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DOE OSTI · 1032480

Structure-property coupling in Sr3(Ru1 xMnx)2O7

Hu, Biao·McCandless, Gregory·Garlea, Vasile O·Stadler, S.·Xiong, Yimin·Chan, Julia·Plummer, E. Ward·Jin, R.
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Abstract

Layered ruthenates are prototype materials for the study of structure-property correlations. We report the structural and physical properties of double-layered perovskite Sr3(Ru1 xMnx )2O7 single crystals with 0 < x < 0.7. Single-crystal x-ray diffraction refinements reveal that Mn doping on the Ru site leads to the shrinkage of unit-cell volume and the disappearance of (Ru/Mn)O6 octahedron rotation when x > 0.16, but the crystal structure remains tetragonal. Upon doping, the electrical resistivity reveals a metallic character (d /dT > 0) at high temperatures but insulating behavior (d /dT < 0) below a characteristic temperature TMIT. Interestingly, TMIT is different from TM, at which magnetic susceptibility reaches maximum. While TMIT increases monotonically with increasing x,TM displays a nonmonotonic dependence with x even though the effective spin increases from S 1 (x = 0) to 3/2 (x = 0.7). The phase diagram consists of three distinct magnetic ground states due to local structure change.

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75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYCRYSTAL STRUCTUREELECTRIC CONDUCTIVITYGROUND STATESMAGNETIC SUSCEPTIBILITYMONOCRYSTALSPEROVSKITEPHASE DIAGRAMSPHYSICAL PROPERTIESROTATIONSHRINKAGESPINX-RAY DIFFRACTION

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Hu, Biao, McCandless, Gregory, Garlea, Vasile O, Stadler, S., Xiong, Yimin, Chan, Julia, Plummer, E. Ward, Jin, R.. 2011-01-01. Structure-property coupling in Sr3(Ru1 xMnx)2O7. https://doi.org/10.1103/physrevb.84.174411

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