Large magnetic entropy change near room temperature in antipervoskite SnCMn3

Details Large magnetic entropy change near room temperature in antipervoskite SnCMn3 Large magnetic entropy change near room temperature in antipervoskite SnCMn3

2009-05-12

arxiv.org/abs/0905.1773v1

Europhys. Lett. 85 (2009) 47004

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 8 figures

Scientific paper

10.1209/0295-5075/85/47004

We report the observation of large magnetocaloric effect near room temperature in antipervoskite SnCMn3. The maximal magnetic entropy change at the first-order ferrimagnetic-paramagnetic transition temperature (TC 279 K) is about 80.69mJ/cm3 K and 133mJ/cm3 K under the magnetic field of 20 kOe and 48 kOe, respectively. These values are close to those of typical magnetocaloric materials. The large magnetocaloric effect is associated with the sharp change of lattice, resistivity and magnetization in the vicinity of TC. Through the measurements of Seebeck coefficient and normal Hall effect, the title system is found to undergo a reconstruction of electronic structure at TC. Considering its low-cost and innocuous raw materials, Mn-based antiperovskite compounds are suggested to be appropriate for pursuing new materials with larger magnetocaloric effect.

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