57Fe Mossbauer study of L10 ordering in 57Fe/Pt multilayers

被引：21

作者：

Reddy, VR ^{[1
]}

Kavita, S ^{[1
]}

Gupta, A ^{[1
]}

机构：

[1] UGC, DAE Consortium Sci Res, Indore 452017, India

来源：

JOURNAL OF APPLIED PHYSICS | 2006年 / 99卷 / 11期

关键词：

D O I：

10.1063/1.2200594

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic and structural properties of equiatomic FePt alloy obtained from the thermal annealing of [Fe-57(19 A)/Pt(25 A)](x10) multilayer have been studied as a function of vacuum annealing at different temperatures. The multilayers are prepared by ion beam sputtering. X-ray reflectivity (XRR), x-ray diffraction (XRD), magneto-optical Kerr effect, and conversion electron Mossbauer spectroscopy are used to characterize the as-deposited and annealed multilayers. Using XRR it is observed that due to intermixing FePt alloy formation takes place with annealing. The XRD indicated the presence of superstructure peaks due to fct FePt phase at 350 degrees C and above. Mossbauer measurements indicated a clear evidence for the strong exchange coupling between the soft fcc FePt and hard fct FePt phases. The results indicate that the multilayer structure does not transform directly to the ordered fct FePt, rather first a fcc FePt phase is formed and subsequently it gets converted into the fct FePt phase as a function of annealing. (c) 2006 American Institute of Physics.

引用

页数：4

共 17 条

[1] Comparative study of the structure and local magnetic order in bulk and ultrafine particles of fe-mn (32%-35%) and Fe3Pt [J].