Crossover from anisotropic to isotropic transport in R(2/3)A(1/3)MnO(3) perovskites determined by crystal symmetry

Authors
Mira, J Fondado, A Hueso, LE Rivas, J Rivadulla, F Quintela, MAL
Citation
J. Mira et al., Crossover from anisotropic to isotropic transport in R(2/3)A(1/3)MnO(3) perovskites determined by crystal symmetry, PHYS REV B, 61(9), 2000, pp. 5857-5859
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
9
Year of publication
2000
Pages
5857 - 5859
Database
ISI
SICI code
1098-0121(20000301)61:9<5857:CFATIT>2.0.ZU;2-0
Abstract
The transport properties of Pr2/3Sr1/3MnO3 and La2/3Sr1/3MnO3 perovskites h ave been studied by means of thermoelectric power measurements in high-qual ity single crystals. It was observed that, whereas Pr2/3Sr1/3MnO3 exhibits anisotropic conducting properties, La2/3Sr1/3MnO3 does not. The former crys tallizes in an orthorhombic structure, with different Mn-O-Mn bond lengths and angles in the ab plane and along the c axis, and the latter in a rhombo hedral structure, with identical Mn-O-Mn bonds and angles; therefore, we re late this qualitative change of the conducting regime to the different crys tal structures.