Magnetic Memory from Site Isolated Dy(III) on Silica Materials - Sorbonne Université Access content directly
Journal Articles ACS Central Science Year : 2017

Magnetic Memory from Site Isolated Dy(III) on Silica Materials


Achieving magnetic remanence at single isolated metal sites dispersed at the surface of a solid matrix has been envisioned as a key step toward information storage and processing in the smallest unit of matter. Here, we show that isolated Dy(III) sites distributed at the surface of silica nanoparticles, prepared with a simple and scalable two-step process, show magnetic remanence and display a hysteresis loop open at liquid 4 He temperature, in contrast to the molecular precursor which does not display any magnetic memory. This singular behavior is achieved through the controlled grafting of a tailored Dy(III) siloxide complex on partially dehydroxylated silica nanoparticles followed by thermal annealing. This approach allows control of the density and the structure of isolated, " bare " Dy(III) sites bound to the silica surface. During the process, all organic fragments are removed, leaving the surface as the sole ligand, promoting magnetic remanence.
Fichier principal
Vignette du fichier
magnetic.pdf (2.96 Mo) Télécharger le fichier
Origin : Publication funded by an institution

Dates and versions

hal-01480162 , version 1 (01-03-2017)





Florian Allouche, Giuseppe Lapadula, Georges Siddiqi, Wayne W. Lukens, Olivier Maury, et al.. Magnetic Memory from Site Isolated Dy(III) on Silica Materials. ACS Central Science, 2017, 3 (3), pp.244-249. ⟨10.1021/acscentsci.7b00035⟩. ⟨hal-01480162⟩
211 View
169 Download



Gmail Facebook X LinkedIn More