A cerium containing pnictide, CeNiAsO, crystallized in the ZrCuSiAs type structure, has been investigated by measuring transport and magnetic properties, as well as specific heat. We found that CeNiAsO is an antiferromagnetic dense Kondo lattice metallic compound with Kondo scale TK∼ 15 K and shows an enhanced Sommerfeld coefficient of γ0∼ 203 mJ/mol⋅K2. While no superconductivity can been observed down to 30 mK, Ce ions exhibit two successive antiferromagnetic (AFM) transitions. We propose that the magnetic moment of Ce ion could align in the G type AFM order below the first transition at TN1=9.3 K, and it might be modified into the C type AFM order below a lower transition at TN2=7.3 K. Our results indicate that the 3d−4f interlayer Kondo interactions play an important role in Ni-based Ce-containing pnictide.
@article{arxiv.1103.3073,
title = {CeNiAsO: an antiferromagnetic dense Kondo lattice},
author = {Yongkang Luo and Han Han and Hao Tan and Xiao Lin and Yuke Li and Shuai Jiang and Chunmu Feng and Jianhui Dai and Guanghan Cao and Zhu'an Xu and Shiyan Li},
journal= {arXiv preprint arXiv:1103.3073},
year = {2015}
}
Comments
13 pages, 5 figures, to appear in J. Phys.: Condens. Matter