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Towards bi-magnetic...
Towards bi-magnetic nanocomposites as permanent magnets through the optimization of the synthesis and magnetic properties of SrFe12O19 nanocrystallites
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- Maltoni, Pierfrancesco (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Sarkar, Tapati (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Varvaro, Gaspare (författare)
- Ist Struttura Mat CNR, I-00015 Monterotondo, RM, Italy.
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- Barucca, Gianni (författare)
- Univ Politecn Marche, Dept SIMAU, Via Brecce Bianche, Ancona, Italy.
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- Ivanov, Sergey (författare)
- Uppsala universitet,Fasta tillståndets fysik,Moscow MV Lomonosov State Univ, Dept Chem, Leninskie Gory 1-3, Moscow 119991, Russia.
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- Peddis, Davide (författare)
- Ist Struttura Mat CNR, I-00015 Monterotondo, RM, Italy.;Univ Genoa, Dipartimento Chim & Chim Ind, Via Dodecaneso 31, I-16146 Genoa, Italy.
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- Mathieu, Roland (författare)
- Uppsala universitet,Fasta tillståndets fysik
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(creator_code:org_t)
- 2021-01-20
- 2021
- Engelska.
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Ingår i: Journal of Physics D. - : Institute of Physics Publishing (IOPP). - 0022-3727 .- 1361-6463. ; 54:12
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Sol-gel synthesis was used in order to obtain nanocrystallites of the SrFe12O19 (SFO) hexaferrite in an efficient and reliable way. By optimizing the initial synthetic conditions, we were able to control the size of the nanoparticles (NPs), at lower annealing temperature. The x-ray powder diffraction, transmission electron microscopy (TEM), and magnetic measurements have demonstrated a significant relation between the morphology, size, and magnetic properties of the nanoscale SFO, revealing a definite dependence on the crystallite size along the c-axis. The obtained NPs appear almost isotropic, in the form of platelets and exhibit similar magnetic performance, in terms of the energy product (BH)(MAX), thus, demonstrating the suitability of reducing the annealing temperature without any deterioration in the magnetic properties. Additionally, this work illustrates the feasibility of the sol-gel bottom-up approach to employ magnetic NPs as building-blocks for designing hard/soft exchange-coupled bi-magnetic nanocomposites, combining the high coercivity of a hard phase (SFO) and the high saturation magnetization of a soft phase (CoFe2O4); in this regard, we discuss the tunability of the magnetic anisotropy by symbiotically restricting the growth of both phases.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- ferrites
- nanocomposites
- permanent magnets
- sol-gel chemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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