Magnetic Dilution in Ilmenite Materials
ORAL
Abstract
Topological Dirac magnons offer a pathway for dissipationless spin wave transport in magnetic insulators, avoiding the Joule losses inherent to conventional electronics. NiTiO₃ and CoTiO₃ belong to the ilmenite family of oxides (ABO₃, R3̅ symmetry), where the latter has been shown to host Dirac magnon crossings in inelastic neutron scattering experiments. Both compounds crystallize in a rhombohedral structure comprising edge-shared octahedra and exhibit A-type antiferromagnetic order below their respective Néel temperature of 23K and 38K.
We present the effects of magnetic dilution in Co1-xMgxTiO3 and Ni1-xMgxTiO3. By tracing the evolution of TN, effective magnetic moment (μₑff), and Curie-Weiss temperature as a function of non-magnetic Mg substitution (x). We show that all parameters are tuned linearly as a function of magnetic dilution in these materials. This work provides a framework to understand the microscopy models describing magnetic ilmenites with potential for Dirac magnons.
We present the effects of magnetic dilution in Co1-xMgxTiO3 and Ni1-xMgxTiO3. By tracing the evolution of TN, effective magnetic moment (μₑff), and Curie-Weiss temperature as a function of non-magnetic Mg substitution (x). We show that all parameters are tuned linearly as a function of magnetic dilution in these materials. This work provides a framework to understand the microscopy models describing magnetic ilmenites with potential for Dirac magnons.
*The work at Boston College was funded under NSF-GRFP award No. 5115152 and NSF-DMREF award No. 2522382.
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Presenters
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Enrique O Gonzalez Delgado
- Boston College