Coexistence of antiferromagnetism and superconductivity in CeCo(In0.9Cd0.1)5: A spin lattice relaxation study

✍ Scribed by R.R. Urbano; B.-L. Young; N.J. Curro; J.D. Thompson; L.D. Pham; Z. Fisk

• Book ID: 104080101
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 214 KB
• Volume: 403
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2007.10.280

✦ Synopsis

We present an In(1) NQR study on the heavy-fermion (HF) compound CeCo(In 1Àx Cd x ) 5 ðx ¼ 0:10Þ. Bulk measurements indicate that Cd doping acts as an electronic tuning agent in CeCoIn 5 , and that superconductivity (SC) and antiferromagnetism (AFM) may coexist at ambient pressure for 0:05oxo0:15. For x ¼ 0:10, the nuclear spin lattice relaxation rate shows a broad peak at the Ne´el temperature T N ¼ 2:8 K, with a subsequent onset of SC at T c ' 1:2 K. Our results provide strong evidence for microscopic coexistence of these two ground states. The nuclear magnetization recovery curves in both the ordered and mixed states reveal a single T 1 -component, which suggests a homogeneous nature of the Ce-4f 1 electronic state.