RIS ID
70092
Abstract
Ternary iron arsenide EuFe2 As2 with ThCr2 Si2 -type structure has been studied by magnetic susceptibility, resistivity, thermopower, Hall, and specific-heat measurements. The compound undergoes two magnetic phase transitions at about 200 and 20 K, respectively. The former was found to be accompanied with a slight drop in magnetic susceptibility (after subtracting the Curie-Weiss paramagnetic contribution), a rapid decrease in resistivity, a large jump in thermopower, and a sharp peak in specific heat with decreasing temperature, all of which point to a spin-density-wave-like antiferromagnetic transition. The latter was proposed to be associated with an A -type antiferromagnetic ordering of Eu2+ moments. Comparing with the physical properties of the isostructural compounds BaFe2 As2 and SrFe2 As2, we expect that superconductivity could be induced in EuFe2 As2 through appropriate doping.
Publication Details
Ren, Z., Zhu, Z., Jiang, S., Xu, X., Tao, Q., Wang, C., Feng, C., Cao, G. & Xu, Z. an. (2008). Antiferromagnetic transition in EuFe2As2: a possible parent compound for superconductors. Physical Review B: Condensed Matter and Materials Physics, 78 (5), 052501-1-052501-4.