A 121Sb and 151Eu Mossbauer Spectroscopic Investigation of EuCd2X2 (X = P, As, Sb) and YbCd2Sb2

被引：48

作者：

Schellenberg, Inga ^{[1
]}

Pfannenschmidt, Ulrike ^{[1
]}

Eul, Matthias ^{[1
]}

Schwickert, Christian ^{[1
]}

Poettgen, Rainer ^{[1
]}

机构：

[1] Univ Munster, Inst Anorgan & Analyt Chem, D-48149 Munster, Germany

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2011年 / 637卷 / 12期

关键词：

Arsenic; Antimony; Crystal chemistry; Mossbauer spectroscopy; Rare earths; CAAL2SI2-TYPE STRUCTURE; PHYSICAL-PROPERTIES; EUROPIUM COMPOUNDS; STABILITY RANGE; AB2X2; COMPOUNDS; SINGLE-CRYSTAL; SUSCEPTIBILITY; PNICTIDES; YBMN2SB2; YBZN2SB2;

D O I：

10.1002/zaac.201100179

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The pnictides EuCd2X2 (X = P, As, Sb) and YbCd2Sb2 were synthesized from the elements or a EuCd2 precursor in tantalum tubes. The samples were characterized by powder X-ray diffraction. The structure of EuCd2As2 was refined on the basis of single-crystal X-ray diffractometer data: CaAl2Si2 type, P3m1, a = 444.99(9), c = 735.0(1) pm, wR2 = 0.0372, 200 F-2 values and 10 variables. The two-dimensional [Cd2X2] networks consist of edge-sharing CdX4/4 tetrahedra. The networks are separated and charge-balanced by the europium and ytterbium atoms. Redetermination of the magnetic properties revealed divalent europium and ytterbium. YbCd2Sb2 is diamagnetic. For the europium compounds only one magnetic phase transition is evident, i.e. T-C = 11.6 K for EuCd2P2, T-N = 9.5 K for EuCd2As2, and T-N = 7.4 K for EuCd2Sb2. Eu-151 Mossbauer spectra show full magnetic hyperfine field splitting at 4.2 K. A transferred hyperfine field of 7.1 T is evident in the 4.2 K Sb-121 spectrum of EuCd2Sb2.

引用

页码：1863 / 1870

页数：8

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