Determination of the $T_{c}$ by Using the Interaction between a Permanent Magnet and a High-$T_{c}$ Superconductor

New insights into the synthesis of Sillén–Aurivillius oxyhalides: molten salts induce interlayer halogen competing reaction

“…The Raman shifts at 160 and 455 cm −1 can be related to the Bi–O bond, while that at 223, 455, and 685 cm −1 are ascribed to the Bi–X (X = Cl, Br) bond, [Bi 2 O 2 ] 2+ layers, and Bi–Ti/Nb–O bonds, respectively. 37–39 Meanwhile, the Raman shifts at 560 and 826 cm −1 are assigned to the Nb–O bonds in the NbO 6 octahedra, further confirming the successful synthesis of the BaBi 4 TiNbO 11 X (X = Cl, Br) oxyhalides.…”