Diamagnetism

I want to introduct something about Connector Terminal. Country of Origin: China (mainland) Brand Name: AIRIC Primary Competitive Advantages: "Green" Product International Approvals Military Specifications Packaging Price Product Features Product Performance Prompt Delivery Quality Approvals Reputation Service Small Orders Accepted Main Export Markets: Eastern Europe North America Mid East/Africa Central/South America Asia Western Europe Australasia Connector Terminal RHT22-16 Series Heat Shrink Ring Terminal with 22 to 16AWG Request Sample View basket Specifications Key Specifications/Special Features: Maximum current: 22 to 16AWG 19A; 16 to 14AWG 27A; 12 to 10AWG 48A Maximum voltage: 600V Shrink temperature: 150C Operation temperature: -10C-+150C Insulated part material: PE Insulated part color: 22 to 16AWG red; 16 to 14AWG blue; 12 to 10A.WG yellow Metal part material:
(Redirected from Diamagnetic)

Levitating pyrolytic carbon
Diamagnetism is the property of an object which causes it to create a magnetic field in opposition of an externally applied magnetic field, thus causing a repulsive effect. Specifically, an external magnetic field alters the orbital velocity of electrons around their nuclei, thus changing the magnetic dipole moment in the direction opposing the external field.
Consequently, diamagnetism is a form of magnetism that is only exhibited by a substance in the presence of an externally applied magnetic field. It is generally a quite weak effect in most materials, although superconductors exhibit a strong effect.
Contents
1 Diamagnetic properties of materials
2 History
3 Demonstrations of diamagnetism
3.1 Curving water surfaces
3.2 Diamagnetic levitation
4 References
5 External links
//
Diamagnetic properties of materials
Diamagnetism in common materials
Material
?m=Km-1 x 10-5
Bismuth
-16.6
Carbon (diamond)
-2.1
Carbon (graphite)
-1.6
Copper
-1.0
Lead
-1.8
Mercury
-2.9
Silver
-2.6
Water
-0.91
All materials show a diamagnetic response in an applied magnetic field. In fact, diamagnetism is a very general phenomenon, because all paired electrons, including the core electrons of an atom, will always make a weak diamagnetic contribution to the material's response. However, for materials that show some other form of magnetism (such as ferromagnetism or paramagnetism), the diamagnetism is completely overpowered. Substances that mostly display diamagnetic behaviour are termed diamagnetic materials, or diamagnets. Materials that are said to be diamagnetic are those that are usually considered by non-physicists to be "non-magnetic", and include water, wood, most organic compounds such as petroleum and some plastics, and many metals including copper, particularly the heavy ones with many core electrons, such as mercury, gold and bismuth.
Diamagnetic materials have a relative magnetic permeability that is less than 1, thus a magnetic susceptibility which is less than 0, and are therefore repelled by magnetic fields. However, since diamagnetism is such a weak property its effects are not observable in every-day life. For example, the magnetic susceptibility of diamagnets such as water is = ?9.0510?6. The most strongly diamagnetic material is bismuth, = ?1.6610?4 , although pyrolytic graphite may have a susceptibility of = ?4.0010?4 in one plane. Nevertheless these values are orders of magnitudes smaller than the magnetism exhibited by paramagnets and ferromagnets.
Superconductors may be considered to be perfect diamagnets ( = ?1), since they expel all fields from their interior due to the Meissner effect.
Additionally, all conductors exhibit an effective diamagnetism when they move through a magnetic field. The Lorentz force on electrons causes them to circulate around forming eddy currents. The eddy currents then produce an induced magnetic field which opposes the applied field, resisting the conductor's motion.
History
In 1778 S. J. Bergman was the first person to observe that bismuth and antimony were repelled by magnetic fields. However, the term "diamagnetism" was coined by Michael Faraday in September 1845, when he realized that all materials in nature possessed some form of diamagnetic response to an applied magnetic field.
Demonstrations of diamagnetism
Curving water surfaces
If a thin (under 0.5 cm) layer of water is placed on top of a powerful magnet (such as a supermagnet) then the field of the magnet repels the water. This causes a slight dimple in the water's surface that may be seen by its reflection.
Diamagnetic levitation

A live frog levitates inside a 32 mm diameter vertical bore of a Bitter solenoid in a magnetic field of about 16 teslas at the Nijmegen High Field Magnet Laboratory. Movie
Diamagnets may be levitated in stable equilibrium in a magnetic field, with no power consumption. Earnshaw's theorem seems to preclude the possibility of static magnetic levitation. However, Earnshaw's theorem only applies to objects with permanent moments m, such as ferromagnets, whose magnetic energy is given by m. Ferromagnets are attracted to field maxima, which do not exist in free space. Diamagnetism is an induced form of magnetism, thus the magnetic moment is proportional to the applied field B. This means that the magnetic energy of diamagnets is proportional to B2, the intensity of the magnetic field. Diamagnets are also attracted to field minima, and there can be a minimum in B2 in free space (in fact ). The important distinction is that the sign of the induced magnetization in a diamagnet opposes the applied field, hence the attraction to minima in the...(and so on) To get More information , you can visit some products about sell: jst connector, stainless steel connectors, . The Connector Terminal products should be show more here!