Phase transitions in Ca1 − xSrxTiO3 perovskites: effects of composition and temperature

Abstract

The sequence of phase transitions reported in the Conclusions section of this article contained an error: the labels ``x~0.40'' and ``RT'' were exchanged. The corrected sequence of transitions is given below:The Royal Society of Chemistry apologises for this error and any consequent inconvenience to authors and readers.

Elastic and anelastic anomalies in (Ca,Sr)TiO3 perovskites: Analogue behaviour for silicate perovskites

“…Page 9 of 34 A c c e p t e d M a n u s c r i p t 3 attracted interest as a potential analogue system for the structure, properties and behaviour of (Mg,Fe)SiO 3 and CaSiO 3 perovskites at high pressures and temperatures (Qin et al, 2000(Qin et al, , 2002Carpenter et al, 2001Carpenter et al, , 2007Harrison et al, 2003;Carpenter, 2007a,b). In this context, the most significant issues relate to how the elastic properties vary with pressure, temperature and structure type and, in particular, to whether there are any anomalies in elastic constants or mechanical quality factor, Q, which might lead to a better understanding of the seismic properties of the lower mantle.…”

Emissão luminescente no titanato de cálcio dopado com íons de terras-raras

“…Picos de difração adicionais referentes aos precursores ou fases adicionais não são observados, portanto todas as amostras podem ser consideradas monofásicas. Em adição, não foram observadas alterações na estrutura referentes à presença do íon Sr 2+ , diferentemente do que é observado quando a concentração do dopante estrôncio é alta no sistema Ca 1-x Sr x TiO 3 [44][45][46][47].…”

Thermoelectric and structural correlations in (Sr1−x−yCaxNSomaily1, Koleśnik2, Dąbrowski3 et al. 2017Phys. Rev. B6040View full textAdd to dashboardCite

“…Perhaps this limitation is due in part to the compounded complexity of the diverse structural distortions that have so far been identified for intermediate SCT compositions [13][14][15][16][17][18][19][20][21][22][23][24][25][26]. However, such an extensive range of possible distortion induced symmetries and properties makes our goal to synthesize and investigate Nd 3+ -substituted Sr 1-x-y Ca x Nd y TiO 3 materials even more attractive and compelling.…”

“…While several groups [13][14][15][16][17] report an orthorhombic Pbnm (Pnma) symmetry for only the 0.60 < x ≤ 1.00 Carich members, others [14,15,23,55] extend this orthorhombic distortion range to also include the 0.40 ≤ x ≤ 0.60 members of the series. With even lower Ca concentrations, reports in the literature [13,16,18,55] suggest the structure of the 0.06 ≤ x < 0.40 compositions to have become tetragonal I4/mcm; however, other studies propose the orthorhombic Ibmm symmetry for the compositional range 0.10 ≤ x < 0.35 [15,19,22,23] and the formation of a superstructure with the Pbcm symmetry [14,15,19,20,22] for 0.30 ≤ x <0.40. For compositions with x ≤ 0.06, most papers confirm the structure of these slightly doped materials as cubic m m3 P [14,16].…”

“…6. The unit cell volume of the parent SrTiO 3 [13,[61][62][63] and CaTiO 3 [28,54,64] materials are shown for comparison.…”