Dong Jinou, Ding Cui, Zhao Xueqin, Xie Lingfeng, Yang Qiaolin, Pan Xun, Zhi Guoxiang, Fu Licheng, Gu Yilun, Ning Fanlong
Zhejiang Province Key Laboratory of Quantum Technology and Device and School of Physics, Zhejiang University, Hangzhou, 310027, China.
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
Sci Rep. 2023 Sep 5;13(1):14637. doi: 10.1038/s41598-023-41895-8.
We report the ferromagnetism in a new bulk form Cu-based magnetic semiconductor (La,Ba)(Cu,Mn)SO, which is iso-structural to the prototypical iron-based 1111-type superconductor LaFeAsO. Starting from the parent compound LaCuSO, carriers are introduced via the substitutions of La for Ba while spins are introduced via the substitutions of Cu for Mn. Spins are mediated by carriers, which develops into the long range ferromagnetic ordering. The maximum Curie temperature [Formula: see text] reaches up to [Formula: see text] 170 K with the doping levels of 10% Ba and 5% Mn. By comparing to the (La,Sr)(Cu,Mn)SO where Sr and Mn are co-doped into LaCuSO, we demonstrate that negative chemical pressure would suppress the ferromagnetic ordering.
我们报道了一种新型块状铜基磁性半导体(La,Ba)(Cu,Mn)SO中的铁磁性，它与典型的铁基1111型超导体LaFeAsO具有相同结构。从母体化合物LaCuSO出发，通过用Ba取代La引入载流子，同时通过用Mn取代Cu引入自旋。自旋由载流子介导，进而发展为长程铁磁有序。在Ba掺杂水平为10%和Mn掺杂水平为5%时，最大居里温度[公式：见原文]高达[公式：见原文]170K。通过与(Sr和Mn共掺杂到LaCuSO中的)(La,Sr)(Cu,Mn)SO进行比较，我们证明负化学压力会抑制铁磁有序。
