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Field Angle Tuned Metamagnetism and Lifschitz Transitions in UPt3
B S Shivaram1, Ludwig Holleis2, V W Ulrich2
1Department of Physics, University of Virginia, Charlottesville, VA, 22904, USA. bss2d@virginia.edu.
Scientific Reports
|June 5, 2019
Summary
Researchers used ultrasound to discover new high-field spin phases in the quantum material UPt3. Magnetostriction and quantum oscillations confirm these transitions, revealing complex quantum spin behaviors.
Area of Science:
- Condensed Matter Physics
- Quantum Materials Science
Background:
- Strongly correlated electronic systems exhibit complex quantum spin states.
- Understanding and controlling these states in quantum materials is a key research area.
Purpose of the Study:
- To investigate new high-field spin phases in the quantum material UPt3.
- To characterize the nature of these phase transitions using various experimental probes.
Main Methods:
- Ultrasound (US) measurements to detect spin phase transitions.
- Magnetostriction (MS) measurements up to 65 Tesla.
- Magneto-acoustic quantum oscillations at low temperatures (<200 mK).
- High-resolution magnetization measurements.
Main Results:
- Identified clear signatures of new high-field spin phases in UPt3 via US and MS.
- Observed strong magneto-acoustic quantum oscillations near the c-axis (B||c-axis) between 24.8-30 T.
- Magnetization measurements indicated subtle transitions.
- Observed merging of US signatures with metamagnetic transitions, suggesting tricritical behavior at a specific angle (θ≈51°).
Conclusions:
- UPt3 exhibits distinct high-field spin phases.
- The study reveals complex phase transitions and potential tricritical behavior in this quantum material.
- Anisotropic magnetostriction plays a crucial role in the observed phenomena.
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