Magnetic and Mössbauer studies of single‐crystal Fe16N2 and Fe‐N martensite films epitaxially grown by molecular beam epitaxy (invited)
Magnetic and Mössbauer studies of single‐crystal Fe16N2 and Fe‐N martensite films epitaxially grown by molecular beam epitaxy (invited)
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DOI：
10.1063/1.358157
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发表时间：
1994-11
影响因子：
3.2
通讯作者：
Y. Sugita;H. Takahashi;M. Komuro;K. Mitsuoka;A. Sakuma
中科院分区：
文献类型：
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作者：
Y. Sugita;H. Takahashi;M. Komuro;K. Mitsuoka;A. Sakuma
单相、单晶 Fe16N2(001) 薄膜和 Fe-11 at。通过在 N2 和 NH3 混合气体气氛中蒸发 Fe，然后进行退火，在 In0.2Ga0.8As(001) 衬底上外延生长了 200–900 A 厚度的%N 马氏体薄膜。使用振动样品磁力计测得 Fe16N2 和 Fe-N 马氏体薄膜的饱和磁化强度 4πMs 在室温下分别约为 29 和 24 kG，并且在上述厚度范围内几乎恒定。 Fe-N 马氏体薄膜的 4πMs 随着退火引起的 N 原子有序化而增加，最终 Fe16N2 达到 29 kG 左右。已经测量了这些薄膜的穆斯堡尔光谱。 Fe-N 马氏体薄膜的光谱是超精细场为 360、310 和 250 kOe 的叠加光谱，与之前报道的马氏体光谱相似。随着排序，光谱变得更简单，最终达到 Fe16N2 的 330 kOe 的单一超精细场。 Fe16N2（3.2 μB/Fe 原子）的 4πMs 为 29 kG，4πMs 为 24...
Single‐phase, single‐crystal Fe16N2(001) films and Fe‐11 at. %N martensite films of 200–900 A thickness have been epitaxially grown on In0.2Ga0.8As(001) substrates by evaporating Fe in an atmosphere of mixed gas of N2 and NH3, followed by annealing. The saturation magnetizations 4πMs’s for Fe16N2 and Fe‐N martensite films have been measured to be around 29 and 24 kG at room temperature, respectively, and almost constant in the above thickness range by using a vibrating sample magnetometer. 4πMs for Fe‐N martensite films has been increased with ordering of N atoms caused by annealing and finally reached around 29 kG for Fe16N2. Mossbauer spectra have been measured for those films. The spectrum for Fe‐N martensite films was a superposed one with hyperfine fields of 360, 310, and 250 kOe, similar to those previously reported for martensite. While the spectrum became simpler with ordering, finally reaching a single hyperfine field of 330 kOe for Fe16N2. 4πMs of 29 kG for Fe16N2 (3.2 μB/Fe atom) and 4πMs of 24...