Pulsed laser synthesis of carbon-overdoped tungsten with a body-centered orthorhombic structure and planar defects

Abstract

C-overdoped W crystallites with a new body-centered orthorhombic (BCO) structure were synthesized by inward diffusion of C from a substrate upon pulsed laser heating in vacuum. Analytical electron microscopic observations indicated that the BCO-type W has occasional long-range ordering of atoms for the particulates, whereas {110}-shuffling for the nanocondensates tended to form a (111) 30°twist boundary and a IJ011)/IJ101) interface with a fair coincidence site lattice upon (hkl)-specific coalescence. The coexistent bcc-W nanocondensates have well-developed~{110} and~{112} vicinal surfaces to adjoin as tilt boundaries. The refractory phase assemblages have bimodal UV-visible absorptions for potential machining and optoelectronic/catalytic applications in a harsh environment.

Epitaxial growth of GaN films on lattice-matched ScAlMgO4substrates

“…After careful study, the epitaxial growth relationship GaNij0001]//SCAMij0001] and GaNij1−100]//SCAMij1−100], respectively, can be obtained. [29][30][31] These sharp and clear GaN diffraction patterns also confirm the high quality of GaN epitaxial films grown on SCAM substrates by PLD with the repetition rate of 30 Hz.…”

Epitaxial CuN Films with Highly Tunable Lattice Constant for Lattice‐Matched Magnetic Heterostructures with Enhanced Thermal Stability

“…Heterointerface always plays a significant role in the development of high‐performance devices . A common approach for improving the interface quality in the hybrid nanolayer structures takes advantage of inserting additional ultrathin layers between the magnetic and nonmagnetic layers, for example, a 1.1 nm layer of Fe between Mn–Ga and MgO, a 0.1 nm layer of Fe between Co 2 FeAl and MgO, and a 0.2 nm layer of NiAl between Co 2 FeGa 0.5 Ge 0.5 (CFGG) and Ag .…”