Dielectric properties of Mn doped SrTiO3
作者： M Savinov , V A Trepakov , P P Syrnikov , V Železný , J Pokorný
DOI: 10.1088/0953-8984/20/9/095221
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摘要: The dielectric permittivity (100 Hz–1 MHz) and IR reflectivity of SrTiO3:Mn(0.1 at.%) crystals SrTiO3:Mn(0.1–3 ceramics prepared maintaining the ratio (Sr+Mn)/ Ti = 1 or (Ti+Mn)/Sr (A- B-type ceramics, respectively) were studied. Surprisingly, magnitude e'(T) dependence for with 0.1 at.% Mn appeared to be nearly same; magnitudes rise on cooling reach ~3000 at T 7 K. At same time, spectra reveal that TO (transverse optical) phonons yield a low frequency ~4000 5 K, evidencing crystal inhomogeneity. Both crystals, like faint temperature relaxations Arrhenius activation energies ~37–40 meV ~120–130 (P- T-relaxations). These emerge in losses only tentatively attributed reorientation defects associated MnTi2+–O−-type polaronic centres Oh1–D4h18 phase transition related effects, respectively. In reduced P-relaxation strongly enhances, becoming distinctly seen real part permittivity. More heavily doped A- pronounced Arrhenius-type relaxation energy ~59–68 depending concentration.
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sci-hub.se 参考文章(22)
Marie‐Claude Bernard, Anne Hugot‐Le Goff, Bich Vu Thi, Susanna Cordoba Cordoba de Torresi, None, Electrochromic Reactions in Manganese Oxides I . Raman Analysis Journal of The Electrochemical Society. ,vol. 140, pp. 3065- 3070 ,(1993) , 10.1149/1.2220986
A. Tkach, P. M. Vilarinho, A. L. Kholkin, Polar behavior in Mn-doped SrTiO3 ceramics Applied Physics Letters. ,vol. 86, pp. 172902- ,(2005) , 10.1063/1.1920414
C.B. Azzoni, M.C. Mozzati, P. Galinetto, A. Paleari, V. Massarotti, M. Bini, D. Capsoni, Magnetic investigation of Mn ions in La,Mn:SrTiO3 Solid State Communications. ,vol. 116, pp. 303- 308 ,(2000) , 10.1016/S0038-1098(00)00339-2
Qi Zhang, Effects of Mn doping on the ferroelectric properties of PZT thin films Journal of Physics D. ,vol. 37, pp. 98- 101 ,(2004) , 10.1088/0022-3727/37/1/016
C.B. Azzoni, M.C. Mozzati, A. Paleari, V. Massarotti, M. Bini, D. Capsoni, Magnetic evidence of different environments of manganese ions in Mn-substituted strontium titanate Solid State Communications. ,vol. 114, pp. 617- 622 ,(2000) , 10.1016/S0038-1098(00)00121-6
A G Badalyan, C B Azzoni, P Galinetto, M C Mozzati, V A Trepakov, M Savinov, A Deyneka, L Jastrabik, J Rosa, Impurity centers and host microstructure in weakly doped SrTiO3:Mn crystals: new findings Journal of Physics: Conference Series. ,vol. 93, pp. 012012- ,(2007) , 10.1088/1742-6596/93/1/012012
G. A. Samara, A. A. Giardini, Pressure Dependence of the Dielectric Constant of Strontium Titanate Physical Review. ,vol. 140, pp. A954- A957 ,(1965) , 10.1103/PHYSREV.140.A954
W. G. Nilsen, J. G. Skinner, Raman Spectrum of Strontium Titanate Journal of Chemical Physics. ,vol. 48, pp. 2240- 2248 ,(1968) , 10.1063/1.1669418
A. Tkach, P. M. Vilarinho, A. L. Kholkin, A. Pashkin, S. Veljko, J. Petzelt, Broad-band dielectric spectroscopy analysis of relaxational dynamics in Mn-doped SrTiO 3 ceramics Physical Review B. ,vol. 73, pp. 104113- ,(2006) , 10.1103/PHYSREVB.73.104113
V. V. Laguta, I. V. Kondakova, I. P. Bykov, M. D. Glinchuk, A. Tkach, P. M. Vilarinho, L. Jastrabik, Electron spin resonance investigation of Mn 2 + ions and their dynamics in Mn-doped Sr Ti O 3 Physical Review B. ,vol. 76, pp. 054104- ,(2007) , 10.1103/PHYSREVB.76.054104