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 - 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.
UR - http://www.scopus.com/inward/record.url?scp=85104226652&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85104226652&partnerID=8YFLogxK
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 -