2009/07/31 by Yongkang Luo, Yuke Li, Shuai Jiang +5 · 64 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Computer science #Intellectual Capital and Performance Analysis #Iron-based superconductors research #Rare-earth and actinide compounds #cond-mat.mtrl-sci #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.81.134422
published in Physical Review B 81(13) (American Physical Society) · 7 pages, 6 figures, text and figures revised, references added.
openalex publication_date 2010/04/19 · arxiv created 2010/04/24 · arxiv updated 2010/04/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We performed a systematic study on the properties of CeFeAs_1\ensuremath-xPxO (0\ensuremath≤x\ensuremath≤1) by electrical resistivity, magnetization, and specific heat measurements. The c-axis lattice constant decreases significantly with increasing P content, suggesting a remarkable chemical pressure. The Fe 3d electrons show the enhanced metallic behavior upon P doping and undergo a magnetic quantum phase transition around x\ensuremath≈0.4. Meanwhile, the Ce 4f electrons develop a ferromagnetic order near the same doping level. The ferromagnetic order is vanishingly small around x=0.9. The data suggest a heavy-fermionlike behavior as x\ensuremath≥0.95. No superconductivity is observed down to 2 K. Our results show the ferromagnetic ordered state as an intermediate phase intruding between the antiferromagnetic bad metal and the nonmagnetic heavy-fermion metal and support the cerium-containing iron pnictides as a unique layered Kondo lattice system.