Abstract
The high pressure structural phase diagram of EuTiO3 is revisited by means of single crystal x-ray diffraction at pressures below 30GPa. We report a transition at about 3GPa with a surprisingly small lattice distortion. At 23GPa we have detected a yet unknown transition into a new orthorhombic phase (space group Ibam). Combining our observations on structures obtained on single crystals and polycrystalline samples with complementary methods, such as electrical resistivity and nuclear forward scattering of synchrotron radiation measured on polycrystalline samples, we address issues relevant to chemistry and disorder.
| Original language | English |
|---|---|
| Journal | Physical Review B |
| Volume | 98 |
| Issue number | 5 |
| DOIs | |
| State | Published - Aug 9 2018 |
Funding
The Helmholtz Association of German research centers is acknowledged for funding (VH NG-407 “Lattice dynamics in emerging functional materials”). The European Synchrotron Radiation Facility and the Deutsches Elektronen-Synchrotron are acknowledged for provision of synchrotron radiation beamtime at ID18, ID27, and P02, respectively. We thank Dr. K. Z. Rushchanskii, Dr. M. Ležaić, Dr. M. Manley, Dr. J. Budai, Dr. A. I.Chumakov, and Dr. R. Rüffer for helpful discussions during preparation of the present manuscript. Dr. V. Svitlyk is acknowledged for help during data acquisition at ID27. Mr. J.-P. Celse is acknowledged for technical assistance during the beamtime at ID18. D.B. acknowledges support from the Industrial Partnership Program (IPP-I28) of Foundation for Fundamental Research on Matter (FOM) (The Netherlands) and BASF New Business. R. P. H.: This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy.