نتایج جستجو برای: xo4
تعداد نتایج: 263 فیلتر نتایج به سال:
We report a systematic study on the structural and magnetic properties of CoxFe3-xO4 magnetic nanoparticles with sizes between 5 to 25 nm, prepared by thermal decomposition of Fe(acac)3 and Co(acac)2. The large magneto-crystalline anisotropy of the synthesized particles resulted in high blocking temperatures (42K< TB< 345K for 5 < d < 13 nm) and large coercive fields (HC ≈ 1600 kA/m for T = 5 K...
Extraction of reliable bond distances and angles for Ca10(VxP1-xO4)6F2 apatites using standard Rietveld refinement with Cu Kalpha X-ray powder data was significantly impaired by large imprecision for the O-atom coordinates. An initial attempt to apply crystal-chemical Rietveld refinements to the same compounds was partly successful, and exposed the problematic determination of two oxygen-metal-...
The nanocrystalline Ni0.7Cu0.3AlxFe2-xO4 (x=0.00: 0.02: 0.10) is prepared through the sol-gel autocombustion route.Both XRD and Rietveld confirm single-phase cubic spinel structure of investigated materials.Other structural parameters refined by refinement analysis are corroborated to formation NPs.Leveraging a vibrating sample magnetometer (VSM) consequence Al3+ substitution on magnetic studie...
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