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Magnetocaloric Effect for a Q-Clock-Type System.

Michel Aguilera1, Sergio Pino-Alarcón2, Francisco J Peña2,3

  • 1Instituto de Física, Pontificia Universidad Católica de Valparaíso, Casilla 4950, Valparaíso 2373223, Chile.

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Summary
This summary is machine-generated.

This study quantifies the magnetocaloric effect (MCE) in the Q-state clock model using Monte Carlo simulations. We identify optimal Q values that maximize MCE for various lattice sizes and magnetic field conditions.

Keywords:
Q-clockentropymagnetocaloric

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Area of Science:

  • Statistical physics
  • Quantum mechanics
  • Condensed matter physics

Background:

  • The Q-state clock model describes systems with multi-state interactions, relevant to diverse fields.
  • This model exhibits the Berezinskii-Kosterlitz-Thouless (BKT) phase for Q≥5, characterized by vortex states.

Purpose of the Study:

  • To investigate the magnetocaloric effect (MCE) in the Q-state clock model.
  • To determine the Q values that maximize MCE for different lattice sizes and magnetic field strengths.
  • To analyze magnetic phase transitions associated with the MCE process.

Main Methods:

  • Monte Carlo simulations were employed to calculate thermodynamic quantities.
  • Simulations were performed for even Q values (2 to 8) on various lattice sizes (N=8x8 to 128x128).
  • The magnetocaloric effect was quantified by analyzing entropy changes during isothermal magnetic field variations.

Main Results:

  • The study identified specific Q values that lead to maximum MCE, dependent on lattice size.
  • Magnetic phase transitions were observed and linked to the MCE process.
  • The relationship between Q, lattice size, and MCE was elucidated.

Conclusions:

  • The Q-state clock model provides a valuable framework for understanding MCE in multi-state systems.
  • Findings offer insights into applied quantum mechanics and statistical physics.
  • The research highlights the model's relevance in fields like percolation theory and neural networks.