镧锶钾钠铜氧化物的合成、结构与超导性

Synthesis, structure, and superconductivity of La Sr K Na CuO.

作者信息

Xu Deyang, Cai Guohong, Huang Peiliang, Wu Xi, Wang Yan, Geng Jinling, Ju Jing, Wang Xiaoge, Yin Congling, Li Guobao

机构信息

MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology Guilin 541004 People's Republic of China.

Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 People's Republic of China.

出版信息

RSC Adv. 2024 Nov 6;14(48):35391-35399. doi: 10.1039/d4ra06045h. eCollection 2024 Nov 4.

DOI:10.1039/d4ra06045h

PMID:39507688

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11538971/

Abstract

Sodium and potassium have been doped into LaSrCuO to form La Sr K Na CuO solid solutions by a solid-state reaction, which crystallizes in the 4/ space group when 0 ≤ < 0.16 and when 0.16 < ≤ 0.25. With the equivalent replacement of four Sr by one Na, one K and two La, it is very interesting to find that (the definition is presented in the introduction part) of La Sr K Na CuO does not remain constant with an increase in but first increases from 14.8 K for = 0.00 to 33.9 K for = 0.10 and then decreases to 18.5 K for = 0.175.

摘要

通过固态反应将钠和钾掺杂到LaSrCuO中以形成LaSrKNaCuO固溶体，当0≤x＜0.16时，其在4/空间群中结晶，当0.16＜x≤0.25时，其在另一种空间群中结晶。用一个钠、一个钾和两个镧等效替代四个锶后，有趣的是发现LaSrKNaCuO的Tc（定义在引言部分给出）并不随x的增加而保持恒定，而是首先从x = 0.00时的14.8 K增加到x = 0.10时的33.9 K，然后降至x = 0.175时的18.5 K。