Substituting small amounts of sulfur for oxygen in PbTiO3 slightly increases its tetragonality and strengthens its negative thermal expansion over a wider temperature range.
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Mixed anion control of enhanced negative thermal expansion in the oxysulfide of PbTiO3
Substituting small amounts of sulfur for oxygen in PbTiO3 slightly increases its tetragonality and strengthens its negative thermal expansion over a wider temperature range.