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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Structure and magnetic properties of magnetron-sputtered FePt/Au superlattice films
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Structure and magnetic properties of magnetron-sputtered FePt/Au superlattice films

机译：磁控溅射FePt / Au超晶格薄膜的结构和磁性

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摘要

Using dc magnetron sputtering, FePt/Au multilayer films were prepared, and the effects of Au thickness and annealing temperature on structure and magnetic properties of the FePt/Au films were investigated. The as-deposited FePt/Au multilayer films with a thicker Au layer show a superlattice structure. The interatomic layer spacing d((220)) in face centered cubic (fcc) FePt lattice increases with increase in Au thickness. Accordingly, the strain energy stored in the fcc FePt lattice increases. After annealing at 300 degrees C, ordered FePt films were obtained, and the in-plane and out-of-plane coercivities of the films were found to increase with the increase in the Au layer thickness. When the Au layer thickness is 3.5 nm, the in-plane and out-of-plane coercivities of the films can reach 2.08 kOe and 1.56 kOe, respectively. The strain energy stored in fcc FePt lattice is responsible for the lower temperature ordering of FePt phase. For the films annealed at high temperature, the thicker Au layer in the films restrained the ordering of the FePt phase, which leads to the decrease in the coercivities of the films with increasing Au thickness.
机译：利用直流磁控溅射制备了FePt / Au多层膜，研究了Au厚度和退火温度对FePt / Au膜结构和磁性的影响。具有较厚Au层的沉积的FePt / Au多层膜显示出超晶格结构。面心立方（fcc）FePt晶格中的原子间层间距d（（220））随着Au厚度的增加而增加。因此，存储在fcc FePt晶格中的应变能增加。在300℃下退火之后，获得有序的FePt膜，并且发现膜的面内和面外矫顽力随着Au层厚度的增加而增加。当Au层的厚度为3.5nm时，膜的面内和面外矫顽力可以分别达到2.08kOe和1.56kOe。存储在fcc FePt晶格中的应变能是FePt相较低温度排序的原因。对于在高温下退火的膜，膜中较厚的Au层限制了FePt相的有序性，这导致膜的矫顽力随Au厚度的增加而降低。

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