1.1 Introduction
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1. Production of intense heat might make the electronic circuit inoperable;
2. In the limit of nanoscale dimensions, quantum effects come into play instead of
classical ones.
These restricted further size reductions of electronic component, such as transistors and others in electronic devices.
1.2 Comparative Merit–Demerit of Spintronics
and Electronics
First, let us try to figure out the following.
1.2.1 What Are the Disadvantages of Electronics?
• Consumption of high power.
• Higher degree dissipation of heat.
• Volatile electronic memory.
• Compactness is less, i.e., larger occupation of space on chip.
• Poor read and write speed because of inferior movement and controlling of
electron.
1.2.2 What Are then the Advantages of Spintronics Over
Electronics?
• One of the prime advantages of spintronics stems from the spontaneous magnetization of ferromagnetic material by virtue of which ferromagnets tend to remain
magnetized even after the withdrawal of any external magnetic field. This, in fact,
created sparking interest in the computer hardware industry for the replacement
of semiconductor-based components in computer hardware by the magnetic ones.
Such effort initiated with the transformation of random access memory (RAM),
which in turn leads to the evolution of magnetic random access memory (MRAM).
MRAM is a non-volatile memory, like FLASH. Interestingly, MRAM does not
require any electric current to retain the information, already written in electron’s
spin. This means spins would not change when electrical power is turned off.
• Such all-magnetic RAM, i.e., MRAM-based computer could retain all the information put into it. Significantly, when power is turned on, this special kind of
computer does not require any ‘boot-up waiting period’.
3
1. Production of intense heat might make the electronic circuit inoperable;
2. In the limit of nanoscale dimensions, quantum effects come into play instead of
classical ones.
These restricted further size reductions of electronic component, such as transistors and others in electronic devices.
1.2 Comparative Merit–Demerit of Spintronics
and Electronics
First, let us try to figure out the following.
1.2.1 What Are the Disadvantages of Electronics?
• Consumption of high power.
• Higher degree dissipation of heat.
• Volatile electronic memory.
• Compactness is less, i.e., larger occupation of space on chip.
• Poor read and write speed because of inferior movement and controlling of
electron.
1.2.2 What Are then the Advantages of Spintronics Over
Electronics?
• One of the prime advantages of spintronics stems from the spontaneous magnetization of ferromagnetic material by virtue of which ferromagnets tend to remain
magnetized even after the withdrawal of any external magnetic field. This, in fact,
created sparking interest in the computer hardware industry for the replacement
of semiconductor-based components in computer hardware by the magnetic ones.
Such effort initiated with the transformation of random access memory (RAM),
which in turn leads to the evolution of magnetic random access memory (MRAM).
MRAM is a non-volatile memory, like FLASH. Interestingly, MRAM does not
require any electric current to retain the information, already written in electron’s
spin. This means spins would not change when electrical power is turned off.
• Such all-magnetic RAM, i.e., MRAM-based computer could retain all the information put into it. Significantly, when power is turned on, this special kind of
computer does not require any ‘boot-up waiting period’.