Filling the holes in the structure: Synthesis and magnetism of
Here, we investigate single crystals of CaCo5 As3 by means of single-crystal x-ray diffraction, microprobe, magnetic susceptibility, heat capacity, and pressure-dependent transport measurements. CaCo5 As3 shares the same structure of CaFe4 As3 with an additional Co atom filling a lattice vacancy and undergoes a magnetic transition at TM = 16 K associated with a frustrated magnetic order. CaCo5 As3 displays metallic behavior and its Sommerfeld coefficient (γ = 70 mJ/mol K2) indicates a moderate enhancement of electron-electron correlations. Transport data under pressures to 2.5 GPa reveal a suppression of TM at a rate of - 0.008 K/GPa. First-principles electronic structure calculations show a complex three-dimensional band structure and magnetic moments that depend on the local environment at each Co site. Our results are compared with previous data on CaFe4 As3 and provide a scenario for a magnetically frustrated ground state in this family of compounds.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1481129
- Alternate ID(s):
- OSTI ID: 1372941
- Report Number(s):
- LA-UR-17-30511; PRMHAR
- Journal Information:
- Physical Review Materials, Vol. 1, Issue 2; ISSN 2475-9953
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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