Planar XY magnetic glass state in the Gd2ScNbO7pyrochlore
C Mauws1,2, J Beare3, M R Rutherford3
1Department of Chemistry, University of Manitoba, Winnipeg R3T 2N2, Canada.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|September 4, 2024
Summary
This study investigates a novel spin glass system, Gd2ScNbO7, revealing emergent planar spin clusters. Despite antiferromagnetic interactions, it exhibits short-range order and a disordered magnetic state instead of long-range ordering.
Area of Science:
- Condensed matter physics
- Magnetism
- Materials science
Background:
- Pyrochlore materials are known for complex magnetic behaviors.
- Understanding disordered magnetic states is crucial for novel electronic applications.
- Gadolinium-based pyrochlores offer a platform for studying spin frustration.
Purpose of the Study:
- To synthesize and characterize the mixed B-site pyrochlore Gd2ScNbO7.
- To investigate the magnetic properties and ground state of this material.
- To explore the emergence of spin clusters and short-range order.
Main Methods:
- X-ray diffraction for structural characterization.
- Magnetic susceptibility and heat capacity measurements for thermodynamic properties.
- Muon spin relaxation and neutron scattering for magnetic ordering and dynamics.
Main Results:
- Gd2ScNbO7 exhibits antiferromagnetic interactions (Curie-Weiss temperature of -3.93(3) K) but no long-range magnetic ordering down to 0.3 K.
- A disordered magnetic state with a small correlation length (2.1(1) Å) and emergent XY spin ordering was observed.
- Muon spin relaxation and AC susceptibility confirmed a spin glass state with reduced entropy.
Conclusions:
- Gd2ScNbO7 forms a spin glass with short-range antiferromagnetic and emergent XY spin order.
- The material's magnetic ground state resembles Gd2Sn2O7 above its ordering temperature, but without long-range order.
- This research provides insights into frustrated magnetism and disordered states in pyrochlore systems.
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