High pressure structural studies on SrRuO[subscript 3]

Journal Article · Thu Oct 02 04:00:00 EDT 2008 · J. Phys. Chem. Solids

DOI:https://doi.org/10.1016/j.jpcs.2008.04.013· OSTI ID:1006854

Jacobsen, M K; Kumar, R S; Cao, G; Neumeier, J J; Cornelius, A L ^[1]

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1. UNLV

We have performed room temperature high pressure structural studies on the ferromagnetic perovskite SrRuO{sub 3} to 34 GPa. We have also used three different pressure media (silicone fluid, 4:1 methanol:ethanol and argon) to test for possible effects of pressure media on compression data. The orthorhombic perovskite structure is stable to the highest pressure, and the data can be fit with a bulk modulus of B{sub 0} = 192(3) GPa with a pressure derivative of B{prime}{sub 0} = 5.0(3) for all of the pressure media. We have also examined the high pressure behavior of the RuO{sub 6} octahedra using a model that assumes the octahedra are not distorted. Various tilt angles around the ideal cubic perovskite axes are found and can be used to estimate the Ru-O-Ru bond angle that is known to be directly related to the ferromagnetic Curie temperature. For all pressure media, there appears to be a minimum in the Ru-O-Ru bond angle around 15 GPa. Implications for the observed high pressure magnetic behavior of SrRuO{sub 3} will be discussed.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: USDOE
• OSTI ID: 1006854
• Journal Information: J. Phys. Chem. Solids, Journal Name: J. Phys. Chem. Solids Journal Issue: (9) ; 09, 2008 Vol. 69; ISSN 0022-3697; ISSN JPCSAW
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
BOND ANGLE
COMPRESSION
CRYSTAL STRUCTURE
CURIE POINT
PEROVSKITE
PRESSURE RANGE GIGA PA
RUTHENIUM OXIDES
STRONTIUM OXIDES