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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...
Atomic Nuclei: Nuclear Spin State Overview01:03

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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
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The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
Atomic Nuclei: Nuclear Relaxation Processes01:23

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Related Experiment Video

Updated: May 14, 2026

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
08:25

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene

Published on: July 3, 2015

Spin injection/detection using an organic-based magnetic semiconductor.

Jung-Woo Yoo, Chia-Yi Chen, H W Jang

    Nature Materials
    |July 20, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed an organic-based magnet for spintronics, functioning as an electron spin polarizer. This breakthrough advances hybrid magnetic tunnel junctions for next-generation electronics.

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    Published on: July 20, 2022

    Area of Science:

    • Spintronics and Materials Science
    • Organic Electronics
    • Magnetism

    Background:

    • Spintronics offers enhanced data storage and processing beyond conventional electronics.
    • Spin valves rely on magnetic layer spin alignment, controlled by external fields.
    • Developing room-temperature magnetic semiconductors is crucial for semiconductor spintronics.

    Discussion:

    • Organic-based magnets present tunable electronic and magnetic properties for spintronics.
    • This study demonstrates an organic magnet as an electron spin polarizer.
    • A hybrid magnetic tunnel junction was created using an organic semiconductor and a ferromagnetic oxide film.

    Key Insights:

    • The organic magnet, vanadium(TCNE)x, exhibits spin-polarizing behavior.
    • This material functions effectively as a spin injector and detector.
    • The device operates with a critical temperature (Tc) around 400 K.

    Outlook:

    • This work paves the way for novel organic spintronic devices.
    • Further research into molecular magnets could lead to advanced electronic functionalities.
    • Integration of organic materials in spintronics promises new applications.