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Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
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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...
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Magnetic flux depends on three factors: the strength of the magnetic field, the area through which the field lines pass, and the field's orientation with respect to the surface area. If any of these quantities vary, a corresponding variation in magnetic flux occurs. If the area through which the magnetic field lines are passing changes, then the magnetic flux also changes. This change in the area can be of two types: the flux through the rectangular loop increases as it moves into the...
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Cross-Linking and Charging Molecular Magnetoelectronics.

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Researchers developed new molecular magnetoelectrics by integrating molecular magnetism and conductivity via cross-linking. This approach enables low-power, room-temperature control of magnetism in flexible electronic devices.

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Area of Science:

  • Materials Science
  • Molecular Electronics
  • Magnetism

Background:

  • Inorganic magnetoelectrics face challenges like interface sensitivity, high power requirements, and limited tunability.
  • Existing approaches often rely on solid-to-solid interfaces for voltage-controlled magnetism.

Purpose of the Study:

  • To develop a novel strategy for next-generation molecular magnetoelectrics.
  • To integrate molecular magnetism with electric conductivity using an in situ cross-linking method.

Main Methods:

  • Cross-linking of magnetic coordination networks with conducting chain building blocks.
  • Synthesis of flexible molecular-based magnetoelectronic materials.

Main Results:

  • Achieved a critical temperature up to 337 K.
  • Demonstrated room-temperature magnetism control using a low-power electric field.
  • Created versatile and efficient flexible molecular-based magnetoelectronics.

Conclusions:

  • In situ cross-linking of molecular interfaces is a viable strategy for coupling magnetism and conductivity.
  • This method offers a promising pathway for designing advanced molecular magnetoelectronics.
  • The developed materials show potential for low-power, flexible electronic applications.