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Title: Interatomic versus intraatomic Ru interactions in perovskites

Abstract

The competition between interatomic Ru-O-Ru interactions responsible for itinerant-electron ferromagnetism in SrRuO{sub 3} and intraatomic spin-orbit coupling that suppresses some Ru-O-Ru magnetic interactions in CaRuO{sub 3} so as to prevent long-range magnetic order has been further tested by investigating the double perovskites La{sub 2}RuZnO{sub 6}, La{sub 2}RuCoO{sub 6}, La{sub 2}TiCoO{sub 6}, and the solid solution Ca{sub 2-2x}La{sub 2x}Ru{sub 2-x}Co{sub x}O{sub 6} (0.0{<=}x{<=}1.0). The paramagnetic state of the low-spin, localized Ru{sup 4+}:t{sup 4}e{sup 0} configuration of LaRuZnO{sub 6} undergoes a progressive transition on lowering the temperature to a non-magnetic state (J=0) as a result of spin-orbit coupling, {lambda}L.S. Comparison of the susceptibilities of La{sub 2}RuCoO{sub 6} and La{sub 2}TiCoO{sub 6} shows a similar behavior with long-range antiferromagnetic cobalt ordering via non-magnetic RuO{sub 6/2} and TiO{sub 6/2} bridges. Comparison is also made of the effect of substituting Ga for Ru in CaRuO{sub 3} with the effect of other dopants M in CaRu{sub 1-x}M{sub x}O{sub 3}. The evolution of transport properties in Ca{sub 2-2x}La{sub 2x}Ru{sub 2-x}Co{sub x}O{sub 6} is also presented. - Graphical abstract: The competition between interatomic Ru-O-Ru interactions responsible for itinerant-electron ferromagnetism in SrRuO{sub 3} and intraatomic spin-orbit coupling that suppresses some Ru-O-Ru magnetic interactions in CaRuO{sub 3} so as tomore » prevent long-range magnetic order has been further tested by investigating the double perovskites La{sub 2}RuZnO{sub 6}, La{sub 2}RuCoO{sub 6}, La{sub 2}TiCoO{sub 6}, and the solid solution Ca{sub 2-2x}La{sub 2x}Ru{sub 2-x}Co{sub x}O{sub 6} (0.0{<=}x{<=}1.0)« less

Authors:
;  [1];  [2]
  1. Texas Materials Institute, University of Texas at Austin, ETC 9.102, Austin, TX 78712 (United States)
  2. Texas Materials Institute, University of Texas at Austin, ETC 9.102, Austin, TX 78712 (United States), E-mail: jgoodenough@mail.utexas.edu
Publication Date:
OSTI Identifier:
21212093
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 181; Journal Issue: 11; Other Information: DOI: 10.1016/j.jssc.2008.07.023; PII: S0022-4596(08)00391-5; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANTIFERROMAGNETISM; CALCIUM COMPOUNDS; COBALT OXIDES; DOPED MATERIALS; FERROMAGNETISM; INTERACTIONS; L-S COUPLING; MAGNETIC PROPERTIES; PARAMAGNETISM; PEROVSKITES; RUTHENIUM; RUTHENIUM IONS; RUTHENIUM OXIDES; SOLID SOLUTIONS; STRONTIUM COMPOUNDS

Citation Formats

Kim, Sangwon, Dass, Ronald I., and Goodenough, John B. Interatomic versus intraatomic Ru interactions in perovskites. United States: N. p., 2008. Web. doi:10.1016/j.jssc.2008.07.023.
Kim, Sangwon, Dass, Ronald I., & Goodenough, John B. Interatomic versus intraatomic Ru interactions in perovskites. United States. doi:10.1016/j.jssc.2008.07.023.
Kim, Sangwon, Dass, Ronald I., and Goodenough, John B. Sat . "Interatomic versus intraatomic Ru interactions in perovskites". United States. doi:10.1016/j.jssc.2008.07.023.
@article{osti_21212093,
title = {Interatomic versus intraatomic Ru interactions in perovskites},
author = {Kim, Sangwon and Dass, Ronald I. and Goodenough, John B.},
abstractNote = {The competition between interatomic Ru-O-Ru interactions responsible for itinerant-electron ferromagnetism in SrRuO{sub 3} and intraatomic spin-orbit coupling that suppresses some Ru-O-Ru magnetic interactions in CaRuO{sub 3} so as to prevent long-range magnetic order has been further tested by investigating the double perovskites La{sub 2}RuZnO{sub 6}, La{sub 2}RuCoO{sub 6}, La{sub 2}TiCoO{sub 6}, and the solid solution Ca{sub 2-2x}La{sub 2x}Ru{sub 2-x}Co{sub x}O{sub 6} (0.0{<=}x{<=}1.0). The paramagnetic state of the low-spin, localized Ru{sup 4+}:t{sup 4}e{sup 0} configuration of LaRuZnO{sub 6} undergoes a progressive transition on lowering the temperature to a non-magnetic state (J=0) as a result of spin-orbit coupling, {lambda}L.S. Comparison of the susceptibilities of La{sub 2}RuCoO{sub 6} and La{sub 2}TiCoO{sub 6} shows a similar behavior with long-range antiferromagnetic cobalt ordering via non-magnetic RuO{sub 6/2} and TiO{sub 6/2} bridges. Comparison is also made of the effect of substituting Ga for Ru in CaRuO{sub 3} with the effect of other dopants M in CaRu{sub 1-x}M{sub x}O{sub 3}. The evolution of transport properties in Ca{sub 2-2x}La{sub 2x}Ru{sub 2-x}Co{sub x}O{sub 6} is also presented. - Graphical abstract: The competition between interatomic Ru-O-Ru interactions responsible for itinerant-electron ferromagnetism in SrRuO{sub 3} and intraatomic spin-orbit coupling that suppresses some Ru-O-Ru magnetic interactions in CaRuO{sub 3} so as to prevent long-range magnetic order has been further tested by investigating the double perovskites La{sub 2}RuZnO{sub 6}, La{sub 2}RuCoO{sub 6}, La{sub 2}TiCoO{sub 6}, and the solid solution Ca{sub 2-2x}La{sub 2x}Ru{sub 2-x}Co{sub x}O{sub 6} (0.0{<=}x{<=}1.0)},
doi = {10.1016/j.jssc.2008.07.023},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 11,
volume = 181,
place = {United States},
year = {2008},
month = {11}
}