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 Concept Videos

Ferromagnetism01:31

Ferromagnetism

2.5K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.5K
Colors and Magnetism03:02

Colors and Magnetism

12.5K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.5K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.3K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.3K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

1.5K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
1.5K
Valence Bond Theory02:42

Valence Bond Theory

9.8K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
9.8K

You might also read

Related Articles

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

Sort by
Same author

Role of <sup>57</sup>Fe Mössbauer spectrometry in evidencing the non-trivial effect of MnZn ferrite nanoparticle molecular dopamine coating.

Journal of colloid and interface science·2026
Same author

Tuning the Selectivity of Methanol Decomposition to Syngas Exploiting the Surface Stability of Ni<sub>3</sub>Sn<sub>2</sub> Intermetallic Compounds.

ACS applied energy materials·2026
Same author

Magnetically recoverable swellable magnetite/SOMS hybrid nanocomposites for rapid adsorption of organic dyes from water.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Magnetism of nanostructured hematite: from cultural heritage to fundamental properties.

Physical chemistry chemical physics : PCCP·2026
Same author

Upcycled materials for water treatment and emerging contaminant recovery: a preliminary study on waste-derived magnetic zeolites.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Interface-Induced Synaptic Performance in CeO<sub>2</sub>/La<sub>0.8</sub>Ba<sub>0.2</sub>MnO<sub>3</sub> Oxygen Reservoir Junction.

ACS applied materials & interfaces·2025

Related Experiment Video

Updated: Oct 11, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

8.6K

Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles.

Pierfrancesco Maltoni1, Sergey A Ivanov2,3, Gianni Barucca4

  • 1Department of Materials Science and Engineering, Uppsala University, Box 35, 751 03, Uppsala, Sweden. pierfrancesco.maltoni@angstrom.uu.se.

Scientific Reports
|December 3, 2021
PubMed
Summary

Strontium hexaferrite nanoparticles exhibit microstructure-dependent magnetic properties crucial for permanent magnets. Synthesis methods influence crystallite size and shape, impacting single-domain formation and magnetization reversal.

More Related Videos

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.4K
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

14.8K

Related Experiment Videos

Last Updated: Oct 11, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

8.6K
Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.4K
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

14.8K

Area of Science:

  • Materials Science
  • Solid State Physics
  • Nanotechnology

Background:

  • Magnetic properties of strontium hexaferrite (SrFe12O19) are critical for permanent magnet applications.
  • Microstructure significantly influences the magnetic behavior of hard hexaferrites.

Purpose of the Study:

  • To investigate the relationship between microstructure and magnetic properties of SrFe12O19 nanoparticles.
  • To elucidate the magnetization reversal mechanisms in these hard magnetic materials.

Main Methods:

  • Sol-gel self-combustion synthesis for nanoparticle production.
  • X-ray powder diffraction (XRPD) with G(L) line-profile analysis for structural characterization.
  • Transmission electron microscopy (TEM) for nanoparticle size determination.

Main Results:

  • Synthesis approach dictates crystallite size distribution, particularly along the [001] direction, favoring platelet-like structures.
  • TEM analysis confirmed nanoparticle size and estimated crystallite count per particle.
  • Single-domain state formation was observed below a critical size threshold.

Conclusions:

  • Microstructural control via synthesis is key to tailoring magnetic properties of SrFe12O19.
  • Understanding crystallite size and shape is essential for optimizing permanent magnet performance.
  • Activation volume analysis provides insights into magnetization reversal dynamics.