Investigation of Fe incorporation in LnCr2Al20 (Ln = La, Gd, Yb) with 57Fe M枚ssbauer and Single Crystal X-ray Diffraction

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• 作者：LaRico J. Treadwell ; Jacob D. McAlpin ; Devin C. Schmitt ; Michael J. Kangas ; Moulay T. Sougrati ; Neel Haldolaarachchige ; David P. Young ; Jean-Claude Jumas ; Julia Y. Chan
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：May 6, 2013
• 年：2013
• 卷：52
• 期：9
• 页码：5055-5062
• 全文大小：459K
• 年卷期：v.52,no.9(May 6, 2013)
• ISSN：1520-510X

文摘

Crystal growth, structure determination, and magnetic properties of LnCr₂Al_20-xFe_x (Ln = La, Gd, Yb) adopting the CeCr₂Al₂₀ structure type with space group Fd3̅m, a 14.5 脜, are reported. Single crystal X-ray diffraction and M枚ssbauer spectroscopy are employed to fully characterize the crystal structure of LnCr₂Al_20-xFe_x (Ln = La, Gd, Yb). LnCr₂Al_20-xFe_x (Ln = La, Gd, Yb) are the first pseudoternaries adopting the CeCr₂Al₂₀ structure type with a transition metal occupying the main group site. The Yb analogues are Pauli paramagnets with the Yb ion adopting an electronic configuration close to Yb²⁺, while the Gd analogues show paramagnetic behavior with no magnetic order down to 3 K.