By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Magnetics have been published. According to news reporting originating from Metz, France, by VerticalNews correspondents, research stated, "Nanoparticle-FePt/Fe bilayer thin films with different Fe layer thicknesses and [nanoparticle-FePt/Fe](n) multilayer thin films with various periods were fabricated by DC magnetron sputtering. Their structures and magnetic properties (energy product and exchange coupling) were investigated by X-ray diffraction technique and vibrating sample magnetometer, respectively."
Our news editors obtained a quote from the research from the University of Lorraine, "The results show that coercivities of FePt/Fe bilayer films are dropped from 10.7 kOe to 0.53 kOe with increasing Fe soft magnetic layer thickness, due to the interconnecting of FePt nano-particles by Fe-rich soft magnetic phase and decreasing of the ordering degree of L1(0)-FePt phase. The critical Fe layer thickness changing the annealed film from granular to continuous microstructure is about 4 nm. For multilayer [FePt/Fe](n) films, both ordering degree of L1(0)-FePt phase and magnetic properties are improved with the number of layer periods. Moreover, a maximum energy products as high as 21.65 MGOe is obtained in the [FePt/Fe](5) multilayer film."
According to the news editors, the research concluded: "The enhancement of saturation magnetization and energy products can be ascribed to the high ordering degree of FePt phase as well as the strong exchange coupling among L1(0)-FePt hard magnetic phase and Fe-rich soft magnetic phase."
For more information on this research see: Structural and magnetic properties of L1(0)-FePt/Fe exchange coupled nano-composite thin films with high energy product. Journal of Magnetism and Magnetic Materials, 2013;345():165-170. Journal of Magnetism and Magnetic Materials can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Magnetism and Magnetic Materials - www.elsevier.com/wps/product/cws_home/505704)
The news editors report that additional information may be obtained by contacting J.S. Wang, Univ Lorraine, Lab Excellence Design Alloy Met Low mAss Struct D, F-57045 Metz, France. Additional authors for this research include B. Yang, W.L. Pei, G.W. Qin, Y.D. Zhang, C. Esling, X. Zhao and L. Zuo.
Keywords for this news article include: Metz, France, Europe, Magnetics
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