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您的检索式：作者名="Dmitry V.Karpinsky"
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| 1 | Thermodynamic potential and phase diagram for multiferroic bismuth ferrite(BiFeO_(3))显示文摘We construct a Landau-Ginzburg thermodynamic potential,and the corresponding phase diagram for pristine and slightly doped bismuth ferrite,a ferroelectric antiferromagnet at room temperature.The potential is developed based on new X-ray and neutron diffraction experiments complementing available data.We demonstrate that a strong biquadratic antiferrodistortive-type coupling is the key to a quantitative description of Bi_(1−x)La_(x)FeO_(3) multiferroic phase diagram including the temperature stability of the antiferromagnetic,ferroelectric,and antiferrodistortive phases,as well as for the prediction of novel intermediate structural phases.Furthermore,we show that“rotomagnetic”antiferrodistortive-antiferromagnetic coupling is very important to describe the ferroelectric polarization and antiferrodistortive tilt behavior in the R3c phase of BiFeO_(3).The Landau-Ginzburg thermodynamic potential is able to describe the sequence of serial and trigger-type phase transitions,the temperature-dependent behavior of the order parameters,and the corresponding susceptibilities to external stimuli.It can also be employed to predict the corresponding ferroelectric and antiferrodistortive properties of Bi_(1−x)La_(x)FeO_(3) thin films and nanoparticles by incorporating the gradient and surface energy terms that are strongly dependent on the shape,size,and preparation method. | Dmitry V.Karpinsky Eugene A.Eliseev Fei Xue Maxim V.Silibin Alexandra Franz Maya D.Glinchuk Igor O.Troyanchuk Sergey A.Gavrilov Venkatraman Gopalan Long-Qing Chen Anna N.Morozovska | 2017 | npj Computational Materials2017，，1： | 1 |
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