Giant magnetocaloric effect in a Heusler Mn50Ni40In10 unidirectional crystal》.pdfVIP

Intermetallics 65 (2015) 10e14 Contents lists available at ScienceDirect Intermetallics journal homepage: /locate/intermet Giant magnetocaloric effect in a Heusler Mn50Ni40In10 unidirectional crystal Jian Ren a, b, Hongwei Li a, b, Shutong Feng a, b, Qijie Zhai a, Jianxun Fu a, Zhiping Luo c, Hongxing Zheng a, b, * a State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200072, China b Laboratory for Microstructures, Shanghai University, Shanghai 200072, China c Department of Chemistry and Physics, Fayetteville State University, Fayetteville, NC 28301, USA a r t i c l e i n f o a b s t r a c t Article history: A modified high-pressure optical zone-melting technique was used to grow a Mn-rich Heusler Received 19 March 2015 Mn50Ni40In10 unidirectional crystal. Experimental results showed that the produced unidirectional Received in revised form crystal underwent a magnetic transition in austenite, followed with a martensitic transformation from a 6 May 2015 ferromagnetic austenite to a ferromagnetic martensite upon cooling. Under a magnetic field change of Accepted 8 May 2015 30 kOe, the total effective refrigeration capacities (RCtotal) reached as high as 231.58 J/kg when the Available online 29 May 2015 magnetic field was applied along parallel to the crystal growth direction, or 246.79 J/kg when the