Ion-irradiation-assisted phase selection in single crystalline Fe7Pd3 ferromagnetic shape memory alloy thin films: from fcc to bcc along the Nishiyama-Wassermann path.

Ion-irradiation-assisted phase selection in single crystalline Fe7Pd3 ferromagnetic shape memory alloy thin films: from fcc to bcc along the Nishiyama-Wassermann path.
复制标题

单晶 Fe7Pd3 铁磁形状记忆合金薄膜中的离子辐照辅助相选择:沿着 Nishiyama-Wassermann 路径从 fcc 到 bcc

DOI:
10.1103/physrevlett.109.195704
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发表时间:
2012
影响因子:
8.6
通讯作者:
S.G. Mayr
S.G. Mayr
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
A. Arabi-Hashemi;S.G. Mayr

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当加工Fe-Pd铁磁形状记忆薄膜时,从应用的角度来看,所需相及其转变温度的选择构成了最大的挑战之一。在目前的贡献,我们表明,与1.8 MeVions的照射是实现这一目标的方法的选择:单堆叠的乙烯膜生长与分子束外延MgO(001)衬底上,随后用离子照射揭示了相变沿着整个相变路径,从面心立方奥氏体bcc马氏体。而对于fcc-fct相变,增加注量到和导致相变到bcc相。极图测量揭示了根据Nishiyama和Wassermann的fcc-bcc相变的取向关系。
When processing Fe-Pd ferromagnetic shape memory thin films, selection of the desired phases and their transformation temperatures constitutes one of the largest challenges from an application point of view. In the present contribution we demonstrate that irradiation with 1.8 MeVions is the method of choice to achieve this goal: Single crystallinethin films that are grown with molecular beam epitaxy on MgO (001) substrates and subsequently irradiated with ions reveal a phase transformation along the whole phase transformation path ranging from fcc austenite to bcc martensite. While fora fcc-fct phase transformation is observed, increasing the fluence toandleads to a phase transformation to the bcc phase. Pole figure measurements reveal an orientation relationship for the fcc-bcc phase transformation according to Nishiyama and Wassermann.
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