Title: Unraveling Nanoscale Magnetic Ordering in Fe3O4 Nanoparticle Assemblies via X-rays

Journal Article · · Magnetochemistry

Understanding the correlations between magnetic nanoparticles is important for nanotechnologies, such as high-density magnetic recording and biomedical applications, where functionalized magnetic particles are used as contrast agents and for drug delivery. The ability to control the magnetic state of individual particles depends on the good knowledge of the magnetic correlations between particles when assembled. Inaccessible via standard magnetometry techniques, nanoscale magnetic ordering in self-assemblies of Fe3O4 nanoparticles is here unveiled via X-ray resonant magnetic scattering (XRMS). Measured throughout the magnetization process, the XRMS signal reveals size-dependent inter-particle magnetic correlations. Smaller (5 nm) particles show little magnetic correlations, even when packed close together, yielding to magnetic disorder in the absence of an external field, i.e., superparamagnetism. In contrast, larger (11 nm) particles tend to be more strongly correlated, yielding a mix of magnetic orders including ferromagnetic and anti-ferromagnetic orders. These magnetic correlations are present even when the particles are sparsely distributed.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
2372776
Journal Information:
Magnetochemistry, Journal Name: Magnetochemistry Journal Issue: 4 Vol. 4; ISSN 2312-7481; ISSN MAGNCZ
Publisher:
MDPI AGCopyright Statement
Country of Publication:
Switzerland
Language:
English

References (49)

A New Route to Fabricate Monolayers of Magnetite Nanoparticles on Silicon journal April 2005
Applications of Nanoparticles in Biology journal November 2008
Chemical Design of Nanoparticle Probes for High‐Performance Magnetic Resonance Imaging journal June 2008
Biocompatible magnetite nanoparticles with varying silica‐coating layer for use in biomedicine: Physicochemical and magnetic properties, and cellular compatibility journal March 2012
On the Crystallographic and Magnetic Structures of Nearly Stoichiometric Iron Monoxide journal June 1996
Characterization of a natural magnetite journal June 2003
Probing complex materials with coherent soft X-rays journal May 2008
Field study of nanoparticles by small angle neutron scattering journal February 1995
Models for the dynamics of interacting magnetic nanoparticles journal May 1998
Small angle neutron scattering study of disordered and crystalline iron nanoparticle assemblies journal August 2006
Self-Assembled Layering of Magnetic Nanoparticles in a Ferrofluid on Silicon Surfaces journal January 2018
Magnetic Assembly of Superparamagnetic Iron Oxide Nanoparticle Clusters into Nanochains and Nanobundles journal September 2015
Preparation and Characterization of Monodisperse Fe3O4 Nanoparticles: An Electron Magnetic Resonance Study journal May 2011
Monodisperse MFe 2 O 4 (M = Fe, Co, Mn) Nanoparticles journal January 2004
Highly Ordered Self-Assembly with Large Area of Fe3O4 Nanoparticles and the Magnetic Properties journal November 2005
Controlled Synthesis of Iron Oxide Nanoparticles over a Wide Size Range journal December 2009
Functional Magnetic Nanoparticle Assemblies: Formation, Collective Behavior, and Future Directions journal August 2011
Shaping nanoscale magnetic domain memory in exchange-coupled ferromagnets by field cooling journal June 2016
Dipolar Magnetism in Ordered and Disordered Low-Dimensional Nanoparticle Assemblies journal February 2013
Lorentz microscopy sheds light on the role of dipolar interactions in magnetic hyperthermia journal January 2015
Magnetic nanoparticles: synthesis, functionalization, and applications in bioimaging and magnetic energy storage journal January 2009
Monte Carlo simulations of interacting magnetic nanoparticles journal May 2002
Static and dynamic magnetic properties of spherical magnetite nanoparticles journal September 2003
Spin disorder and magnetic anisotropy in Fe3O4 nanoparticles journal April 2006
Magnetic scattering of x rays (invited) journal April 1985
Dipolar ferromagnetic phase transition in Fe3O4 nanoparticle arrays observed by Lorentz microscopy and electron holography journal February 2011
Orbital and spin moments of 5 to 11 nm Fe 3 O 4 nanoparticles measured via x-ray magnetic circular dichroism journal May 2014
Dichroic coherent diffractive imaging journal August 2011
Applications of magnetic nanoparticles in biomedicine journal June 2003
Functionalisation of magnetic nanoparticles for applications in biomedicine journal June 2003
Progress in applications of magnetic nanoparticles in biomedicine journal November 2009
Magnetic particle hyperthermia: nanoparticle magnetism and materials development for cancer therapy journal September 2006
Structural and magnetic properties of uniform magnetite nanoparticles prepared by high temperature decomposition of organic precursors journal May 2006
Orbital domain dynamics in a doped manganite journal May 2008
Particle size effects on the magnetic behaviour of 5 to 11 nm Fe 3 O 4 nanoparticles coated with oleic acid journal June 2014
Size and surface effects in the magnetic properties of maghemite and magnetite coated nanoparticles
  • Ortega, D.; Vélez-Fort, E.; García, D. A.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 368, Issue 1927 https://doi.org/10.1098/rsta.2010.0172
journal September 2010
Soft-x-ray Faraday rotation at Fe L 2 , 3 edges journal April 1995
Magnetic correlations of fine ferromagnetic particles studied by small-angle neutron scattering journal March 1996
Soft-x-ray small-angle scattering as a sensitive probe of magnetic and charge heterogeneity journal July 2001
Soft-x-ray magnetic speckles from a nanostructured FePd wire journal November 2002
Interparticle magnetic correlations in dense Co nanoparticle assemblies journal January 2005
Magnetic moment of Fe 3 O 4 films with thicknesses near the unit-cell size journal October 2014
X-Ray Resonance Exchange Scattering journal September 1988
Spin and Orbital Magnetic Moments of Fe_{3}O_{4} journal August 2004
X-ray Resonant Exchange Scattering: Polariztaion Dependence and Correlation Function journal March 1996
Diffraction of X-rays by magnetic materials. II. Measurements on antiferromagnetic Fe 2 O 3 journal May 1981
The structure of magnetite journal April 1981
Self-assembly and magnetism in core-shell microspheres journal July 2003
Biocompatibility and Toxicity of Magnetic Nanoparticles in Regenerative Medicine journal January 2012

Similar Records

Modeling inter-particle magnetic correlations in magnetite nanoparticle assemblies using x-ray magnetic scattering data
Journal Article · 2019 · AIP Advances · OSTI ID:1528776

A Facile Solvothermal Synthesis of Octahedral Fe3O4 Nanoparticles
Journal Article · 2015 · Small, 11(22):2649-2653 · OSTI ID:1184942

Monodispersed core-shell Fe3O4@Au nanoparticles
Journal Article · 2005 · Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical · OSTI ID:876992

Related Subjects