Understanding temperature-modulated calorimetry through studies of a model system
| العنوان: | Understanding temperature-modulated calorimetry through studies of a model system |
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| المؤلفون: | Michel PEYRARD, Jean-Luc Garden |
| المساهمون: | Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure de Lyon (ENS de Lyon)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Physical Review E Physical Review E, 2022, 105 (3), pp.034144. ⟨10.1103/PhysRevE.105.034144⟩ |
| بيانات النشر: | American Physical Society (APS), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Statistical Mechanics (cond-mat.stat-mech), Physics::Instrumentation and Detectors, Classical Physics (physics.class-ph), FOS: Physical sciences, Physics - Classical Physics, [PHYS.COND.CM-SM]Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech], Physics::Chemical Physics, ComputingMilieux_MISCELLANEOUS, Condensed Matter - Statistical Mechanics |
| الوصف: | Temperature Modulated calorimetry is widely used but still raises some fundamental questions. In this paper we study a model system as a test sample to address some of them. The model has a nontrivial spectrum of relaxation times. We investigate temperature modulated calorimetry at constant average temperature to precise the meaning of the frequency-dependent heat capacity, its relation with entropy production, and how such measurements can observe the aging of a glassy sample leading to a time-dependent heat capacity. The study of the Kovacs effect for an out-of-equilibrium system shows how temperature modulated calorimetry could contribute to the understanding of this memory effect. Then we compare measurements of standard scanning calorimetry and temperature-modulated calorimetry and show how the two methods are complementary because they do not observe the same features. While it can probe the time scales of energy transfers in a system, even in the limit of low frequency temperature modulated calorimetry does not probe some relaxation phenomena which can be measured by scanning calorimetry, as suggested by experiments with glasses. Published in Phys. Rev. E, 31 March 2022 |
| تدمد: | 2470-0053 2470-0045 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49252da209d689859613c645caa6a073 https://doi.org/10.1103/physreve.105.034144 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....49252da209d689859613c645caa6a073 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24700053 24700045 |
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