Structure-related transport properties of A-site ordered perovskite Sr3ErMn4-xGaxO10.5-d
arXiv:1103.3342 · doi:10.1016/j.jmmm.2009.09.057
Abstract
We report x-ray diffraction, resistivity, thermopower, and magnetization of Sr3ErMn4-xGaxO10.5-d, in which A-site ordered tetragonal phase appears above x=1, and reveal that the system exhibits typical properties seen in the antiferromagnetic insulator with Mn3+. We succeed in preparing both A-site ordered and disordered phases for x=1 in different preparation conditions, and observe a significant decrease of the resistivity in the disordered phase. We discuss possible origins of the decrease focusing on the dimensionality and the disordered effect.
arXiv comment4 pages, 6 figures
References in corpus (5)
- Competing Orders and Disorder-induced Insulator to Metal Transition in Manganites
- Structures and Electromagnetic Properties of New Metal-Ordered Manganites; RBaMn_{2}O_{6} (R = Y and Rare Earth Elements)
- Room-temperature ferromagnetism in Sr_(1-x)Y_xCoO_(3-delta) (0.2 < x < 0.25)
- Soft Hubbard gaps in disordered itinerant models with short-range interaction
- Structure-Property Relationship in the Ordered-Perovskite- Related Oxide Sr3.12Er0.88Co4O10.5