Sökning: "Pierfrancesco Maltoni"

Hittade 2 avhandlingar innehållade orden Pierfrancesco Maltoni.

1. 1. Complex correlations between microstructure and magnetic behavior in hard nanomagnets : A study of the structural and magnetic properties of SrFe12O19 nanocrystallites

   Författare :Pierfrancesco Maltoni; Roland Mathieu; Martin Sahlberg; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; hexaferrites; nanoparticles hard-magnetic materials; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

   Sammanfattning : Magnetic materials at the nanoscale are of huge scientific and technological interest, as theirmagnetic properties display remarkably different behavior compared to bulk-size. Among na-nostructured materials, M-type hexaferrite SrFe12O19 (SFO) nanoparticles (NPs) has becomeextremely appealing as promising candidate material for the renewal of permanent magnets ap-plications. LÄS MER

3. 2. Design, Synthesis And Characterization Of Magnetic Ferrite Nanostructures : Toward Novel Permanent Magnets

   Författare :Pierfrancesco Maltoni; Roland Mathieu; Adrian Quesada; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanosystems; magnetic interactions; magnetism; ferrites; materials science; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

   Sammanfattning : Magnetic oxide nanoparticles (NPs) may interact with each-other for example via dipolar or superexchange interactions, depending whether they are in direct contact. These interparticle interactions yield both ferro- and/or antiferromagnetic coupling and modify the energy barrier of the magnetic particle, depending upon the strength of the coupling and orientation of the particles. LÄS MER