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What materials are used to build a magnet?
Materials with high coercivity and high retentivity.
Why should the material used for making permanent magnets have high coercivity?
High coercivity in permanent magnets ensures that they can maintain their magnetization in the presence of external magnetic fields, making them stable and reliable for long-term use. This property also allows the magnetic material to resist demagnetization, ensuring that the magnet retains its magnetic properties over time.
How do you test for coercive?
the coercivity is test by drawing B-H curve.Coericivity is defined as without giving any magnitising force it will produce magnetic field intensity.
What is the difference between soft and hard magnets?
Soft magnets are easily magnetized and demagnetized, while hard magnets retain their magnetism once magnetized. Soft magnets have low coercivity and high permeability, making them suitable for applications like electromagnets. Hard magnets have high coercivity and are used in applications where a strong, lasting magnetic field is needed, such as in permanent magnets.
What are the types of ferrites?
Ferrites are divided into two main categories: soft ferrites and hard ferrites. Soft ferrites, such as manganese-zinc (MnZn) and nickel-zinc (NiZn) ferrites, have low coercivity and are used in high-frequency applications like transformers and inductors. Hard ferrites, like barium ferrite (BaFe12O19) and strontium ferrite (SrFe12O19), possess high coercivity and are typically used in permanent magnets. Additionally, ferrites can be classified based on their crystal structure, such as spinel, hexaferrite, and garnet types.
What has the author Urve Kangro written?
Urve Kangro has written: 'Divergence boundary conditions for vector helmholtz equations with divergence constraints' -- subject(s): Boundary conditions, Helmholtz equations, Coercivity, Boundary value problems, Divergence
What is used to make magnets?
A good permanent magnet should produce a high magnetic field with a low mass, and should be stable against the influences which would demagnetize it. The desirable properties of such magnets are typically stated in terms of the remanence and coercivity of the magnet materials.
What types of magnets are easy to magnetize but lose magnetism quickly?
Temporary magnets, such as soft iron and steel, are easy to magnetize but lose magnetism quickly because they have low coercivity. These types of magnets can be easily demagnetized by external factors such as heat or mechanical shock.
What is supermalloy?
Supermalloy is a metal alloy that is 79% nickel, 5% molybdenum and 16% iron. It is used in mechanical and electronic components like hard drives. It is disigned to have a very high magnetic permeability and a low coercivity, meaning that magnetic fields can flow though it very easily. It is also a soft magnetic material, meaning that it doesn't stay magnetized itself once the magnetic field is removed.
What are the properties and characteristics of the magnetic field of a neodymium magnet?
The magnetic field of a neodymium magnet is strong and permanent. It has a high magnetic strength and can attract other magnetic materials from a distance. Neodymium magnets are known for their durability and resistance to demagnetization. They have a high coercivity, meaning they are difficult to demagnetize once magnetized.
Will exposing a magnet to a DC magnetic field demagnetize it?
Exposing a magnet to a DC magnetic field typically won't demagnetize it unless the field is very strong and exceeds the coercivity of the magnet. In most cases, a DC magnetic field won't affect the magnet's strength but can alter its orientation or alignment.
What is thero-magnetic?
Thermo-magnetic refers to the interaction or effect of temperature on the magnetic properties of a material. Changes in temperature can influence the magnetic behavior of materials, causing variations in their magnetic properties such as magnetization, susceptibility, or coercivity. This effect is commonly observed in magnetic materials and is an important consideration in various applications such as magnetic storage devices and temperature sensors.
