Room-temperature barocaloric effect in [Fe(pap 5NO2)2] spin-crossover material [Dataset]
We examine the pressure dependence of the spin-crossover transition in [Fe(pap-5NO2)2] that occurs near room temperature. We employ a combination of high-pressure calorimetry and powder X-ray diffraction measurements, conducted both under variable-pressure and variable temperature conditions. Both m...
| Autores: | , , , , , , , , |
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| Tipo de documento: | conjunto de datos |
| Data de publicação: | 2024 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/375346 |
| Acesso em linha: | http://hdl.handle.net/10261/375346 https://doi.org/10.20350/digitalCSIC/16990 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Energy Barocaloric effect Spin-crossover Synchrotron Magnetism High pressure |
| Resumo: | We examine the pressure dependence of the spin-crossover transition in [Fe(pap-5NO2)2] that occurs near room temperature. We employ a combination of high-pressure calorimetry and powder X-ray diffraction measurements, conducted both under variable-pressure and variable temperature conditions. Both methods indicate that the spin-crossover transition shifts linearly to higher temperatures with increasing pressure, while simultaneously exhibiting an increase in the width of the thermal hysteresis. We report a giant barocaloric effect, revealing isothermal entropy changes in the 70.2-79.1 J kg-1 K-1 range and adiabatic temperature changes between 19.6 and 25.9 K for a pressure change of 2 kbar. Although the effect diminishes under reversible conditions, it remains substantial, with values of 70.2 J kg-1 K-1 and 13.5 K, respectively. |
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