Phase Transitions in the Brominated Ferroelectric Tris‐Sarcosine Calcium Chloride

We demonstrate that the Curie temperature, Tc, of tris-sarcosine calcium chloride can be lowered from 130 K to near 0 K by chemical doping of the anion. In the low temperature limit, quantum fluctuations persist over a range of chemical doping concentrations. Below TC the temperature dependence of the fractional length change, , scales as (red line) where t is the reduced temperature, and λ = -1.5. The behavior of linear coefficient of thermal expansion near TC is shown in the inset. Three additional phase transitions near 43, 50, and 61 K are resolved.