Author:
Nie 聂 Yong 勇,Chen 陈 Zheng 正,Mei 梅 Ming 明,Wang 王 Yuan-Yuan 园园,Wu 吴 Jia-Ting 嘉挺,Jiang 蒋 Jia-Liang 佳良,Song 宋 Wen-Hai 文海,Ning 宁 Wei 伟,Wang 王 Zhao-Sheng 钊胜,Zhu 朱 Xiang-De 相德,Tian 田 Ming-Liang 明亮
Abstract
The compounds composed of transition metal cations and pnictide anions provide a rich platform for studying novel physical phenomena. Here we report on the observation of a phase transition at ∼ 70 K and 145 K in layered compound EuCu4As2 and SrCu4As2, respectively. from both the transport and heat capacity. The thermal expansion measurements show that the variation of the lattice parameters (ΔLb
/Lab
) around T
P is much less than that for a typical crystalline phase transition. Our experimental results reveal that the transition in EuCu4As2 and SrCu4As2 should be driven by subtle structural-distortion.
Subject
General Physics and Astronomy