What are the types of magnetic materials?
Types of Magnetic Materials
- Paramagnetic materials. The materials that are not strongly attracted to a magnet are known as paramagnetic material.
- Diamagnetic materials. The materials repelled by a magnet such as zinc.
- Ferromagnetic materials.
What is diamagnetic paramagnetic and ferromagnetic?
Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in the opposite direction, creating a repulsive force. Paramagnetic and ferromagnetic materials, on the other hand, are attracted to a magnetic field.
Are paramagnetic materials magnetic?
Paramagnetic materials include most chemical elements and some compounds; they have a relative magnetic permeability slightly greater than 1 (ie a small positive magnetic sensitivity) and are therefore attracted to magnetic fields.
What are the characteristics of ferromagnetism?
Ferromagnetic materials have a high, positive sensitivity to an external magnetic field. They have a strong attraction to magnetic fields and can retain their magnetic properties after the external field is removed.
When ferromagnetic substances are heated strongly, the magnetic moment?
Therefore, it is strongly attracted. When a ferromagnetic substance is heated above the Curie point, the domain is slightly perturbed, and therefore the direction of the domains no longer remains aligned with the magnetic field, resulting in reduced attractive force.
Which of the following substances loses ferromagnetism when heated and becomes paramagnetic?
Substances such as Fe3O4 and MgFe2O4 lose ferrimagnetism when heated and become paramagnetic.
Is znfe2o4 ferrimagnetic?
X-ray diffraction pattern of the ZnFe2O4 nanotubes annealed at 600°C. Below the blocking temperature, the ZFC and FC curves diverge significantly and the ZnFe2O4 nanotubes are in the ferrimagnetic state.
Why is ZnFe2O4 a normal spinel?
Since Zn2+ is d10, Fe3+ is d5 and O2− is a weak field ligand, the CFSE values of both the normal and inverse spinel structures should be 0.
Is Fe3O4 Ferromagnetic?
The magnetic interaction between iron ions at octahedral and tetrahedral sites is antiferromagnetic and that between octahedral ions is ferromagnetic; generally a ferrimagnetic arrangement of Fe3O4. Therefore, the net magnetic moment in Fe3O4 is due to Fe2+ ions (4 B).
What do you mean by antiferromagnetic arrangement?
In materials exhibiting antiferromagnetism, the magnetic moments of atoms or molecules, usually related to the spins of electrons, correspond in a regular pattern to neighboring spins (on different sub-lattices) pointing in opposite directions.