Abstract
We report the impact of magnetic impurity substitution on the quantum disordered magnetic ground state of NaRuO2. Local S=5/2 moments are introduced into the frustrated triangular lattice of Jeff=1/2 Ru moments via Fe substitution in NaFexRu1-xO2, and the evolution of the magnetic ground state is reported. Local spin freezing associated with conventional spin-glass behavior is observed upon Fe substitution, marking an impurity-induced freezing of the primarily dynamic magnetic ground state in NaRuO2. Furthermore, local Fe moments induce a Curie-Weiss magnetic behavior in the uniform magnetic susceptibility, and the local moment magnitude is best described by dynamic Ru moments polarized about impurity sites. Our results establish an impurity-doping phenomenology consistent with inherently dynamic moments in NaRuO2 that are pinned by local magnetic impurities, similar to "swiss cheese"models of impurity-substituted copper oxides.
| Original language | English |
|---|---|
| Article number | 024404 |
| Journal | Physical Review Materials |
| Volume | 9 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2025 |
Funding
This work was supported by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Grant No. DE-SC0017752. The research made use of the shared facilities of the NSF Materials Research Science and Engineering Center at UC Santa Barbara (Award No. DMR-1720256). The UC Santa Barbara MRSEC is a member of the Materials Research Facilities Network [43]. This work also used facilities supported via the UC Santa Barbara NSF Quantum Foundry funded via the Q-AMASE-i program under Award No. DMR-1906325. This work was supported by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Grant No. DE-SC0017752. The research made use of the shared facilities of the NSF Materials Research Science and Engineering Center at UC Santa Barbara (Award No. DMR-1720256). The UC Santa Barbara MRSEC is a member of the Materials Research Facilities Network . This work also used facilities supported via the UC Santa Barbara NSF Quantum Foundry funded via the Q-AMASE-i program under Award No. DMR-1906325.