Magnetoelectric effect in antiferromagnetic multiferroic Pb(Fe1/2Nb1/2)O3 and its solid solutions with PbTiO3
| Autor: | I. P. Raevski, V. V. Eremkin, V. G. Smotrakov, S. I. Raevskaya, V. V. Laguta, Vladimir A. Stephanovich, V. V. Titov |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Phase transition Spintronics Condensed matter physics Magnetism Magnetoelectric effect 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity chemistry.chemical_compound chemistry 0103 physical sciences Antiferromagnetism Multiferroics 010306 general physics 0210 nano-technology AFm phase |
| Zdroj: | Physical Review B. 95 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | Antiferromagnets (AFMs) are presently considered as promising materials for applications in spintronics and random access memories due to the robustness of information stored in the AFM state against perturbing magnetic fields. In this respect, AFM multiferroics may be attractive alternatives for conventional AFMs as the coupling of magnetism with ferroelectricity (magnetoelectric effect) offers an elegant possibility of electric-field control and switching of AFM domains. Here we report the results of comprehensive experimental and theoretical investigations of the quadratic magnetoelectric (ME) effect in single crystals and highly resistive ceramics of $\mathrm{Pb}(\mathrm{F}{\mathrm{e}}_{1/2}\mathrm{N}{\mathrm{b}}_{1/2}){\mathrm{O}}_{3}$ (PFN) and $(1\ensuremath{-}x)\mathrm{Pb}(\mathrm{F}{\mathrm{e}}_{1/2}\mathrm{N}{\mathrm{b}}_{1/2}){\mathrm{O}}_{3}\ensuremath{-}x\mathrm{PbTi}{\mathrm{O}}_{3}(\mathrm{PFN}\text{\ensuremath{-}}x\mathrm{PT})$. We are interested primarily in the temperature range of the multiferroic phase, $Tl150\phantom{\rule{0.16em}{0ex}}\mathrm{K}$, where the ME coupling coefficient is extremely large (as compared to the well-known multiferroic $\mathrm{BiFe}{\mathrm{O}}_{3}$) and shows sign reversal at the paramagnetic-to-antiferromagnetic phase transition. Moreover, we observe strong ME response nonlinearity in the AFM phase in the magnetic fields of only a few kOe. To describe the temperature and magnetic field dependencies of the above unusual features of the ME effect in PFN and PFN-$x\mathrm{PT}$, we use a simple phenomenological Landau approach which explains experimental data surprisingly well. Our ME measurements demonstrate that the electric field of only 20--25 kV/cm is able to switch the AFM domains and align them with ferroelectric ones even in PFN ceramic samples. |
| Databáze: | OpenAIRE |
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