Elastic Constants of Strontium Titanate

Bell, R. O.; Rupprecht, G.

doi:10.1103/physrev.129.90

Cited by 388 publications

(135 citation statements)

References 10 publications

Supporting

Mentioning

117

Contrasting

Unclassified

Order By: Relevance

“…The c/a ratio depends sensitively on the polarization of the film. The experimental c/a ratios from 5 and 10 unit cell films are significantly greater than that predicted from the elastic constants of SrTiO 3 [33] and agree well with calculations on bulk strained SrTiO 3 , which show it is polarized [8,10]. Of the low-energy structures in DFT, the x = 3/4 structure agrees best with the experimental c/a.…”

supporting

confidence: 77%

Structure ofSrTiO3Films on Si

Hellberg

Andersen²,

et al. 2012

Phys. Rev. Lett.

View full text Add to dashboard Cite

supporting

confidence: 77%

Structure ofSrTiO3Films on Si

Hellberg

Andersen²,

et al. 2012

Phys. Rev. Lett.

View full text Add to dashboard Cite

“…This is clearly not observed in C ′ . Interestingly, the same discrepancy is found in STO [30], and remains unexplained.…”

Section: Elastic Modulimentioning

confidence: 58%

Structural and magnetic phase transitions inEuTi1−xNbxO3

Morris

Köehler

et al. 2015

Phys. Rev. B

View full text Add to dashboard Cite

We have investigated the structural and magnetic phase transitions in EuTi1−xNbxO3 (0 ≤ x ≤ 0.3) with synchrotron powder X-ray diffraction (XRD), resonant ultrasound spectroscopy (RUS), and magnetization measurements. Upon Nb-doping, the P m3m ↔ I4/mcm structural transition shifts to higher temperatures and the room temperature lattice parameter increases while the magnitude of the octahedral tilting decreases. In addition, Nb substitution for Ti destabilizes the antiferromagnetic ground state of the parent compound and long range ferromagnetic order is observed in the samples with x ≥ 0.1. The structural transition in pure and doped compounds is marked by a dramatic step-like softening of the elastic moduli near TS, which resembles that of SrTiO3 and can be adequately modeled using the Landau free energy model employing the same coupling between strain and octahedral tilting order parameter as previously used to model SrTiO3.

show abstract

“…The examples reviewed here are the soft-mode-driven SPTs in the perovskite system La 2 Cu0 4 , which includes several high-temperature superconductors, and in SrTi0 3 . SrTi0 3 is a perovskite that undergoes a SPT from cubic (the high-temperature or 'symmetric' phase) to tetragonal (the low-temperature or 'unsymmetric' phase) crystal symmetry at 105 K. This material is particularly interesting because its SPT is a canonical example of a soft-mode [38] phase transition and has been well studied both theoretically [39] and experimentally using conventional ultrasonic techniques [40,41,42]. Furthermore, the perovskite structure and underlying titanium-oxygen octahedra in SrTi0 3 are very similar to the structure of the hightemperature superconductors La 2 CuO 4 and La 2 _ x Sr x Cu0 4 to be discussed below.…”

Section: Typical Resultsmentioning

confidence: 99%

Resonant ultrasound spectroscopic techniques for measurement of the elastic moduli of solids

Migliori

Sarrao

Visscher

et al. 1993

Physica B: Condensed Matter

563

361

View full text Add to dashboard Cite

The mechanical resonant response of a solid depends on its shape, density, elastic moduli and dissipation. We describe here instrumentation and computational methods for acquiring and analyzing the resonant ultrasound spectrum of very small (0.001 cm 3 ) samples as a function of temperature, and provide examples to demonstrate the power of the technique. The information acquired is in some cases comparable to that obtained from other more conventional ultrasonic measurement techniques, but one unique feature of resonant ultrasound spectroscopy (RUS) is that all moduli are determined simultaneously to very high accuracy. Thus in circumstances where high relative or absolute accuracy is required for very small crystalline or other anisotropic samples RUS can provide unique information. RUS is also sensitive to the fundamental symmetry of the object under test so that certain symmetry breaking effects are uniquely observable, and because transducers require neither couplant nor a flat surface, broken fragments of a material can be quickly screened for phase transitions and other temperature-dependent responses.

show abstract

Elastic Constants of Strontium Titanate

Cited by 388 publications

References 10 publications

Structure ofSrTiO3Films on Si

Structure ofSrTiO3Films on Si

Structural and magnetic phase transitions inEuTi1−xNbxO3

Resonant ultrasound spectroscopic techniques for measurement of the elastic moduli of solids

Contact Info

Product

Resources

About