title: Trends in orthorhombic crystal field parameters for trivalent rare-earth ions in high-Tc superconductors REBa₂Cu₃O₇-δ - correct interpretation based on standardization.
abstract: Trends in orthorhombic crystal field parameters (CFPs) reported for RE(3+) ions in high-T(c) superconductors REBa(2)Cu(3)O(7-)(δ) are considered. The cases of trends based on the CFP sets belonging to different regions of CF parameter space are identified and clarified. The crucial feature of such correlated alternative CFP sets is their intrinsic incompatibility. This makes meaningless direct comparisons of such CFP sets and thus presentations of CFP trends involving a mixture of alternative CFP sets. The aim of this paper is to ascertain that correct interpretation of trends in orthorhombic CFPs must be based on standardization. Examples of graphs inappropriately representing trends in orthorhombic CFPs reported for REBa(2)Cu(3)O(7-)(δ) compounds are considered and the corrected graphs based on the standardized CFP sets are provided.
authors.affiliation: Institute of Physics, West Pomeranian University of Technology, Szczecin, Al. Piastów 48, 70-311 Szczecin, Poland. crudowicz@zut.edu.pl
authors.forename: Czesław
authors.initials: C
authors.lastname: Rudowicz
authors.forename: Monika
authors.initials: M
authors.lastname: Lewandowska
mesh_terms: D001464:Barium / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D003460:Crystallization; D004553:Electric Conductivity; D004581:Electronics / Q000295:instrumentation* / Q000592:standards; D006358:Hot Temperature; D007477:Ions / Q000737:chemistry*; D008674:Metals, Rare Earth / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry
chemical_list: D007477:Ions; D008674:Metals, Rare Earth; D001464:Barium; D003300:Copper; D010100:Oxygen