Synthesis\nand Physical Properties of the Misfit Layered\nCompound (EuS)<sub>1.13</sub>(NbSe<sub>2</sub>)<sub>2</sub>
Nicholas Ng (676023)Daniel L. Foley (17297037)Xin Zhang (35492)Benjamin W. Y. Redemann (18554258)Mitra L. Taheri (1794550)Tyrel M. McQueen (1494640)
Abstract
A new misfit layered compound with\nthe stoichiometry\n(EuS)<sub>1+δ</sub>(NbSe<sub>2</sub>)<sub>2</sub> (δ ≈\n0.13)\nhas been successfully synthesized. High-resolution transmission electron\nmicroscopy and powder X-ray diffraction confirm the misfit structure\nwith (EuS)–(EuS) spacing of 18.30(1) Å. Magnetization,\nelectrical resistivity, heat capacity, and thermal transport measurements\nshow that the material is a heavily doped semiconductor or poor metal\nwith a low thermal conductivity of ∼1 W/m K and an antiferromagnetic\nordering transition at <i>T</i><sub>N</sub> = 4.7 K. In\ncontrast to the parent materials, the misfit is neither ferromagnetic\nnor superconducting down to <i>T</i> = 0.4 K. We find evidence\nof a field-driven transition to a ferromagnetic state due to reorientation\nof ferromagnetic EuS layers at μ<sub>o</sub><i>H</i> = 0.5 T at <i>T</i> = 2 K.
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