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Related Concept Videos

Magnetic Fields01:27

Magnetic Fields

7.8K
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.
A magnetic field is defined by the force that a charged particle experiences...
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Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

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Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...
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Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

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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...
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Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

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Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
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Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

6.4K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
6.4K
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.8K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties
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Controllability of brushite structural parameters using an applied magnetic field.

V N Kuznetsov1, A A Yanovska1, A S Stanislavov2

  • 1Institute of Applied Physics, National Academy of Sciences of Ukraine, 58, Petropavlovskaya St., 40000 Sumy, Ukraine; Sumy State University, Ministry of Education and Science of Ukraine, 2, Rymskogo-Korsakova St., 40007 Sumy, Ukraine.

Materials Science & Engineering. C, Materials for Biological Applications
|December 27, 2015
PubMed
Summary

Low intensity static magnetic fields influence brushite structure, decreasing crystallite sizes without altering lattice parameters. This magnetic field effect offers control over material properties by modifying crystallization dynamics.

Keywords:
BrushiteCrystal structureMagnetic fieldParticle distributionTransmission electron microscopyX-ray diffraction

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Crystallography

Background:

  • Brushite (Dicalcium Phosphate Dihydrate - DCPD) is a precursor in biomineralization and biomaterials.
  • Controlling the structural and microstructural properties of DCPD is crucial for its applications.
  • The impact of external fields on crystalline material formation is an active area of research.

Purpose of the Study:

  • To investigate the influence of low intensity static magnetic fields on the structural and microstructural parameters of brushite.
  • To determine how magnetic field configuration and synthesis time affect DCPD properties.
  • To explore the potential for controlling DCPD characteristics using magnetic fields.

Main Methods:

  • X-ray diffraction (XRD) was employed to analyze structural parameters.
  • Transmission electron microscopy (TEM) was used for microstructural characterization.
  • Analysis of peak broadening and preferred orientation (Harris method) provided detailed insights.

Main Results:

  • Static magnetic fields primarily decrease crystallite sizes of DCPD, with no significant changes in crystal lattice parameters.
  • Specific crystallographic planes, (0 2 0) and (1 5 0), showed growth in crystallite sizes after 2 and 3 days of synthesis, respectively.
  • Reduced lattice microstrains were observed after 2 days of synthesis under magnetic field influence, alongside an effect resembling preferred orientation.

Conclusions:

  • Low intensity static magnetic fields can effectively modify the crystallite size and microstructural properties of brushite.
  • The observed effects are dependent on magnetic field configuration and synthesis duration, enabling tunable material properties.
  • This study demonstrates a method for controlling DCPD characteristics, potentially enhancing its utility in various applications.