Introduction to Seminar Topic on Giant Magnetoresistance Effect:
In 1988 the giant magnetoresistance effect was discovered and it took almost around 10 years of hard research work to get the first fruits. As soon as this was discovered it helps in creating an unprecedented increase in the hard disk for storage capacity. Primary memory is the other location for application of this discovery. The seminar enables to know the details of this particular discovery and its effect on the industrial level. In order to get the relevancy of this foundation it is suffice to mention that this discovery lead to the Nobel prize award for physics in 2007. Modern hard disks consist of two different heads that is one for reading and another for writing.
The head that is used for writing is very simple and enables in magnetic field generation for the passing of electricity. The magnetic field generated is focused by the head and it helps to write the bit on the surface of the disk. The reading concept is completely reversed to that of the writing and it uses induction of electromagnetic field.
This technique was used earlier for hard disks but when the capacity for storage increased it became almost difficult to read from the surface of the disk. It is because of the interference from the neighboring bits in the magnetic field. In the seminar a discovery is presented that solve this problem and it is revolutionized by the industry of hard disk.
GMR head introduction in the year 1996 lead by IBM lead to the rapid areal density increase by almost 100% per year. The primary memory based on GMR shall be used for replacing volatile primary memories as well as non-volatile memories. The discovery of the effect has shown an effect on both the secondary and primary computer storage capacity. It can be considered that the discoverer was meant only for the memory of combatr.