Large reversible magnetostrain in polycrystalline Ni50Mn33In17-xGax
Large reversible magnetostrain in polycrystalline Ni50Mn33In17-xGax
复制标题
多晶 Ni50Mn33In17-xGax 中的大可逆磁致应变
DOI：
10.1016/j.jallcom.2016.04.249
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发表时间：
2016
影响因子：
6.2
通讯作者：
Yu SY
中科院分区：
文献类型：
--
作者：
Yu S. Y.;Gu A. J.;Kang S. S.;Hu S. J.;Li Z. C.;Ye S. T.;Li H. H.;Sun J. J.;Hao R. R.;Yu SY
研究了多晶Ni 50 Mn 33 In 17 −xGax（x = 4，5，7，8）的结构和马氏体相变的应变行为。所有样品在室温下均表现出bcc Heusler结构。在马氏体相变时，观察到平行于凝固方向的大的正相变应变和垂直于凝固方向的负相变应变。在70 kOe的磁场中，由于磁场诱导的逆马氏体相变的可逆磁应变的相同的值。在x = 4的样品中，沿这两个方向的最大值分别为-0.28%和0.49%沿着，远大于Co掺杂的NiMnIn多晶。随着Ga含量的增加，应变值略有下降。讨论了织构和各向异性对应变的影响。
The structure and strain behavior associated with martensitic transformation for polycrystalline Ni50Mn33In17−xGax(x = 4, 5, 7, 8) have been investigated. All samples show a bcc Heusler structure at room temperature. A large positive transformation strain parallel the solidification direction and negative strain perpendicular to this direction are observed upon martensitic transformation. The same value of reversible magnetostrain in a magnetic field of 70 kOe is found due to the magnetic field-induced reverse martensitic transformation. The largest value of −0.28% and 0.49% along this two directions were observed for x = 4 sample, which is much larger than that in Co-doped NiMnIn polycrystalline. The strain value shows a little decrease with increasing Ga content. Texture and anisotropy effect on the strain are discussed.