The development of high spatial resolution and element sensitive magnetic characterization techniques to quantitatively measure magnetic parameters of individual nanoparticles (NPs) and deeply understand and tune their magnetic properties is a hot topic in nanomagnetism. Magnetic force microscopy (MFM), thanks to its high lateral resolution, appears as a promising technique for the magnetic characterization of single nano-sized materials although it is still limited by some drawbacks, especially by the presence of electrostatic artifacts. Recently, these limitations have been overcome by the development of a particular MFM based technique called controlled magnetization – MFM (CM-MFM) allowing, in principle, a quantifiable correlation between the measured magnetic signal and the magnetization of the object under investigation. Here we propose an experimental procedure, based on the use of CM-MFM technique, to measure the magnetization curve of single magnetic NPs individuating their saturation magnetization, magnetic field, and coercivity. We measured, for the first time, the magnetization curves of individual Fe3O4 nanoparticles with diameters in the range of 18–32 nm by using a MFM instrument. Results are in very good agreement with the quantitative data obtained by SQUID analysis on a macroscopic sample, showing the high potential of the technique in the field of nanomagnetometry.

Single nanoparticles magnetization curves by controlled tip magnetization magnetic force microscopy / Angeloni, Livia; Passeri, Daniele; Corsetti, Stella; Peddis, Davide; Mantovani, Diego; Rossi, Marco. - In: NANOSCALE. - ISSN 2040-3364. - STAMPA. - 9:45(2017), pp. 18000-18011. [10.1039/C7NR05742C]

Single nanoparticles magnetization curves by controlled tip magnetization magnetic force microscopy

Angeloni, Livia
Primo
;
Passeri, Daniele
Secondo
;
Rossi, Marco
Ultimo
2017

Abstract

The development of high spatial resolution and element sensitive magnetic characterization techniques to quantitatively measure magnetic parameters of individual nanoparticles (NPs) and deeply understand and tune their magnetic properties is a hot topic in nanomagnetism. Magnetic force microscopy (MFM), thanks to its high lateral resolution, appears as a promising technique for the magnetic characterization of single nano-sized materials although it is still limited by some drawbacks, especially by the presence of electrostatic artifacts. Recently, these limitations have been overcome by the development of a particular MFM based technique called controlled magnetization – MFM (CM-MFM) allowing, in principle, a quantifiable correlation between the measured magnetic signal and the magnetization of the object under investigation. Here we propose an experimental procedure, based on the use of CM-MFM technique, to measure the magnetization curve of single magnetic NPs individuating their saturation magnetization, magnetic field, and coercivity. We measured, for the first time, the magnetization curves of individual Fe3O4 nanoparticles with diameters in the range of 18–32 nm by using a MFM instrument. Results are in very good agreement with the quantitative data obtained by SQUID analysis on a macroscopic sample, showing the high potential of the technique in the field of nanomagnetometry.
2017
Magnetic properties, magnetic force microscopy, nanomagnetism, nanoparticle
01 Pubblicazione su rivista::01a Articolo in rivista
Single nanoparticles magnetization curves by controlled tip magnetization magnetic force microscopy / Angeloni, Livia; Passeri, Daniele; Corsetti, Stella; Peddis, Davide; Mantovani, Diego; Rossi, Marco. - In: NANOSCALE. - ISSN 2040-3364. - STAMPA. - 9:45(2017), pp. 18000-18011. [10.1039/C7NR05742C]
File allegati a questo prodotto
File Dimensione Formato  
Angeloni_Single_2017.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.95 MB
Formato Adobe PDF
2.95 MB Adobe PDF   Contatta l'autore
MFM_Angeloni_Isteresi_Nanoscale_SUBMITTED.pdf

accesso aperto

Tipologia: Documento in Pre-print (manoscritto inviato all'editore, precedente alla peer review)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 4.37 MB
Formato Adobe PDF
4.37 MB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1030527
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 23
social impact