Enhancement of ferroelectricity in Cr-doped Ho2Ti2O7

Dong, X. W.; Dong, S.; Wang, K. F.; Wan, J. G.; Liu, J.-M.
June 2010
Applied Physics Letters;6/14/2010, Vol. 96 Issue 24, p242904
Academic Journal
A series of polycrystalline pyrochlore rare-earth titanate Ho2-xCrxTi2O7 are synthesized in order to enhance the ferroelectricity of pyrochlore Ho2Ti2O7. A giant enhancement of polarization P from 0.54 μC/m2 at x=0 up to ∼660 μC/m2 at x=0.4 is obtained, accompanied with an increment of ferroelectric transition point Tc from Tc∼60 K up to Tc∼140 K. A magnetic anomaly at Tc∼140 K together with the polarization response to magnetic field is identified, implying the multiferroic effect in Ho2-xCrxTi2O7.


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