Relief of frustration through spin disorder in multiferroic Ho1−xYxMnO3

The magnetic phase diagram of single crystalline Ho1−xYxMnO3 below TN is determined by measuring the magnetic susceptibility (χ), specific heat (Cp), dielectric constant (ε), and thermal conductivity (κ). Y doping enhances the P6̱3cm̱ magnetic phase below TSR and therefore increases TSR; only the P6̱3cm̱ phase exists below TN for x⩾0.9 samples. Y doping also reduces the P63cm phase below T2. The anomaly around TSR appears in the dielectric …