Dynamical ground state in the XY pyrochlore Yb2GaSbO7
P M Sarte1,2,3,4, K Cruz-Kan5, B R Ortiz1,2
1California NanoSystems Institute, University of California, Santa Barbara, CA 93106-6105, USA.
Npj Quantum Materials
|August 17, 2023
Summary
Researchers investigated the magnetic Ytterbium Gallium Antimonide Oxide (Yb2GaSbO7) material. Findings reveal a fragile, dynamic magnetic state, suggesting potential spin-liquid or spin-singlet behavior, which transitions to ferromagnetism under a magnetic field.
Area of Science:
- Condensed Matter Physics
- Quantum Magnetism
- Materials Science
Background:
- The magnetic ground state of Ytterbium Gallium Antimonide Oxide (Yb2GaSbO7) pyrochlores has been unexplained for a decade.
- Persistent spin fluctuations at low temperatures challenge existing quantum magnetism theories.
Purpose of the Study:
- To synthesize and characterize Yb2GaSbO7.
- To elucidate the underlying physics of its enigmatic magnetic ground state.
Main Methods:
- DC and AC magnetic susceptibility measurements.
- Heat capacity analysis.
- Neutron scattering experiments.
- Muon spin relaxation (muSR) measurements (mentioned in background).
Main Results:
- Evidence for a dynamical magnetic ground state in Yb2GaSbO7.
- Yb2GaSbO7 is a candidate for disorder-induced spin-liquid or spin-singlet behavior.
- The dynamical state is fragile and transitions to a splayed ferromagnet at approximately 1.5 Tesla.
Conclusions:
- Yb2GaSbO7 exhibits a unique dynamical magnetic ground state.
- The material shows promise for realizing exotic quantum magnetic phenomena.
- External magnetic fields can significantly alter the magnetic state of Yb2GaSbO7.
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