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Synthesis and characterization of permalloy nanostructured films by deposition of laser ablated nanoparticles |
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| Authors: | Chong Huang James Ma |
| Affiliation: | a Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA 22902, USA b Department of Semiconductor and Display Engineering, Hoseo University, Asan, Chungnam 336-795, South Korea c Department of System and Control Engineering, Hoseo University, Asan, Chungnam 336-795, South Korea d Materials Science and Engineering Program, University of Texas at Austin, Austin, TX 78712, USA e Department of Physics, University of Texas at Austin, Austin, TX 78712, USA f Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, TX 78712, USA g Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712, USA |
| Abstract: | A permalloy (Ni81Fe19; at%) microparticle (MP) aerosol was ablated to produce a nanoparticle (NP) aerosol that was then impacted at high velocity onto a substrate to produce porous thick films. The structure of the NPs was analyzed by transmission electron microscopy and the morphologies of the NPs and the nanostructured films were studied using high-resolution transmission electron microscopy and scanning electron microscopy. These analyses showed that the original composition and structure of the MPs were preserved in the NPs and films. The majority of NPs that were produced ranged in size between 2 and 15 nm with some larger particles present. Magnetization-temperature curves showed that the films consisted of a mixture of small superparamagnetic NPs and larger ferromagnetic NPs. A high saturation magnetization of 62.3 emu/g at 300 K was retained in the films indicating that they remained free of significant oxidation. |
| Keywords: | Laser ablation of microparticle aerosol Nanostructured film Ni81Fe19 Permalloy nanoparticle |
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