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X-RAY DIFFRACTION STUDY ON THE CRYSTAL STRUCTURE OF <font>Sm</font><sub>1+x</sub><font>Ba</font><sub>2−x</sub><font>Cu</font><sub>3</sub><font>O</font><sub>7−y</sub>
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1988
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X-ray CrystallographyCrystal StructureEngineeringSolid-state ChemistryChemistrySuperconductivityQuantum MaterialsMaterials SciencePhysicsCrystalline DefectsCrystal MaterialBa 2−XCrystallographyCrystal Structure DesignMicrostructureSolid SolutionNatural SciencesX-ray DiffractionApplied PhysicsCondensed Matter PhysicsSm 1+X
Crystal structures in solid solution of Sm 1+x Ba 2−x Cu 3 O 7−y (X = 0 - 0.4) have been investigated by Rietveld analysis of X-ray powder diffraction data. The structure changes from orthorhombic to tetragonal at x=0.2. With the increase of x, T c decreases monotonically from 90 K and the compound becomes semiconducting at x=0.4.