Schmidt, V. HugoChien, R. R.Tu, Chi-Shun2019-02-082019-02-082010V. Hugo Schmidt, R. R. Chien, and C.-S. Tu, “Field-induced phase transitions in relaxor ferroelectrics,” Ferroelectrics 400, 402-409 (2010). doi: 10.1080/00150193.2010.505879.0015-0193https://scholarworks.montana.edu/handle/1/15222The Landau free energy expansion as a function of three-dimensional polarization for perovskite relaxor ferroelectrics is examined to find effects of large electric fields in causing transitions from one ferroelectric state to another. Our examination of field-induced effects includes a fourth order expansion to obtain the Landau parameters for the observed temperature- and field-induced rhombohedral (R) tetragonal (T) transitions in an (001)-cut 0.70Pb(Mg1/3Mn2/3)O3-0.30PbTiO3 (PMN-30%PT) crystal. These parameters enabled us to predict the appearance of an orthorhombic (O) phase in (110)-cut PMN-30%PT crystals under an applied field. These results show that also for field-induced effects, the Landau expansion shows qualitative agreement with experiment for relaxor ferroelectrics.enThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).http://rightsstatements.org/vocab/InC/1.0/Article