Eugene A. Eliseev, Maya D. Glinchuk, Victoria V. Khist, Chan-Woo Lee, Chaitanya S. Deo, Rakesh K. Behera, Anna N. Morozovska
Using Landau-Ginzburg-Devonshire theory we study the complex interplay between structural antiferrodistortive order parameter (oxygen rotations), polarization and magnetization in EuxSr1-xTiO3 nanotubes and nanowires. We calculated EuxSr1-xTiO3 bulk and nanosystem phase diagrams, which include the antiferrodistortive, ferroelectric, ferromagnetic and antiferromagnetic phases. Our calculation shows the presence of "triple" antiferrodistortive-ferroelectric-ferromagnetic phases for EuxSr1-xTiO3 nanowires and nanotubes. presents interest for fundamental study and can be important for their potential applications. Since the triple phase exists at low temperatures (<10 K) with high polarization and magnetization values (50 muC/cm2 and 0.5 MA/m2), it is important to investigate the coupling between structural distortions, polarization and magnetization in EuxSr1-xTiO3 nanosystems for possible multiferroic applications.
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http://arxiv.org/abs/1209.5582
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