Kinetic Ising model under sinusoidal oscillating external magnetic field: hysteresis and dynamic phase transition

Chattopadhyay, Sourav; Santra, S. B.

doi:10.1140/epjb/s10051-021-00081-3

Cited by 1 publication

(2 citation statements)

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“…For type-3 curves, hysteresis loops are always symmetric, so coercivity survives for entire frequency spectrum, indicating that the system resides in a dynamic paramagnetic phase. Similar arguments have also been underlined in a recent work by [75]. Besides, using an EFT formulation, influence of quenched bond dilution on the frequency evolutions of hysteresis loop area and hysteresis tools such as remanence and coercivity of a kinetic ferromagnetic Ising model has been reported by Vatansever et al [73] where it has been reported that increasing randomness drives the system from dynamically ordered state to dynamically disordered phase.…”

Section: Dynamic Hysteresis and Scaling Of The Dynamic Loop Areasupporting

confidence: 75%

“…To be more clear, γ exponents were found as approximately 1.2, 0.5 and 0.5 for the time-dependent Ginzburg-Landau, Glauber and Arrhenius techniques, respectively. (b) The second group is the group that consists of the studies where the effects of thermal fluctuations on the system driven by a time dependent magnetic field are partially or completely taken into account [48,[63][64][65][66][67][68][69][70][71][72][73][74][75][76][77]. It should be underlined that extensive numerical simulations have been undertaken by Acharyya and Chakrabarti for ferromagnetic Ising systems in two to four dimensions to clarify the variations of A with respect to frequency and amplitude of the external field and temperature of the system [78,79].…”

Section: Dynamic Hysteresis and Scaling Of The Dynamic Loop Areamentioning

confidence: 99%

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Dynamic phase transition in classical Ising models

Yüksel¹,

Vatansever²

2021

J. Phys. D: Appl. Phys.

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When a ferromagnetic system is driven by an oscillating magnetic field, the system shows various intriguing magnetic properties. The two most common features are dynamic phase transition and dynamic hysteresis resulting from the competition between the period of the external field and the metastable lifetime of the system. In this article, we mainly review the similarities and dissimilarities between ferromagnetic systems in thermal equilibrium and those exposed to a driving time-dependent magnetic field. Extensive studies performed over two decades have shown that dynamic and thermodynamic phase transitions correspond to the same universality class and have similar phase diagrams, among other similarities. Remarkably, recent experimental studies have revealed that both fluctuations in dynamic order parameter and susceptibility can demonstrate anomalously sharp sidebands, which are known as metamagnetic anomalies, in the dynamically paramagnetic phase close to the critical point. This behavior is one of the most interesting behaviors observed in the magnetic systems driven by a time-dependent field which does not have an analog in the corresponding equilibrium counterparts. We discuss the general picture regarding the effects of the applied field components on the metamagnetic anomalies. As a main conclusion, we remark that a comprehensive literature overview reveals that the similarities between conventional thermodynamic phase transitions and corresponding dynamic counterpart are only limited to the vicinity of critical period regime with zero bias field, and they should be treated very carefully in the presence of surfaces. Finally, some of the main questions waiting to be answered and potential future research directions are underlined.

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Section: Dynamic Hysteresis and Scaling Of The Dynamic Loop Areasupporting

confidence: 75%