Structural phase transformations in annealed Pt/Mn/Fe trilayers
Structural phase transformations in annealed Pt/Mn/Fe trilayers
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DOI：
10.1088/1361-648x/ab9269
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发表时间：
2020-05
期刊：
影响因子：
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通讯作者：
I. Kruhlov;O. Shamis;N. Schmidt;M. Karpets;Szilvia Gulyás;E. Hadjixenophontos;A. Burmak;Sergiy S Sidorenko;G. Katona;G. Schmitz;M. Albrecht;I. Vladymyrskyi
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文献类型：
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作者：
I. Kruhlov;O. Shamis;N. Schmidt;M. Karpets;Szilvia Gulyás;E. Hadjixenophontos;A. Burmak;Sergiy S Sidorenko;G. Katona;G. Schmitz;M. Albrecht;I. Vladymyrskyi
采用x射线衍射、透射电子显微镜、二次中性质谱深度谱、原子力显微镜和磁性能测量相结合的方法研究了Pt/Mn/Fe薄膜的热激活相变。后退火在真空中进行，温度最高可达620℃。最初，在280°C - 450°C之间，首先在Mn/Pt界面形成L10-MnPt，然后最有可能形成亚稳的bcc Fe3Pt，通过进一步退火转变为fcc Fe3Pt，最终转变为化学有序的L12-Fe3Pt。620℃退火后的最终产物由两个与自旋电子应用相关的有趣相组成，即添加Fe的反铁磁性L10-MnPt和铁磁性L12-Fe3Pt，与初始元素组成一致。
Thermally-activated phase transitions in Pt/Mn/Fe thin films were investigated by a combination of x-ray diffraction, transmission electron microscopy, secondary neutral mass spectrometry depth profiling, atomic force microscopy, and magnetic properties measurements. Post-annealing was carried out in vacuum to different temperatures up to 620 °C. Initially, at temperatures between 280 °C–450 °C first L10-MnPt is formed at the Mn/Pt interface followed by the most likely formation of metastable bcc Fe3Pt, which gets transformed by further annealing to fcc Fe3Pt and eventually to chemically ordered L12-Fe3Pt. The final product after annealing at 620 °C consists of two interesting phases, which are relevant for spintronic applications, antiferromagnetic L10-MnPt with addition of Fe and ferromagnetic L12-Fe3Pt, consistent with the initial element composition.