Abstract
Here we investigate the thermodynamic and electronic properties of single crystals. Electrical transport data show that has a semiconducting ground state with a relatively narrow band gap of 320 meV. Magnetic susceptibility data reveal antiferromagnetic order at low temperatures, whereas ferromagnetic interactions dominate at high temperature. Specific heat, magnetic susceptibility, and electrical resistivity measurements reveal three phase transitions at K, K, and K. Unlike , a related europium-containing Zintl compound, no colossal magnetoresistance (CMR) is observed in . We attribute the absence of CMR to the smaller carrier density and the larger distance between Eu ions and In-Sb polyhedra in . Our results indicate that has potential applications as a thermoelectric material through doping or as a long-wavelength detector due to its narrow gap.
- Received 11 May 2021
- Accepted 14 July 2021
DOI:https://doi.org/10.1103/PhysRevMaterials.5.074603
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