High Temperature Martensitic Transformation and Giant Magnetocaloric Effect in Ni40Co10Mn41Sn9 Melt-Spun Ribbons

F. Chen, J. L. Sánchez Llamazares, C. F. Sánchez-Valdés, P. Müllner, Y. G. Shi, Y. X. Tong, L. Li

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We report a large magnetic entropy change associated with a high-temperature martensitic transformation in Ni40Co10Mn41Sn9 (at. %) melt-spun ribbons. The ribbons underwent a first-order forward martensitic transition and a reverse structural transition from the paramagnetic six-layered modulated martensite to a ferromagnetic austenite in the temperature range of 395–380 K. For a magnetic field change of 5 T (2 T), extremely large magnetic entropy changes of 33.9 (25) J kg−1 K−1 and 53 (22) J kg−1 K−1 upon reverse and forward martensitic transformations occurred. These values are among the largest for Ni-Mn based Heusler alloys reported so far. As compared with the large values upon heating, hysteresis losses upon cooling were negligibly low (only 0.36 J kg−1). The present findings open up the possibility of elevated temperature magnetic cooling.

Original languageAmerican English
Pages (from-to)493-501
Number of pages9
JournalJournal of Alloys and Compounds
Volume744
DOIs
StatePublished - 5 May 2018

Keywords

  • Ni-Co-Mn-Sn
  • melt spinning
  • giant magnetic entropy change
  • high-temperature martensitic transformation
  • magnetic hysteresis loss

EGS Disciplines

  • Materials Science and Engineering

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