Simultaneous enhancement of magnetic and mechanical properties in Ni-Mn-Sn alloy by Fe doping.
Simultaneous enhancement of magnetic and mechanical properties in Ni-Mn-Sn alloy by Fe doping.
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Fe 掺杂同时增强 Ni-Mn-Sn 合金的磁性能和机械性能
DOI：
10.1038/srep43387
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发表时间：
2017-02-23
影响因子：
4.6
通讯作者：
Cai W
中科院分区：
文献类型：
--
作者：
Tan C;Tai Z;Zhang K;Tian X;Cai W
磁场诱导逆马氏体相变(MFIRMT)和力学性能是影响Ni-Mn-Sn系磁性形状记忆合金应用的关键因素。在这里，我们证明了用Fe替代Ni可以同时提高Ni-Mn-Sn系合金的MFIRMT和力学性能，这有利于其应用。Ni44Fe6Mn39Sn11中的奥氏体具典型的铁磁性质，在223 K时饱和磁化强度最高可达69 /g。结果表明，适量的Fe替代确实能提高Ni50Mn39Sn11奥氏体中的铁磁性，这直接导致了磁感应强度的提高。同时，Fe掺杂显著提高了材料的力学性能。当加入4 at.%Fe时，压缩应变和最大应变达到最大值(分别为725.4 Mpa和9.3%)。此外，利用第一性原理计算，阐明了Fe掺杂对马氏体相变和磁性能的影响。
Both magnetic-field-induced reverse martensitic transformation (MFIRMT) and mechanical properties are crucial for application of Ni-Mn-Sn magnetic shape memory alloys. Here, we demonstrate that substitution of Fe for Ni can simultaneously enhance the MFIRMT and mechanical properties of Ni-Mn-Sn, which are advantageous for its applications. The austenite in Ni44Fe6Mn39Sn11shows the typical ferromagnetic magnetization with the highest saturation magnetization of 69 emu/g at 223 K. The result shows that an appropriate amount of Fe substitution can really enhance the ferromagnetism of Ni50Mn39Sn11alloy in austenite, which directly leads to the enhancement of MFIRMT. Meanwhile, the mechanical property significantly improves with Fe doping. When there is 4 at.% Fe added, the compressive and maximum strain reach the maximum value (approximately 725.4 MPa and 9.3%). Furthermore, using first-principles calculations, we clarify the origin of Fe doping on martensitic transformation and magnetic properties.