Stabilization of the n = 3 Ruddlesden-Popper Phases: Sr4Mn3-xFexO10-δ and Sr4-yCayMn3O10- δ

Published

November 1, 2001

Author(s)

R Chen, Martha Greenblatt, Leonid A. Bendersky

Abstract

Sr₄Mn₃O₁₀, which crystallizes in space group Cmca, is not a Ruddlesden-Popper (RP) phase. The partial substitution of either Mn by Fe or Sr by Ca leads to a stable n = 3 RP phase with tetragonal symmetry (I4/mmm). The minimum amount of Fe or Ca needed to obtain a stable RP phase are x = 0.40 for Sr₄Mn_3-xFe_xO_{10- δ}. High resolution transmission electron microscopy and selected area electron diffraction electron microscopy indicate that about 50% of the grains have well-ordered n = 3 structure for both series of RP phases, while the rest of the grains show significant intergrowth between the n = 2 and n = 3 structures. Sr₄Mn_2.6Fe_0.4O_{10- δ} and Sr_1.15Ca_2.85Mn₃O_{10 - δ} are semiconductors and exhibit spin-glass like transitions at low temperature.

Citation

Chemistry of Materials

Volume

13

Issue

No. 11

Pub Type

Journals

Keywords

Ruddlesden-Popper phase, Sr-Ca-Mn-O, Sv-Mn-Fe-O, TEM

Citation

Chen, R. , Greenblatt, M. and Bendersky, L. (2001), Stabilization of the n = 3 Ruddlesden-Popper Phases: Sr₄Mn_3-xFe_xO_10-δ and Sr_4-yCa_yMn₃O_{10- δ}, Chemistry of Materials (Accessed April 25, 2024)