Toward intrinsic functionalities of bilayered ruthenate Sr3Ru2O7
Journal article, 2009

Polymorphic materials are known for being prone to intergrowth. Remarkable examples are strontium ruthenates whose properties are dramatically tuned by impurities and disorder. In particular, Sr3Ru2O7 shows a strong variation in transport and magnetic properties depending on synthesis process. It is therefore crucial to correlate atomic structure and properties to identify the functionalities of individual nanostructural constituents. We report a comparative study between Sr3Ru2O7 crystals grown as single phase and in Sr3Ru2O7-Sr2RuO4 eutectics. Our analysis by transmission electron microscopy reveals that Sr3Ru2O7 domains of the eutectic have a significantly lower level of impurities compared to Sr3Ru2O7 single-phase crystals, where intergrowths of Sr4Ru3O10 and SrRuO3 phase are seen. This is confirmed by magnetic measurements. These results identify the eutectic solidification as a fruitful way to grow highly pure crystals of polymorphic materials which, in combination with recent technological developments allowing the extraction of embedded features of crystals, opens a pathway for understanding of their physical properties and applications.

transmission electron microscopy

polymorphism

disorder

superconducting materials

sr2ruo4

compounds

impurities

strontium

eutectic structure

o system

growth

superconductivity

quantum criticality

single-crystals

solidification

Author

Regina Ciancio

Johan Börjesson

Chalmers, Applied Physics, Microscopy and Microanalysis

Henrik Pettersson

Chalmers, Applied Physics, Microscopy and Microanalysis

R. Fittipaldi

D. Zola

A. Vecchione

M. Polichetti

S. Kittaka

Y. Maeno

S. Pace

Eva Olsson

Chalmers, Applied Physics, Microscopy and Microanalysis

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 80 5 054110 (artno)-

Subject Categories

Other Engineering and Technologies not elsewhere specified

DOI

10.1103/PhysRevB.80.054110

More information

Created

10/7/2017