Intrinsic nanostructural domains: Possible origin of weaklinkless superconductivity in the quenched reaction product of Mg and amorphous B

Abstract

Smooth modulation structure of Mg–B alloy in the quenched reaction product of Mg and amorphous B was studied. It indicates that the MgB2 formed possibly in spinodal decomposition, thus resulting in MgB2 nanodomains. It was found that the nanodomains with small angle boundaries of atomic-scale width were distributed within the subgrains that constitute the clusters in MgB2 grains. This nanostructural characteristic may be intrinsic in the quenched reaction product of Mg and amorphous B. It makes the nanodomain boundaries not act as barriers to the current percolation path, thus exhibiting no weak-link problem in the MgB2.

Magnetism and Antiferroelectricity inMgB6

“…In addition the small Mg ionic radius, second only to Be among the alkalines, may result in a high ionic mobility and thus in Mg segregation. However, in contrast to this early prediction MgB 6 has been often observed experimentally [18], most notably with conclusive high resolution tunnelling electron microscopy [19]. In this letter we report on a density functional theory (DFT) study of the structural, electronic and magnetic properties of V B -rich MgB 6 .…”

Coordination-Resolved Electron Spectrometrics

“…For the readers' convenience, each section starts with key points synopsizing discussions. tivity, 35,36 thermal stability, 37,38 wettability, 39,40 water and ice skin supersolidity, 41,42 etc.…”

Electrochemical Synthesis of Magnesium Hexaboride by Molten Salt Technique

“…This may be the reason for the formation of intermediate phase MgB 6 [ 44 ]. Li et al described the diffusion of Mg vapour into boron creating a complex of Mg–B supersaturated solution, encompassing the formation of nonequilibrium MgB 6 [ 45 ]. Lee et al and J. Q. Li also authenticated with S. Li [ 45 ] and postulated that the path of the reaction of supersaturated Mg–B cluster complex via spinodal decomposition leads to the formation of hypothetical phase MgB 6 [ 46 , 47 ].…”