Magnetic properties of layered rare-earth oxy-carbonates Ln2O2CO3 (Ln = Nd, Sm, and Dy)

被引：11

作者：

Arjun, U. ^{[1
]}

Brinda, K. ^{[1
]}

Padmanabhan, M. ^{[2
]}

Nath, R. ^{[1
]}

机构：

[1] Indian Inst Sci Educ & Res, Sch Phys, Thiruvananthapuram 695016, Kerala, India

[2] Amrita Vishwa Vidyapeetham Univ, Dept Chem, Amritapuri 690525, Kollam, India

来源：

SOLID STATE COMMUNICATIONS | 2016年 / 240卷

关键词：

Magnetically ordered materials; Chemical synthesis; Exchange and superexchange; CRYSTAL-STRUCTURE;

D O I：

10.1016/j.ssc.2016.04.007

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Polycrystalline samples of rare-earth oxy-carbonates Ln(2)O(2)CO(3) (Ln = Nd, Sm, and Dy) are synthesized and their structural and magnetic properties are investigated. All of them crystallize in a hexagonal structure with space group P6(3)/mmc. They form a double layered structure with frustrated triangular arrangement of rare-earth magnetic ions. An antiferromagnetic transition is observed at T-N similar to 1.25 K, 0.61 K, and 1.21 K for Nd2O2CO3, Sm2O2CO3, and Dy2O2CO3, respectively. From the analysis of magnetic susceptibility, the value of the Curie-Weiss temperature theta(CW) is obtained to be similar to 21.7 K, 18 K, and 10.6 K for Nd2O2CO3, Sm2O2CO3, and Dy2O2CO3, respectively. The magnetic frustration parameter f(= vertical bar theta(CW)vertical bar/T-N) is calculated to be similar to 17.4, 31, and 8.8 for Nd2O2CO3, Sm2O2CO3, and Dy2O2CO3, respectively, which indicates that Sm2O2CO3 is strongly frustrated compared to its Nd and Dy analogues. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1 / 4

页数：4

共 31 条

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