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General existence and determination of conjugate fields in dynamically ordered magnetic systems
1CIC nanoGUNE BRTA, E-20018 Donostia-San Sebastian, Spain.
Physical Review. E
|November 16, 2021
Summary
We explored dynamic magnetic phase diagrams using novel magnetic field sequences. A second-harmonic field component significantly impacts paramagnetic phases and shifts critical transition points.
Area of Science:
- Condensed Matter Physics
- Magnetism and Magnetic Materials
- Nonlinear Dynamics
Background:
- Understanding dynamic magnetic phase diagrams is crucial for magnetic materials.
- Non-antisymmetric magnetic fields introduce complex behaviors.
- Previous studies have not fully explored the impact of second-harmonic fields.
Purpose of the Study:
- To investigate the dynamic magnetic phase diagram under a specific non-antisymmetric magnetic field.
- To analyze the role of a second-harmonic field component (H₂) on magnetic phase transitions.
- To identify a generalized conjugate field (H*) for the dynamic order parameter (Q).
Main Methods:
- Experimental investigation of dynamic magnetic phase diagrams.
- Theoretical analysis of magnetic systems subjected to a composite magnetic field.
- Application of a magnetic field sequence with fundamental (H₀), bias (Hb), and second-harmonic (H₂) components.
Main Results:
- Demonstrated a generalized conjugate field (H*) for the dynamic order parameter (Q).
- Observed significant susceptibility of the paramagnetic phase to the second-harmonic field component (H₂).
- Found minor phase-space modifications in ferromagnetic and anomalous paramagnetic regions due to H₂.
- Observed a shift in the critical phase transition point with the introduction of H₂.
Conclusions:
- The second-harmonic field component (H₂) introduces an effective bias, influencing the dynamic magnetic phase diagram.
- The dynamic behavior of magnetic systems is governed by the total effective amplitude of the applied field sequence.
- The critical point of magnetic phase transitions is sensitive to the presence of second-harmonic fields.
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