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

3.6K
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...
3.6K
Valence Bond Theory02:42

Valence Bond Theory

11.7K
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...
11.7K
Paramagnetism01:30

Paramagnetism

3.2K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
3.2K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

31.9K
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...
31.9K
Colors and Magnetism03:02

Colors and Magnetism

14.7K
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...
14.7K
Diamagnetism01:26

Diamagnetism

3.5K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
3.5K

You might also read

Related Articles

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

Sort by
Same author

Low-Dimensional VS<sub>3</sub> Synthesized at Elevated Pressure.

Inorganic chemistry·2025
Same author

Zeeman Split Kramers Doublets in Spin-Supersolid Candidate Na_{2}BaCo(PO_{4})_{2}.

Physical review letters·2025
Same author

Synthesis, Crystal Structure, and Elementary Electrical Characterization of Quasi-One-Dimensional TiSe<sub>3</sub>.

Inorganic chemistry·2025
Same author

Continuum of quantum fluctuations in a three-dimensional <i>S</i> = 1 Heisenberg magnet.

Nature physics·2024
Same author

Homogeneous reduced moment in a gapful scalar chiral kagome antiferromagnet.

Physical review. B·2024
Same author

Large off-diagonal magnetoelectricity in a triangular Co<sup>2+</sup>-based collinear antiferromagnet.

Nature communications·2023

Related Experiment Video

Updated: Apr 7, 2026

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
08:43

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles

Published on: October 27, 2018

19.1K

NaSrCo2F7, a Co(2+) pyrochlore antiferromagnet.

J W Krizan1, R J Cava

  • 1Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|July 9, 2015
PubMed
Summary

We synthesized a new cobalt pyrochlore, NaSrCo2F7, exhibiting strong antiferromagnetic interactions and geometric frustration. This material serves as a model for frustrated pyrochlore antiferromagnets with potential applications in magnetism research.

More Related Videos

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

9.0K
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

15.2K

Related Experiment Videos

Last Updated: Apr 7, 2026

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
08:43

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles

Published on: October 27, 2018

19.1K
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

9.0K
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

15.2K

Area of Science:

  • Solid State Chemistry
  • Magnetism and Magnetic Materials
  • Crystal Growth

Background:

  • Pyrochlore materials are known for their complex magnetic properties.
  • Geometric frustration in magnetic lattices can lead to exotic phenomena.
  • Cobalt-based compounds offer rich magnetic behaviors.

Purpose of the Study:

  • To synthesize and characterize a novel cobalt-based pyrochlore, NaSrCo2F7.
  • To investigate the magnetic properties and understand the magnetic interactions within the pyrochlore structure.
  • To explore the degree of geometric frustration in the synthesized material.

Main Methods:

  • Single-crystal growth using the Bridgeman-Stockbarger method.
  • Single-crystal structure determination.
  • Magnetic property measurements including AC susceptibility, DC susceptibility, and heat capacity.

Main Results:

  • NaSrCo2F7 was successfully synthesized with disordered Na/Sr on A sites and magnetic Co(2+) on B sites.
  • The compound exhibits strong antiferromagnetic interactions and a large effective moment.
  • No spin freezing was observed above 3 K, indicating significant geometric frustration.

Conclusions:

  • NaSrCo2F7 is identified as a geometrically frustrated antiferromagnet with a high frustration index.
  • The material serves as an example of frustrated pyrochlore antiferromagnets, potentially influenced by weak bond disorder.
  • Further studies on related materials like NaCaCo2F7 can provide deeper insights into these systems.