Giant and Reversible Inverse Barocaloric Effects near Room Temperature in Ferromagnetic MnCoGeB0.03. Issue 37 (5th August 2019)

• Record Type: Journal Article
• Authors: Aznar, Araceli; Lloveras, Pol; Kim, Ji‐Yeob; Stern‐Taulats, Enric; Barrio, María; Tamarit, Josep Lluís; Sánchez‐Valdés, César F.; Sánchez Llamazares, José Luis; Mathur, Neil D.; Moya, Xavier
• Is Part Of: Advanced materials. Volume 31:Issue 37(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-08-05
• Subjects: barocaloric materials -- environmentally friendly cooling -- energy efficient; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201903577
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Hydrostatic pressure represents an inexpensive and practical method of driving caloric effects in brittle magnetocaloric materials, which display first‐order magnetostructural phase transitions whose large latent heats are traditionally accessed using applied magnetic fields. Here, moderate changes of hydrostatic pressure are used to drive giant and reversible inverse barocaloric effects near room temperature in the notoriously brittle magnetocaloric material MnCoGeB0.03 . The barocaloric effects compare favorably with those observed in barocaloric materials that are magnetic. The inevitable fragmentation provides a large surface for heat exchange with pressure‐transmitting media, permitting good access to barocaloric effects in cooling devices. Abstract : Hydrostatic pressure represents an inexpensive and practical method of driving caloric effects in brittle magnetocaloric materials, whose large latent heats are traditionally accessed using an applied magnetic field. The inevitable fragmentation provides a large surface for heat exchange with pressure‐transmitting media, permitting good access to barocaloric effects in cooling devices.