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Crystal structures and magnetic properties of lanthanide containing borates LnM(BO3)(2) (Ln=Y, Ho-Lu, M=Sc, Cr)

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Title: Crystal structures and magnetic properties of lanthanide containing borates LnM(BO3)(2) (Ln=Y, Ho-Lu, M=Sc, Cr)
Authors: Doi, Yoshihiro Browse this author →KAKEN DB
Satou, Tatsuya Browse this author
Hinatsu, Yukio Browse this author →KAKEN DB
Keywords: Borate
Dolomite-type structure
Calcite-type structure
Magnetic properties
Antiferromagnetism
Specific heat
Issue Date: Oct-2013
Publisher: Academic press inc elsevier science
Journal Title: Journal of solid state chemistry
Volume: 206
Start Page: 151
End Page: 157
Publisher DOI: 10.1016/j.jssc.2013.08.015
Abstract: The synthesis, crystal structures and magnetic properties of LnM(BO3)(2) (Ln=Y, Ho Lu; M=Sc, Cr) were investigated. The LnCr(BO3)(2) compounds crystallize in the dolomite-type structure with space group R (3) over bar, in which the Ln and Cr ions occupy two octahedral sites. From the result of structural analysis, it was found that there is an anti-site disorder between these two sites and its chemical formula is more exactly Ln(1-r)Cr(r)[Cr(1-r)Ln(r)](BO3)(2). On the other hand, the LnSc(BO3)(2) adopt the calcite-type structure with space group R (3) over barc. The Ln and Sc ions randomly occupy an octahedral site and the chemical formula is represented as (Ln(0.5)Sc(0.5))BO3. From the magnetic susceptibility and specific heat measurements, we found that all the LnCr(BO3)(2) show an antiferromagnetic transition at 6.1-8.1 K. This transition is mainly due to the ordering of Cr3+ magnetic moments. Among the compounds with magnetic Ln(3+) ions, only YbCr(BO3)(2) shows an antiferromagnetic ordering of Ln(3+) ion at 2.1 K. (C) 2013 Elsevier Inc. All rights reserved.
Type: article (author version)
URI: http://hdl.handle.net/2115/53747
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 土井 貴弘

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