arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1802.07511cond-mat.mtrl-sci
收藏

自旋涨落驱动Mn5Si3的逆磁热效应

Spin-fluctuations drive the inverse magnetocaloric effect in Mn5Si3

N. Biniskos, K. Schmalzl, S. Raymond, S. Petit, P. Steffens, J. Persson, T. Brueckel

摘要:

对反铁磁化合物Mn5Si3单晶进行了非弹性中子散射测量,以研究自旋动力学与磁热力学性质之间的关系。结果表明,在该化合物的两个稳定的反铁磁相中,高温相具有不寻常的磁激发谱,其中传播自旋波和扩散自旋涨落共存。此外,证明了Mn5Si3的逆磁热效应,即绝热磁化冷却,与场致自旋涨落有关。

英文摘要:

Inelastic neutron scattering measurements were performed on single crystals of the antiferromagnetic compound Mn5Si3 in order to investigate the relation between the spin dynamics and the magneto-thermodynamic properties. It is shown that among the two stable antiferromagnetic phases of this compound, the high temperature one has an unusual magnetic excitation spectrum where propagative spin-waves and diffuse spin-fluctuations coexist. Moreover, it is evidenced that the inverse magnetocaloric effect of Mn5Si3, the cooling by adiabatic magnetization, is associated with field induced spin-fluctuations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑