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Tailoring Structure and Magnetic Characteristics in L10-FePt Nanoparticles via Ag Doping in Different Valence States

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FePt, FePtAg and FePt–AgCl nanoparticles (NPs) are synthesized using the sol–gel method. The effect of Ag in different valence states on the morphology, chemical ordering and magnetic properties of L10-FePt NPs are studied in length. The addition of Ag to FePt NPs results in a larger particle size and wider distribution. Magnetic measurement results show that the coercivity (Hc) of FePt NPs is significantly higher with the addition of Ag in comparison with that of pure FePt NPs. While Ag+ executes a negative impact on the magnetic performance of FePt NPs. The saturation magnetization (Ms) for the FePt, FePtAg and FePt–AgCl NPs are 15.6, 10.6 and 6.9 emu/g, respectively. The addition of non-magnetic Ag or AgCl to FePt dilutes the Ms value of the NPs. From X-ray diffraction analyses, we observe that the diffraction peaks become sharper and considerably increasing intensity when Ag or AgCl is added to the FePt sample.
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Keywords: DIFFERENT VALENCE STATES; FEPT NANOPARTICLES; MAGNETIC PROPERTIES; STRUCTURE

Document Type: Short Communication

Publication date: March 1, 2017

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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