. The two phases most likely represent areas of the sample with different effective valence charge density. Further, the phases exist over regions with a length scale intermediate between nanoscale charge inhomogeneity and systems such as manganites or super-oxygenated cuprates with large length scale phase separation.

Defect Engineering of Photocatalysts for Solar Energy Conversion

“…The defects could be introduced into the semiconductors by plasma etching as a promising strategy. [80][81][82][83][84][85][86] For example, as-synthesized In 2 O 3Àx /In 2 S 3 layers with OVs were fabricated by plasma treatment ( Figure 6). According to the analysis of theory calculations and experimental observations, as-obtained In 2 O 3Àx /In 2 S 3 layers showed the excellent activities of broadbandlight PEC water splitting ( Figure 6).…”

“…[81] Moreover, the defects could also be introduced into the nanomaterials through a liquid-ammonia-assisted lithiation strategy. [82][83][84][85][86] For example, sulfur-vacancies-confined in ZnIn 2 S 4 (V s -ZnIn 2 S 4 ) nanosheets were fabricated through a lithiation-chemistry approach (Figure 7), manipulating the electronic structure and the PC performance of defective ZnIn 2 S 4 nanosheets. To promote the charge separation of ZnIn 2 S 4 , the high PC hydrogen generation rates, 6.884 and 11.9 mmol g À1 h À1 , were achieved using as-synthesized hybrids of MoS 2 quantum dots/V s -ZnIn 2 S 4 and Z-scheme NiS/WO 3 /V s -ZnIn 2 S 4 heterostructures due to the introduction of the defect and the construction of the heterostructure.…”

“…For instance, OVs and bismuth vacancies confined in BiPO 4 was produced by the regulation of the power and time of ball-milling process, promoting the PC property. [86] Thus, the synthesized strategy plays a pivot role upon the PC application of the defective photocatalysts.…”

Rational Fabrication of Hierarchical Z‐Scheme WO3/Bi2WO6 Nanotubes for Superior Photoelectrocatalytic Reaction

“…[11][12][13] As a visible light photocatalyst, bismuth tungstate (Bi 2 WO 6 ) has attracted much attention in photodegradation and photoelectrochemistry owning to its merits of chemical stability and long durability. [14,15] In terms of practical applications, the photoelectrocatalytic efficiency of Bi 2 WO 6 is still limited due to the lower charge mobility and poorer quantum yield. One impactful approach to tackle these bottlenecks is to construct the semiconductor heterojunctions with well-matched energylevels.…”

Fano‐Like Acoustic Resonance for Subwavelength Directional Sensing: 0–360 Degree Measurement

“…[8][9][10][11] Despite their promising performance, the bioinspired directional sensors based on such an internal coupling or structurally coupled resonators pose challenges associated with dedicated sensing components and a limited sensing range (i.e., from 0° only up to 180°).Pioneering metamaterial-based devices exhibit superior capability of acoustic wave control [12][13][14][15][16][17][18] and wave sensing. [1,2,[19][20][21][22] Particularly, directional sound reception in a narrow angle range (rejecting noise from the other angles) is enabled by topological insulator with valley polarized edge states [19] and phononic crystals. [20,21] In addition, acoustic Mie scatterers demonstrated azimuthally varying pressure field dependent on the incident angle, enabling to identify the incident angle by using a conventional microphone imbedded in the scatterer.…”