Universal Single-Ion Physics in Spin–Orbit-Coupled d5 and d4 IonsClick to copy article linkArticle link copied!
- Hongcheng LuHongcheng LuInstitute for Quantum Matter and Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, United StatesMore by Hongcheng Lu
- Juan R. ChamorroJuan R. ChamorroInstitute for Quantum Matter and Department of Physics and Astronomy and Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United StatesMore by Juan R. Chamorro
- Cheng WanCheng WanDepartment of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United StatesMore by Cheng Wan
- Tyrel M. McQueen*Tyrel M. McQueen*E-mail: [email protected] (T.M.M.).Institute for Quantum Matter and Department of Physics and Astronomy, Department of Chemistry and Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, United StatesMore by Tyrel M. McQueen
Abstract

We have identified six new 4d4 and 4d5 compounds with isolated RuCl6 octahedra, with formulas (HMA)4RuCl6·Cl (1; MA = methylamine), (HGly)4RuCl6·Cl (2; gly = glycine), (HGly)3RuCl6·2H2O (3), (NH4)2RuCl6 (4), (HPy)2RuCl6 (5; py = pyridine), and H2(4,4′-bpy)RuCl6 (6; 4,4′-bpy = 4,4′-bipyridine). We find that the temperature-dependent magnetization is well described by single-ion physics in the presence of spin–orbit coupling and negligible superexchange interactions. Further, we find that many compounds in the literature are also well described by single-ion physics, and our results demonstrate the importance of considering single-ion physics when evaluating candidate geometric frustrated magnets in the presence of spin–orbit coupling.
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