Abstract The crystal structure, magnetic transitional behaviors and magnetocaloric effect were investigated in Nd6Fe13Pd compound. The results show that Nd6Fe13Pd crystallizes in the tetragonal Nd6Fe13Si-type structure (space group I4/mcm) with the lattice parameters a = b = 8.0765 A and c = 22.3747 A and two magnetic transitions from the ferromagnetic to the antiferromagnetic states with Ttr = 173 K and from the antiferromagnetic to the paramagnetic states with the Neel temperature of 369 K occurred in the Nd6Fe13Pd compound. The magnetic transition between the ferromagnetic and the antiferromagnetic states can be induced by either changing temperature or applying a magnetic field with very small thermal and magnetic hystereses and the transition temperature is very sensitive to the applied field. The experimental results indicate a broad working temperature span and negative magnetic entropy changes around Ttr = 173 K. For a magnetic field change of 2 T, the maximum magnetic entropy change −ΔSM reaches to 4.4 J kg−1 K−1 with the corresponding refrigeration capability of about 125 J kg−1.

中文翻译：

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Nd 6 Fe 13 Pd化合物的磁跃迁和磁热效应

摘要 研究了Nd6Fe13Pd化合物的晶体结构、磁跃迁行为和磁热效应。结果表明，Nd6Fe13Pd 以四方 Nd6Fe13Si 型结构（空间群 I4/mcm）结晶，晶格参数 a = b = 8.0765 A 和 c = 22.3747 A，Ttr = 173 从铁磁态到反铁磁态的两次磁跃迁Nd6Fe13Pd 化合物中发生 K 和从反铁磁性到顺磁性状态，Neel 温度为 369 K。铁磁态和反铁磁态之间的磁转变可以通过改变温度或施加具有非常小的热滞后和磁滞后的磁场来引起，并且转变温度对施加的场非常敏感。