title: Inverse barocaloric effect in the giant magnetocaloric La-Fe-Si-Co compound.
abstract: Application of hydrostatic pressure under adiabatic conditions causes a change in temperature in any substance. This effect is known as the barocaloric effect and the vast majority of materials heat up when adiabatically squeezed, and they cool down when pressure is released (conventional barocaloric effect). There are, however, materials exhibiting an inverse barocaloric effect: they cool when pressure is applied, and they warm when it is released. Materials exhibiting the inverse barocaloric effect are rather uncommon. Here we report an inverse barocaloric effect in the intermetallic compound La-Fe-Co-Si, which is one of the most promising candidates for magnetic refrigeration through its giant magnetocaloric effect. We have found that application of a pressure of only 1 kbar causes a temperature change of about 1.5 K. This value is larger than the magnetocaloric effect in this compound for magnetic fields that are available with permanent magnets.
authors.affiliation: Departament d'Estructura i Constituents de la Matèria. Facultat de Física. Universitat de Barcelona. Diagonal 645. Barcelona Knowledge Campus (BKC), 08028 Barcelona, Catalonia, Spain. lluis@ecm.ub.es
authors.forename: Lluís
authors.initials: L
authors.lastname: Mañosa
authors.forename: David
authors.initials: D
authors.lastname: González-Alonso
authors.forename: Antoni
authors.initials: A
authors.lastname: Planes
authors.forename: Maria
authors.initials: M
authors.lastname: Barrio
authors.forename: Josep-Lluís
authors.initials: JL
authors.lastname: Tamarit
authors.forename: Ivan S
authors.initials: IS
authors.lastname: Titov
authors.forename: Mehmet
authors.initials: M
authors.lastname: Acet
authors.forename: Amitava
authors.initials: A
authors.lastname: Bhattacharyya
authors.forename: Subham
authors.initials: S
authors.lastname: Majumdar
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002151:Calorimetry; D002627:Chemistry, Physical; D003035:Cobalt / Q000737:chemistry; D006874:Hydrostatic Pressure; D007501:Iron / Q000737:chemistry; D007811:Lanthanum / Q000737:chemistry; D008280:Magnetics / Q000379:methods*; D059346:Magnets; D012034:Refrigeration / Q000379:methods*; D012825:Silicon / Q000737:chemistry; D013696:Temperature; D013816:Thermodynamics
chemical_list: D000497:Alloys; D003035:Cobalt; D007811:Lanthanum; D007501:Iron; D012825:Silicon