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首页> 外文期刊>Journal of Materials Science >Carbon deficiency-induced changes of structure and magnetism of Mn3SnC
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Carbon deficiency-induced changes of structure and magnetism of Mn3SnC

机译：碳缺乏诱导的MN3SNC结构和磁化变化

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摘要

Crystal structure, magnetoelastic coupling, magnetization and magnetocaloric effects of Mn3SnC0.94 and Mn3SnC0.81 were investigated. Temperature-dependent high-resolution X-ray diffraction measurements showed that a larger carbon deficiency of Mn3SnC0.81 reduces lattice distortions more significantly than it reduces the lattice parameter. Resonant ultrasound spectroscopy measurements showed that the larger carbon deficiency has no effect on the lattice stiffening across a ferromagnetic transition, whereas it reduces the lattice softening across a low-temperature transition. Magnetic measurements showed that the larger carbon deficiency doubles high-field magnetization and improves the refrigeration capacity. It is suggested that the larger carbon deficiency of Mn3SnC0.81 weakens antiferromagnetic interactions more significantly than it enhances ferromagnetic interactions. However, the magnetocaloric effect of each sample includes a contribution from the lattice entropy change, which is not sensitive to the carbon deficiency.
机译：研究了Mn3SNC0.94和MN3SNC0.81的晶体结构，磁力耦合，磁化和磁热效应。温度依赖性的高分辨率X射线衍射测量结果表明，MN3SNC0.81的较大碳缺损程度更大地减少了比减少晶格参数的更显扭曲。谐振超声波光谱测量结果表明，较大的碳缺损对铁磁转变的晶格加强没有影响，而它降低了在低温转变中的晶格软化。磁性测量表明，较大的碳缺损倍增高场磁化并提高了制冷能力。建议MN3SNC0.81的较大碳缺乏比其增强铁磁性相互作用更大地减弱了反铁磁相互作用。然而，每个样品的磁热效应包括从晶格熵变化的贡献，这对碳缺乏不敏感。

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