Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Superparamagnetic spin dynamics studied using selective excitation double Mössbauer spectroscopy.

van Lierop J1, D H Ryan

  • 1Physics Department and Centre for the Physics of Materials, McGill University, 3600 University Street, Montreal, Quebec, Canada H3A 2T8.

Physical Review Letters
|September 27, 2000
PubMed
Summary

Researchers precisely measured spin dynamics in 6 nm Fe3O4 ferrofluid. Selective Excitation Double Mossbauer (SEDM) spectroscopy revealed superparamagnetic spin flips and energy transitions during relaxation.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Nutritional and lifestyle supportive care recommendations for management of obesity with GLP-1 - based therapies: An expert consensus statement using a modified Delphi approach.

Obesity pillars·2026
Same author

Weight and cardiometabolic effects of a novel oral shape-shifting superabsorbent hydrogel capsule: Prespecified and exploratory analysis of the Epitomee capsule RESET study.

Obesity pillars·2025
Same author

The magnetic structure and spin-reorientation of ErGa.

Acta crystallographica Section B, Structural science, crystal engineering and materials·2024
Same author

Magnetic crystalline-symmetry-protected axion electrodynamics and field-tunable unpinned Dirac cones in EuIn<sub>2</sub>As<sub>2</sub>.

Nature communications·2021
Same author

Efficacy and safety of an oral device to reduce food intake and promote weight loss.

Obesity science & practice·2018
Same author

Magnetic properties of Ln<sub>2</sub>CoGe<sub>4</sub>O<sub>12</sub> and LnBCoGe<sub>4</sub>O<sub>12</sub> (Ln = Gd, Tb, Dy, Ho, Er; B = Sc, Lu).

Dalton transactions (Cambridge, England : 2003)·2017

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Ferrofluids, like 6 nm Fe3O4 nanoparticles, exhibit complex magnetic behaviors.
  • Understanding spin dynamics is crucial for applications in data storage and biomedical fields.
  • Previous techniques struggled to differentiate static disorder from dynamic spin processes.

Purpose of the Study:

  • To precisely investigate spin dynamics in 6 nm Fe3O4 ferrofluid.
  • To differentiate static disorder, collective excitations, and moment reversals.
  • To observe and quantify superparamagnetic spin flips and relaxation processes.

Main Methods:

  • Utilized a substantially improved Selective Excitation Double Mossbauer (SEDM) experimental technique.
  • Analyzed the SEDM spectra to identify distinct contributions from different magnetic phenomena.

Related Experiment Videos

  • Measured spin flip frequencies at varying temperatures (70 K to 110 K).

    • Main Results:

    • Successfully separated static disorder, collective excitations, and moment reversals.
    • Observed superparamagnetic spin flips via an additional spectral line in SEDM.
    • Determined relaxation frequencies ranging from 2.5±0.3 MHz at 70 K to 9.7±1.0 MHz at 110 K.

    Conclusions:

    • SEDM is a powerful technique for probing dynamics in fine magnetic particle systems.
    • The study provides quantitative data on spin flip dynamics and relaxation in Fe3O4 ferrofluids.
    • Results offer insights into the blocking behavior and magnetic properties of nanomaterials.