Thermodynamics of the Heat-Flux Avalanches at the First-Order Magnetic Transition in Magnetocaloric Materials
| Autor: | Vittorio Basso, Cecilia Bennati, Marco Piazzi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Phase transition
Materials science Condensed matter physics Operating frequency Nucleation General Physics and Astronomy Non-equilibrium thermodynamics Thermodynamics 02 engineering and technology 021001 nanoscience & nanotechnology First order 01 natural sciences Measure (mathematics) ELECTRON METAMAGNETIC TRANSITION CRITICAL SLOWING-DOWN FLOW MALDISTRIBUTION REFRIGERATION REGENERATORS TEMPERATURE PERFORMANCE KINETICS EXCHANGERS LA(FE0.88SI0.12)(13) Heat flux 0103 physical sciences Magnetic refrigeration 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Applied 8 (2017): 044023-1. doi:10.1103/PhysRevApplied.8.044023 info:cnr-pdr/source/autori:Piazzi M.; Bennati C.; Basso V./titolo:Thermodynamics of the Heat-Flux Avalanches at the First-Order Magnetic Transition in Magnetocaloric Materials/doi:10.1103%2FPhysRevApplied.8.044023/rivista:Physical Review Applied/anno:2017/pagina_da:044023-1/pagina_a:/intervallo_pagine:044023-1/volume:8 |
| Popis: | We investigate the kinetics of first-order magnetic phase transitions by measuring and modeling the heat-flux avalanches corresponding to the irreversible motion of the phase-boundary interface separating the coexisting low- and high-temperature stable magnetic phases. By means of out-of-equilibrium thermodynamics, we encompass the damping mechanisms of the boundary motion in a phenomenological parameter ?s. By analyzing the time behavior of the heat-flux signals measured on La(Fe-Mn-Si)13-H magnetocaloric compounds through Peltier calorimetry temperature scans performed at low rates, we relate the linear rise of the individual avalanches to the intrinsic-damping parameter ?s. |
| Databáze: | OpenAIRE |
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