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Mechanocalorics

Xavier Moya

Mechanocaloric effects arise in materials when changes in applied stress produce thermal changes. Giant mechanocaloric effects have therefore been suggested for cooling applications that are environmentally friendly and energy efficient. We study a range of elastocaloric materials driven by uniaxial stress, and a range of barocaloric materials driven by hydrostatic pressure, using a range of measurement techniques, in this nascent research area.

Image: Refrigerant capacity of different giant barocaloric materials at different values of applied pressure change |∆p|. After Nature Communications 6, (2015) 8801.

Image: Refrigerant capacity of different giant barocaloric materials at different values of applied pressure change |∆p|. After Nature Communications 6, (2015) 8801.

 

Giant barocaloric effects at low pressure in ferrielectric ammonium sulphate P. Lloveras, E. Stern-Taulats, M. Barrio, J.-Ll. Tamarit, S. Crossley, W. Li, V. Pomjakushin, A. Planes, Ll. Man˜osa, N. D. Mathur and X. Moya Nature Communications 6 (2015) 8801.

New developments in caloric materials for cooling applications S. Crossley, N. D. Mathur and X. Moya AIP Advances 5 (2015) 067153.

Too cool to work X. Moya, E. Defay, V. Heine and N. D. Mathur Nature Physics 11 (2015) 202.

Caloric materials near ferroic phase transitions X. Moya, S. Kar-Narayan and N. D. Mathur Nature Materials 13 (2014) 439.