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

3.5K
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...
3.5K
Magnetism01:30

Magnetism

9.9K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
9.9K
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

3.7K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
3.7K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.9K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.9K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

885
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
885
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.7K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.7K

You might also read

Related Articles

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

Sort by
Same author

Measurement of CP-violating asymmetries in B0 decays to CP eigenstates.

Physical review letters·2001
Same author

The placebo enigma in antidepressant clinical trials.

Journal of clinical psychopharmacology·2001
Same author

Defective stimulus-secretion coupling in islets of Psammomys obesus, an animal model for type 2 diabetes.

Diabetes·2001
Same author

Hyperglycemia contributes to impaired insulin response in GK rat islets.

Diabetes·2001
Same author

O2 dependence of K+ transport in sickle cells: the effect of different cell populations and the substituted benzaldehyde 12C79.

FASEB journal : official publication of the Federation of American Societies for Experimental Biology·2001
Same author

Weight gain with risperidone among patients with mental retardation: effect of calorie restriction.

The Journal of clinical psychiatry·2001

Related Experiment Video

Updated: Apr 4, 2026

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons
09:54

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

Published on: July 14, 2021

5.3K

Magneto-structural coupling in [Formula: see text].

A Khan1, H Kaneko2, H Suzuki2

  • 1Shahjalal University of Science and Technology, Sylhet, 3114 Bangladesh.

Springerplus
|September 11, 2015
PubMed
Summary
This summary is machine-generated.

Spin frustration in [Formula: see text] compounds leads to spin-Peierls-like and Jahn-Teller phase transitions. X-ray diffraction reveals crystal structure details, offering insights into magneto-elastic interactions.

Keywords:
Low temperature X-ray diffractionMagneto-structural couplingParticle size

More Related Videos

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.8K
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

3.5K

Related Experiment Videos

Last Updated: Apr 4, 2026

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons
09:54

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

Published on: July 14, 2021

5.3K
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.8K
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

3.5K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Solid State Chemistry

Background:

  • [Formula: see text] compounds exhibit spin frustration, influencing their magnetic and structural properties.
  • Spin-Peierls-like and Jahn-Teller transitions are key phenomena in understanding the behavior of these materials.

Purpose of the Study:

  • To investigate the crystal structures of [Formula: see text] compounds with varying 'x' values (0.8, 0.6, and 1).
  • To elucidate the interplay of magneto-elastic interactions, specifically Jahn-Teller and spin-Peierls-like interactions, in these systems.

Main Methods:

  • X-ray diffraction measurements were employed to determine the crystal structures.
  • Analysis of full width at half maximum and integrated intensity provided information on magneto-elastic interactions.

Main Results:

  • The crystal structures of the investigated [Formula: see text] compounds were successfully determined.
  • Structural distortions were observed, linked to phase transitions like spin-Peierls-like and Jahn-Teller transitions.
  • The data offers valuable insights into the nature and coexistence of magneto-elastic interactions.

Conclusions:

  • The study confirms the presence of coexisting Jahn-Teller and spin-Peierls-like interactions in the [Formula: see text] system.
  • X-ray diffraction is a powerful tool for probing magneto-elastic effects and crystal structure determination.
  • Understanding these interactions is crucial for designing materials with specific magnetic and electronic properties.