Synthesis and structure of new pyrochlore-type oxides Ln2ScNbO7 (Ln = Pr, Nd, Eu, Gd, Dy)

被引：23
作者：
Zouari, S. [1 ,2 ]
Ballou, R. [1 ]
Cheikh-Rouhou, A. [2 ]
Strobel, P. [1 ]
机构：
[1] CNRS, Inst Neel, F-38042 Grenoble 9, France
[2] Fac Sci Sfax, Phys Mat Lab, Sfax 3038, Tunisia
来源：
MATERIALS LETTERS | 2008年 / 62卷 / 21-22期
关键词：
ternary oxides; pyrochlores; crystal structure; magnetic materials;
D O I：
10.1016/j.matlet.2008.04.060
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the synthesis and structural study of mixed oxides in the Ln(2)ScNbO(7) series. New phases with Ln = Pr, Eu, Gd and Dy are obtained. All crystallize in the cubic pyrochlore structure type, space group F-d3m, with no Sc-Nb ordering on the B site. The structures are determined by Rietveld refinement. The evolution of cell parameters, interatomic distances and angles as a function of lanthanide cation size is discussed. Magnetic measurements show the absence of ordering down to 2 K, in agreement with the presence of strong geometric frustration in the lanthanide sublattice. The europium phase shows a peculiar magnetic behaviour; its magnetic susceptibility becomes constant below ca 50 K. This feature confirms the behaviour observed previously on Eu2Ti2O7 and is ascribed to crystal field effects. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：3767 / 3769
页数：3
相关论文
共 50 条
  • [41] Synthesis and characterisation of the n=2 Ruddlesden-Popper phases Ln2Sr(Ba)Fe2O7 (Ln = La, Nd, Eu)
    Gurusinghe, Nicola N. M.
    de la Figuera, Juan
    Marco, Jose F.
    Thomas, Michael F.
    Berry, Frank J.
    Greaves, Colin
    MATERIALS RESEARCH BULLETIN, 2013, 48 (09) : 3537 - 3544
  • [42] Identification and optical features of the Pb4Ln2O7 series (Ln = La, Gd, Sm, Nd); genuine 2D-van der Waals oxides
    Colmont, Marie
    Lemoine, Kevin
    Roussel, Pascal
    Kabbour, Houria
    Olchowka, Jacob
    Henry, Natacha
    Hagemann, Hans
    Mentre, Olivier
    CHEMICAL COMMUNICATIONS, 2019, 55 (20) : 2944 - 2947
  • [43] Phase stability in the LnCa2Mn2O7 (Ln = Pr, Nd, Sm and Gd) Ruddlesden-Popper series
    Shah, N
    Green, MA
    Neumann, DA
    JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2002, 63 (09) : 1779 - 1786
  • [44] Synthesis and ionic conductivity of new high Li ion content garnets, LnSr2Ta2Li7O12 (Ln = La, Pr, Nd, Sm, Gd)
    Howard, M. A.
    Clemens, O.
    Parvathy, A. S.
    Anderson, P. A.
    Slater, P. R.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 670 : 78 - 84
  • [45] Synthesis and crystal structure of new quaternary sulfides BaLn2FeS5(Ln = La, Ce, Pr, Nd, Sm)
    Ino, K
    Wakeshima, M
    Hinatsu, Y
    MATERIALS RESEARCH BULLETIN, 2001, 36 (12) : 2207 - 2213
  • [46] The formation and structural parameters of new double molybdates RbLn(MoO4)2 (Ln = Pr, Nd, Sm, Eu)
    Chimitova, Olga D.
    Atuchin, Victor V.
    Bazarov, Bair G.
    Molokeev, Maxim S.
    Bazarova, Zhibzema G.
    METAMATERIALS VIII, 2013, 8771
  • [47] Hydrothermal synthesis, structure, and property characterization of rare earth silicate compounds: NaBa3Ln3Si6O20 (Ln = Y, Nd, Sm, Eu, Gd)
    Sanjeewa, Liurukara D.
    Fulle, Kyle
    McMillen, Colin D.
    Wang, Fenglin
    Liu, Yufei
    He, Jian
    Anker, Jeffrey N.
    Kolis, Joseph W.
    SOLID STATE SCIENCES, 2015, 48 : 256 - 262
  • [48] Eu3+ luminescence in La5Si2BO13 with apatite related structure and magnetic studies in Ln5Si2BO13 (Ln=Gd, Dy)
    Naidu, S. Asiri
    Varadaraju, U. V.
    Raveau, B.
    JOURNAL OF SOLID STATE CHEMISTRY, 2010, 183 (08) : 1847 - 1852
  • [49] Molecular and Polymer Ln2M2 (Ln = Eu, Gd, Tb, Dy; M = Zn, Cd) Complexes with Pentafluorobenzoate Anions: The Role of Temperature and Stacking Effects in the Structure; Magnetic and Luminescent Properties
    Shmelev, Maxim A.
    Kiskin, Mikhail A.
    Voronina, Julia K.
    Babeshkin, Konstantin A.
    Efimov, Nikolay N.
    Varaksina, Evgenia A.
    Korshunov, Vladislav M.
    Taydakov, Ilya, V
    Gogoleva, Natalia, V
    Sidorov, Alexey A.
    Eremenko, Igor L.
    MATERIALS, 2020, 13 (24) : 1 - 22
  • [50] Crystal Growth and Structure Determination of the Mixed-Valent Iron (III/IV) Oxides Sr2-x Ln xFeO4 (Ln = Nd, Sm, Eu)
    Zhao, Qingbiao
    Smith, Mark D.
    zur Loye, Hans-Conrad
    JOURNAL OF CHEMICAL CRYSTALLOGRAPHY, 2011, 41 (05) : 674 - 677
12345