Large magnetic entropy change near room temperature in antipervoskite SnCMn3

Abstract

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.

arXiv comment11 pages, 8 figures

References in corpus (1)

• On the thermoelectricity of correlated electrons in the zero-temperature limit

Cited by in corpus (16)

• Anomalous Hall Conductivity of a Non-Collinear Magnetic Antiperovskite
• Multifunctional Antiperovskites driven by Strong Magnetostructural Coupling
• Spin Model for Nontrivial Magnetic Orders in the Inverse-Perovskite Antiferromagnets
• Theory of Magnetism-Driven Negative Thermal Expansion in Inverse Perovskite Antiferromagnets
• Effect of local structural distortions on magnetostructural transformation in Mn${}_3$SnC
• The observation of a positive magnetoresistance and close correlation among lattice, spin and charge around TC in antipervoskite SnCMn3
• Effect of composition on magnetocaloric properties of Mn${}_3$Ga${}_{(1-x)}$Sn${}_x$C
• Synthesis of anti-perovskite-type carbides and nitrides from metal oxides and melamine
• Role of Tin and Carbon in the magnetic interactions in Mn${}_3$SnC
• Phase separated magnetic ground state in Mn${}_3$Ga${}_{0.45}$Sn${}_{0.55}$C
• Phase separation and effect of strain on magnetic properties of Mn${}_3$Ga${}_{1-x}$Sn${}_x$C
• Structural, elastic and electronic properties of Ir-based carbides-antiperovskites Ir3MC (M = Ti, Zr, Nb and Ta) as predicted from first-principles calculations
• Modulations in magnetostructural coupling in C and Sn deficient Mn${}_3$SnC
• $d$ band filling and magnetic phase separation in transition metal-doped Mn${}_3$SnC
• Identification of materials with strong magneto-structural coupling using computational high-throughput screening
• Absence of first order magnetic transition, a curious case of Mn3InC