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

Valence Bond Theory02:42

Valence Bond Theory

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...
Colors and Magnetism03:02

Colors and Magnetism

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 eye.
Ferromagnetism01:31

Ferromagnetism

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...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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

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...
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...

You might also read

Related Articles

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

Sort by
Same author

Exchange Bias in Bulk <math><mrow><mi>α</mi> <mo>-</mo> <mtext>Fe</mtext> <mo>/</mo> <mi>γ</mi> <mo>-</mo> <msub><mrow><mtext>Fe</mtext></mrow> <mrow><mn>70</mn></mrow></msub> <msub><mrow><mtext>Mn</mtext></mrow> <mrow><mn>30</mn></mrow></msub></mrow></math> Nanocomposites for Permanent Magnet Applications.

ACS applied nano materials·2024
Same author

Toward inventory-based estimates of soil organic carbon in forests of the United States.

Ecological applications : a publication of the Ecological Society of America·2017
Same author

Modified electrical transport probe design for standard magnetometer.

The Review of scientific instruments·2012
Same author

A variable temperature (8-400 k) gas transfer cell for solid state spectroscopy.

Applied optics·2010
Same author

Infrared reflectance and optical constants of tektites.

Applied optics·2010
Same author

Solid state studies by means of Fourier transform spectroscopy.

Applied optics·2010
Same journal

Corrigendum: Shells of charge: a density functional theory for charged hard spheres (2016<i>J. Phys. Condens. Matter</i><b>28</b>244006).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Nuclear spin coherence properties of<sup>151</sup>Eu<sup>3+</sup>and<sup>153</sup>Eu<sup>3+</sup>in a Y<sub>2</sub>O<sub>3</sub>transparent ceramic.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Corrigendum: The Hubbard dimer: a density functional case study of a many-body problem (2015<i>J. Phys.: Condens. Matter</i><b>27</b>393001).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Antibonding-induced counterintuitive thermal transport behavior: A first-principles study of quaternary compounds BaCdXF(X=As,P,Sb).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Topological properties of curved spacetime extended Su-Schrieffer-Heeger model.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Influence of lattice expansion on Cr ferromagnetism in Ce<sub>(1-x)</sub>La<sub>(x)</sub>CrGe<sub>3</sub>compounds revealed by atomic-scale measurements.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
See all related articles

Related Experiment Video

Updated: Jun 4, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

Efficient spin transfer phenomena in Fe/MgO/GaAs structure.

Y J Park1, M C Hickey, M J Van Veenhuizen

  • 1Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. smlyjpark@yahoo.com

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|March 2, 2011
PubMed
Summary
This summary is machine-generated.

Spin transfer efficiency reached 35% in Fe/MgO/GaAs structures due to dominant tunneling. Spin-dependent photocurrent measurements revealed efficient spin-polarized charge transfer, crucial for spintronic devices.

More Related Videos

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

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

Related Experiment Videos

Last Updated: Jun 4, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

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

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

Area of Science:

  • Spintronics
  • Solid-state physics
  • Materials science

Background:

  • Spin-polarized charge transfer is key for spintronic devices.
  • Fe/MgO/GaAs heterostructures are promising for spin manipulation.
  • Understanding transport mechanisms is crucial for device efficiency.

Purpose of the Study:

  • Investigate spin polarized charge transfer efficiency in Fe/MgO tunnel barrier/GaAs structures.
  • Analyze the influence of transport mechanisms on spin transfer.
  • Quantify spin transfer efficiency under photovoltaic operation.

Main Methods:

  • Utilized spin dependent photocurrent measurements.
  • Generated spin imbalance in GaAs using circularly polarized light.
  • Analyzed device behavior under photovoltaic mode and varying bias.

Main Results:

  • Achieved a high spin transfer efficiency of 35%.
  • Demonstrated the dominance of tunneling transport over Schottky emission.
  • Identified spin dependent tunneling conductance through phase change observations.
  • Observed prevalence of spin-polarized electron transport over unpolarized carriers.

Conclusions:

  • Tunneling transport dominates in Fe/MgO/GaAs structures, enabling high spin transfer efficiency.
  • Spin-dependent tunneling conductance is a key indicator of spin-polarized electron transport.
  • The findings are significant for developing efficient spintronic devices.