Structural and magnetic study of the MnAs magnetocaloric compound

Materials Research

Fabiana Cristina Nascimento¹  Adenilson Oliveira Dos Santos¹  Ariana De Campos¹  Sérgio Gama¹  Lisandro Pavie Cardoso¹ 

[1] ,Universidade Estadual de Campinas Instituto de Física Gleb Wataghin Campinas SP ,Brazil

关键词: MnAs intermetallic compound;    magnetocaloric effect;    structural phase transition;   

DOI  :  10.1590/S1516-14392006000100021

来源: SciELO

【 摘 要 】

The temperature induced phase transition in MnAs is analyzed in this work using X ray Rietveld refinement. The results show the presence of the hexagonal phase (P6(3)/mmc) at room temperature and the first-order structural-magnetic transition to the orthorhombic phase (Pnma) around 318 K was followed in detail. The MnAs magnetic characterization allowed to obtain the transition temperature and a maximum value of 47 J/(kg.K) for the measured magnetocaloric effect for a magnetic field variation of 5 T.

【 授权许可】

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