Crossover from anisotropic to isotropic transport in perovskites determined by crystal symmetry

Physical Review B - Condensed Matter and Materials Physics

Volumn 61, Issue 9, 2000, Pages 5857-5859

  Mira, J ^a   Fondado, A ^a   Hueso, L ^a   Rivas, J ^a   Rivadulla, F ^a   Quintela, M A López ^a  

^a UNIVERSITY OF SANTIAGO DE COMPOSTELA   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0007829135     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.61.5857     Document Type: Article

References (16)

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13. For each composition (Formula presented) (average ionic radius of the A site) was calculated from the tabulated values of R.D. Shannon, Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. A32, 751 (1976) for atoms in ninefold coordination. The choice of an effective coordination number of 9 instead of 12 for La, Pr, and Sr is justified on the basis of the spontaneous cooperative puckering of the (Formula presented) octahedra as a consequence of the small size of these central cations. The room temperature, ambient-pressure tolerance factor was calculated from the sum of the empirical ionic radii given in the above-mentioned samples. Different values of t for same compounds can be found in the literature, due to the different sources taken for ionic radii data.
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