TY - JOUR
T1 - Crystal structure and magnetic properties of Ba2 R 2/3TeO6 (R = Y, La, Pr, Nd, Sm-Lu) double perovskites
AU - Kong, Tai
AU - Cava, Robert J.
N1 - Funding Information:
We would like to thank WW Xie and E Carnicom for useful discussions. This work was supported by the Gordon and Betty Moore EPiQS initiative, grant number GBMF-4412.
Publisher Copyright:
© 2017 IOP Publishing Ltd.
PY - 2017/10
Y1 - 2017/10
N2 - A new series of cubic double perovskites BaTeO6 (R = Y, La, Pr, Nd, Sm-Lu) was synthesized via solid state reaction. The and ions are ordered on alternating octahedral sites, with the rare earth sites 2/3 occupied to balance the charge. The lattice parameters decrease monotonically from for Ba2 TeO6 to for Ba2 TeO6. The lattice parameter for R = Y is close to that of Ho. Analysis of the resulting bond lengths indicates a structural relaxation around the R ion site. Ba2 TeO6, Ba2 TeO6 and Ba2 TeO6 show primarily temperature-independent magnetic susceptibility due to the lack of a local rare earth moment. For Ba2 TeO6 and Ba2 TeO6, the susceptibilities are influenced by Van Vleck-like contributions from excited state multiplets. For the remaining members, the Curie-Weiss law is followed with lowerature deviations that can be associated with various degrees of crystalline electric field splitting. No magnetic ordering was observed down to 1.8 K in any of the compounds.
AB - A new series of cubic double perovskites BaTeO6 (R = Y, La, Pr, Nd, Sm-Lu) was synthesized via solid state reaction. The and ions are ordered on alternating octahedral sites, with the rare earth sites 2/3 occupied to balance the charge. The lattice parameters decrease monotonically from for Ba2 TeO6 to for Ba2 TeO6. The lattice parameter for R = Y is close to that of Ho. Analysis of the resulting bond lengths indicates a structural relaxation around the R ion site. Ba2 TeO6, Ba2 TeO6 and Ba2 TeO6 show primarily temperature-independent magnetic susceptibility due to the lack of a local rare earth moment. For Ba2 TeO6 and Ba2 TeO6, the susceptibilities are influenced by Van Vleck-like contributions from excited state multiplets. For the remaining members, the Curie-Weiss law is followed with lowerature deviations that can be associated with various degrees of crystalline electric field splitting. No magnetic ordering was observed down to 1.8 K in any of the compounds.
KW - Rare earth magnetism
KW - double perovskite
KW - powder x-ray diffraction
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U2 - 10.1088/2053-1591/aa8f10
DO - 10.1088/2053-1591/aa8f10
M3 - Article
AN - SCOPUS:85042879180
SN - 2053-1591
VL - 4
JO - Materials Research Express
JF - Materials Research Express
IS - 10
M1 - 106101
ER -