Construction, Working Principle, Special features
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
It is a new technique which can store million bits of data in a single IC package. Magnetic bubble is a direct access storage medium.
Types, Construction, Working Principle, Advantages, Disadvantage
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
These disks are direct access storage devices. These disks are magnetically coated.There are two types of disks viz.
Working Principle, Advantages, Disadvantage
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
Magnetic tape is one of the most popular storage medium for data. The tape is a plastic ribbon with metal oxide material coated on one side which can be magnetised.
Classification, Examples
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
In general, memory units are the devices used to store the information (Input and output) in the forms of bits [ 8 bit = 1 Byte ].
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
Now a days, large number of informations are stored in (or) retrieved from the storage devices, by using the magnetic phenomena.
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
They are used to produce ultrasonics by magneto-striction principle.Ferrites are used in audio and video transformers [Ni-Zn ferrites]
Bohr Magneton
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
The orbital magnetic moment and the spin magnetic moment of an electron in an atom can be expressed in terms of smallest atomic unit of magnetic moment called Bohr magneton.
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
Ferrites are the magnetic compounds consisting of two or more different kinds of atoms.
Properties
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
It is a special case of magnetic material and it is composed of two sets of different transition metal ions having different values of magnetic moment with antiparallel alignment.
Properties, Antiferro-magnetic materials
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
Antiferromagnetism is a new type of magnetism in which the spins are aligned in antiparallel manner due to unfavourable exchange interaction among them, resulting in zero magnetic moment.
Magnetic Properties of Materials
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
Hard magnetic materials have high magnetisation, retentivity and coercivity. The shape of the hysterisis loop in the second quadrant gives the effectiveness of permanent magnetism in the specimen.
Subject and UNIT: Physics for Information Science: Unit III: Magnetic Properties of Materials
The materials which can be easily magnetised and demagnetised are called Soft magnetic materials