Structural transformations in complex Structural transformations in ...

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Relaxors – frustrated ferrielectrics? Anti‐ferroelectric Pb displacement Off‐centered Pb atoms polar displacement of B‐cation Polar displacement of Pb‐BO 3 + = + = FE AFE 18
Publications (project MI 1127/2 1127/2‐2) 2) B. Maier et al. (2010): A‐site doping induced renormalization phenomena in PbSc 0.5 Nb 0.5 O 3 under high pressure. Phys. Rev. B, 81, 174116/1‐8. B. Maier et al (2010): Octahedral tilting in Pb‐based relaxor ferroelectrics at high pressure. Acta Cryst. B, 66, 280‐291. B. Maier et al, High‐pressure powder neutron diffraction study on lead scandium niobate. J. Phys.: Condens. Matter, 23, 035902/1‐5. A.‐M. Welsch et al. (2011): Transformation processes in relaxor ferroelectric PbSc 0.5 Ta 0.5 O 3 heavily doped with Nb and Sn. Zeitschrift fuer Kristallographie, 226, 126‐137. B. Maier et al. (2011): Effect of La doping on the ferroic order in Pb‐based relaxor ferroelectrics. Phys. Rev. B, 83, 134106/1‐12. N. Waeselmann et al. (2011): Local structural phenomena in pure and Ru‐doped 0.9PbZn 1/3 Nb 2/3 O 3 ‐0.1PbTiO 3 near the morphotropic phase boundary as revealed by Raman spectroscopy, Phys. Rev. B 83, 214104/1‐13. B. Mihailova et al. (2011): The structural state of lead‐based relaxor ferroelectrics under pressure. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 58, 1905 ‐ 1913. (invited contribution) B. Maier, N. Waeselmann et al. (2011): The structural state of relaxor ferroelectrics PbSc 0.5 Ta 0.5 O 3 and PbSc 0.5 Nb 0.5 O 3 at high pressures up to 30 GPa, Phys. Rev. B, 84, 174104/1‐11. N. Waeselmann et al. (2012): Pressure induced structural transformations in pure and Ru‐doped 0.9PbZn 1/3 Nb 2/3 O 3 ‐0.1PbTiO 3 near the morphotropic phase boundary, Phys. Rev B, 85, 014106/1‐10. submitted / in preparation: N. Waeselmann et all. In‐situ high‐temperature high‐pressure Raman spectroscopy on lead‐based relaxor ferroelectrics PbSc1/2Nb1/2O3 and PbSc1/2Ta1/2O3 . M. Wehber, N. Waeselmann et al. High‐pressure Brillouin sctattering of single‐crystal PbSc0.5Ta0.5O3 relaxor ferroelectric. B. Mihailova, N. Waeselmann et al. Chemically‐induced renormalization phenomena in Pb‐based relaxors under high pressure. 19
Page 1 and 2: Fachbereich Geowissenschaften, Univ
Page 3 and 4: Perovskite CaTiO 3 Perovskite struc
Page 5 and 6: Model compounds & A‐site doping P
Page 7 and 8: Experimental setup 150 µm 7
Page 9 and 10: p C2 PST up to 30 GPa ure pressu pC
Page 11 and 12: PbZn 1/3Nb 2/3O 3‐PbTiO 3 -temper
Page 13 and 14: PbB 2+ 1/3B 5+ 2/3O 3 Three possibl
Page 15 and 16: Submitted/in preparation In‐situ
Page 17: doubled perovskite structure Conclu

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