Published November 2019 | Version v1
Journal article Metadata-only

The refrigerant capacity in spin-crossover materials: Application to [Fe(phen)2(NCS)2]

Creators

  • 1. Instituto de Física Armando Dias Tavares, Universidade do Estado do Rio de Janeiro UERJ, Rua São Francisco Xavier, 524, 20550-013 Rio de Janeiro, RJ (Brazil)
  • 2. Grupo de Materiais Inorgânicos Multifuncionais (GMIM), Instituto de Química, Universidade do Estado do Rio de Janeiro UERJ, Rua São Francisco Xavier, 524, 20550-013 Rio de Janeiro, RJ (Brazil)
  • 3. Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, 24210-346 Niterói, RJ (Brazil)
  • 4. Instituto de Aplicação Fernando Rodrigues da Silveira, Universidade do Estado do Rio de Janeiro UERJ, Rua Santa Alexandrina 288, 20261-232 RJ (Brazil)

Description

The next-generation of refrigerant materials should be based on solid materials with big entropy-driven conversion when submitted to an external stimulus change. We report the refrigerant capacity (RC = 2950 J kg−1, upon pressure change of ΔP = 1 kbar) in one of the most known and investigated spin-crossover material [Fe(phen)2(NCS)2]. Our indirect obtained experimental data for the isothermal entropy change (ΔST = 78 Jkg−1K−1) and the adiabatic temperature change (ΔTad = 11 K) for ΔP = 1 kbar, agree with our theoretical calculations. From comparison between the thermodynamic and microscopic entropy descriptions, the origin of the barocaloric effect was ascribed to the pressure phonons activation in spin-crossover materials. Besides, a proper refrigeration thermodynamic cycle (Ericsson cycle) was quantitatively used for showing the refrigeration capacity of [Fe(phen)2(NCS)2].

Additional details

Identifiers

DOI
10.1016/j.jmmm.2019.165421;
PII
S0304885319315641;

Publishing Information

Journal Title
Journal of Magnetism and Magnetic Materials
Journal Volume
489
Journal Page Range
vp.
ISSN
0304-8853
CODEN
JMMMDC

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
55025043
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ENTROPY; ERICSSON CYCLE; PHONONS; REFRIGERANTS; REFRIGERATION; SOLIDS; SPIN; THERMODYNAMICS
Descriptors DEC
ANGULAR MOMENTUM; COOLING; FLUIDS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; QUASI PARTICLES; THERMODYNAMIC CYCLES; THERMODYNAMIC PROPERTIES; WORKING FLUIDS

Optional Information

Copyright
Copyright (c) 2019 Elsevier B.V. All rights reserved.