1.10 Applications
21
candidates for inclusion in future computers. Crocus and NEC are about to develop
logic-in memory applications.
1.11 Conclusions
In conclusion, solely spin or in combination with charge can be utilized to derive the
requisite functionality for information processing and storing digital information.
These are the fundamental issues of spintronics. Technology related to spintronics
has already revolutionized the information storing, i.e., storage density of hard drives
by the advent of GMR-based read head of magnetic hard disk drive. Consequently,
universal memory and low-power computation can potentially be realized in modern
technology.
Initial successes in this field include
• Development of GMR read heads to sense magnetic storage, i.e., magnetic hard
disk drive,
• Non-volatile magnetic random access memory (MRAM),
• Programmable spintronic logic devices,
• Rotational speed control system,
• Positioning control devices in robotics,
• Perimeter defence systems,
• Magnetometers, etc.
Implementation of spintronics in the field of information processing is a novel
attempt. This is motivated by the expectations that spintronics may offer a more
energy-efficient route in comparison to traditional transistor-based paradigm.
Recent research activities include
• Implementation and involvement of spintronics in the still growing field of
information technology, particularly for computing and signal processing.
• Spin-based quantum computers, which operate on the basis of reversible quantum
dynamics. As a result, such computers do not dissipate any energy at all to
complete a logic operation. Therefore, understanding the science and technology
of spintronics has become imperative for the students of basic science and
engineering disciplines.
1.12 Exercises
1. Define exchange splitting of 3d spin-up and spin-down bands in ferromagnet
with relevant band diagram.
2. What will happen to the outcoming beams, if the non-uniform magnetic field is
changed into uniform magnetic field in Stern–Gerlach experimental setup?
21
candidates for inclusion in future computers. Crocus and NEC are about to develop
logic-in memory applications.
1.11 Conclusions
In conclusion, solely spin or in combination with charge can be utilized to derive the
requisite functionality for information processing and storing digital information.
These are the fundamental issues of spintronics. Technology related to spintronics
has already revolutionized the information storing, i.e., storage density of hard drives
by the advent of GMR-based read head of magnetic hard disk drive. Consequently,
universal memory and low-power computation can potentially be realized in modern
technology.
Initial successes in this field include
• Development of GMR read heads to sense magnetic storage, i.e., magnetic hard
disk drive,
• Non-volatile magnetic random access memory (MRAM),
• Programmable spintronic logic devices,
• Rotational speed control system,
• Positioning control devices in robotics,
• Perimeter defence systems,
• Magnetometers, etc.
Implementation of spintronics in the field of information processing is a novel
attempt. This is motivated by the expectations that spintronics may offer a more
energy-efficient route in comparison to traditional transistor-based paradigm.
Recent research activities include
• Implementation and involvement of spintronics in the still growing field of
information technology, particularly for computing and signal processing.
• Spin-based quantum computers, which operate on the basis of reversible quantum
dynamics. As a result, such computers do not dissipate any energy at all to
complete a logic operation. Therefore, understanding the science and technology
of spintronics has become imperative for the students of basic science and
engineering disciplines.
1.12 Exercises
1. Define exchange splitting of 3d spin-up and spin-down bands in ferromagnet
with relevant band diagram.
2. What will happen to the outcoming beams, if the non-uniform magnetic field is
changed into uniform magnetic field in Stern–Gerlach experimental setup?