English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  On the magnetic anisotropy and nuclear relaxivity effects of Co and Ni doping in iron oxide nanoparticles.

Orlando, T., Albino, M., Orsini, F., Innocenti, C., Basini, M., Arosio, P., et al. (2016). On the magnetic anisotropy and nuclear relaxivity effects of Co and Ni doping in iron oxide nanoparticles. Journal of Applied Physics, 119(13): 134301. doi:10.1063/1.4945026.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-529F-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-095A-8
Genre: Journal Article

Files

show Files
hide Files
:
2281396.pdf (Publisher version), 3MB
Name:
2281396.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Orlando, T.1, Author              
Albino, M., Author
Orsini, F., Author
Innocenti, C., Author
Basini, M., Author
Arosio, P., Author
Sangregorio, C., Author
Corti, M., Author
Lascialfari, A., Author
Affiliations:
1Research Group of Electron Paramagnetic Resonance, MPI for Biophysical Chemistry, Max Planck Society, ou_578606              

Content

show
hide
Free keywords: -
 Abstract: We report a systematic experimental study of the evolution of the magnetic and relaxometric properties as a function of metal (Co, Ni) doping in iron oxide nanoparticles. A set of five samples, having the same size and ranging from stoichiometric cobalt ferrite (CoFe2O4) to stoichiometric nickel ferrite (NiFe2O4) with intermediate doping steps, was ad hoc synthesized. Using both DC and AC susceptibility measurements, the evolution of the magnetic anisotropy depending on the doping is qualitatively discussed. In particular, we observed that the height of the magnetic anisotropy barrier is directly proportional to the amount of Co, while the Ni has an opposite effect. By Nuclear Magnetic Resonance Dispersion (NMR-D) experiments, the experimental longitudinal r(1) and transverse r(2) relaxivity profiles were obtained, and the heuristic theory of Roch et al. was used to analyze the data of both r(1) and, for the first time, r(2). While the experimental and fitting results obtained from r(1) profiles were satisfying and confirmed the anisotropy trend, the model applied to r(2) hardly explains the experimental findings.

Details

show
hide
Language(s): eng - English
 Dates: 2016-04-012016-04-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.4945026
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Applied Physics
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: 10 Volume / Issue: 119 (13) Sequence Number: 134301 Start / End Page: - Identifier: -