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Metamagnetic Anomalies near Dynamic Phase Transitions
P Riego1,2, P Vavassori1,3, A Berger1
1CIC nanoGUNE, E-20018 Donostia-San Sebastian, Spain.
Physical Review Letters
|April 4, 2017
Summary
Anomalous metamagnetic fluctuations near dynamic phase transitions (DPT) differ from standard thermodynamic behavior in ferromagnets. These DPT characteristics are tunable by adjusting the oscillating field amplitude.
Area of Science:
- Condensed Matter Physics
- Magnetism and Magnetic Materials
Background:
- Conventional thermodynamic phase transitions in ferromagnets are well-understood.
- Dynamic phase transitions (DPT) introduce unique behaviors not observed in static systems.
Purpose of the Study:
- To investigate anomalous metamagnetic fluctuations near DPT.
- To compare DPT characteristics with conventional thermodynamic phase transitions.
- To explore the tunability of DPT properties.
Main Methods:
- Experimental observation of metamagnetic fluctuations.
- Analysis of dynamic phase transitions under oscillating magnetic fields.
- Comparison with thermodynamic phase transition models.
Main Results:
- Anomalous metamagnetic fluctuations were observed near DPT.
- Key DPT characteristics were found to be qualitatively different from thermodynamic transitions.
- Metamagnetic fluctuations and critical scaling regimes were shown to be tunable by oscillating field amplitude.
Conclusions:
- Dynamic phase transitions exhibit distinct phenomena compared to thermodynamic transitions.
- Metamagnetic fluctuations are a key feature of DPT and are controllable.
- The amplitude of the driving oscillating field is a critical parameter for tuning DPT behavior.