TY - JOUR
T1 - Widely spaced planes of magnetic dimers in the Ba6 Y2Rh2Ti2 O17-δ hexagonal perovskite
AU - Nguyen, Loi T.
AU - Straus, Daniel B.
AU - Zhang, Q.
AU - Cava, R. J.
N1 - Funding Information:
The authors acknowledge the use of Princeton's Imaging and Analysis Center, which is partially supported by the Princeton Center for Complex Materials, a National Science Foundation (NSF)-MRSEC program (Grant No. DMR-1420541). All of the research reported here was supported by the Institute of Quantum Matter, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0019331. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.
Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/3
Y1 - 2021/3
N2 - We report the synthesis and initial characterization of Ba6Y2Rh2Ti2O17-δ, a previously unreported material, to the best of our knowledge, with a hexagonal symmetry structure. Face-sharing RhO6 octahedra form triangular planes of Rh2O9 dimers that are widely separated in the perpendicular direction. The material displays a small effective magnetic moment, due to the Rh ions present, and a negative Curie-Weiss temperature. The charge transport and optical band gaps are very similar, near 0.16 eV. A large upturn in the heat capacity at temperatures below 1 K, suppressed by applied magnetic fields larger than μ0H=2T, is observed. A large T-linear term in the specific heat (γ=166mJ/molf.uK2) is seen, although the material is insulating at low temperatures. These results suggest the possibility of a spin liquid ground state in this material.
AB - We report the synthesis and initial characterization of Ba6Y2Rh2Ti2O17-δ, a previously unreported material, to the best of our knowledge, with a hexagonal symmetry structure. Face-sharing RhO6 octahedra form triangular planes of Rh2O9 dimers that are widely separated in the perpendicular direction. The material displays a small effective magnetic moment, due to the Rh ions present, and a negative Curie-Weiss temperature. The charge transport and optical band gaps are very similar, near 0.16 eV. A large upturn in the heat capacity at temperatures below 1 K, suppressed by applied magnetic fields larger than μ0H=2T, is observed. A large T-linear term in the specific heat (γ=166mJ/molf.uK2) is seen, although the material is insulating at low temperatures. These results suggest the possibility of a spin liquid ground state in this material.
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U2 - 10.1103/PhysRevMaterials.5.034419
DO - 10.1103/PhysRevMaterials.5.034419
M3 - Article
AN - SCOPUS:85104226652
SN - 2475-9953
VL - 5
JO - Physical Review Materials
JF - Physical Review Materials
IS - 3
M1 - 034419
ER -