Tunable particle-agglomeration and magnetic coupling in bi-magnetic nanocomposites
Abstract
A set of non-stoichiometric Zn-Co-ferrite nanoparticles (NPs) was prepared by thermal decomposition of metallic complexes, in the presence of oleic acid, and, after a ligand-exchange process, was coated by a hydrophilic surfactant: these NPs were used as seeds in a sol-gel self-combustion synthesis to prepare nanocomposites (NCs) with a fixed weight ratio. Our focus here is the development of an efficient synthetic approach to control the magnetic coupling between a hard-magnetic matrix (Sr-ferrite) and NPs. The physico-chemical synthetic conditions (temperature, pH, colloidal stability) were optimized in order to tune their effect on the final particles' agglomeration in the matrix. We demonstrate that our synthetic approach is a novel way to produce strongly magnetically coupled NCs, where the final extrinsic properties could be tuned by controlling (i) the agglomeration of seeds in the matrix and (ii) their elemental doping.
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BibTeX
@article{maltoni2026tunable,
title = {{Tunable particle-agglomeration and magnetic coupling in bi-magnetic nanocomposites}},
author = {Pierfrancesco Maltoni and Miran Baričić and Gianni Barucca and Maria Chiara Spadaro and Jordi Arbiol and Nader Yaacoub and Davide Peddis and Roland Mathieu},
journal = {Physical Chemistry Chemical Physics},
year = {2026},
month = sep,
doi = {10.1039/d3cp03689h},
url = {https://hal.science/hal-05754175v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Tunable particle-agglomeration and magnetic coupling in bi-magnetic nanocomposites
AU - Pierfrancesco Maltoni
AU - Miran Baričić
AU - Gianni Barucca
AU - Maria Chiara Spadaro
AU - Jordi Arbiol
AU - Nader Yaacoub
AU - Davide Peddis
AU - Roland Mathieu
PY - 2026
DA - 2026/09/18
JO - Physical Chemistry Chemical Physics
DO - 10.1039/d3cp03689h
UR - https://hal.science/hal-05754175v1
AB - A set of non-stoichiometric Zn-Co-ferrite nanoparticles (NPs) was prepared by thermal decomposition of metallic complexes, in the presence of oleic acid, and, after a ligand-exchange process, was coated by a hydrophilic surfactant: these NPs were used as seeds in a sol-gel self-combustion synthesis to prepare nanocomposites (NCs) with a fixed weight ratio. Our focus here is the development of an efficient synthetic approach to control the magnetic coupling between a hard-magnetic matrix (Sr-ferrite) and NPs. The physico-chemical synthetic conditions (temperature, pH, colloidal stability) were optimized in order to tune their effect on the final particles' agglomeration in the matrix. We demonstrate that our synthetic approach is a novel way to produce strongly magnetically coupled NCs, where the final extrinsic properties could be tuned by controlling (i) the agglomeration of seeds in the matrix and (ii) their elemental doping.
SN - 1463-9076
SN - 1463-9084
ER -