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Spintronics , also known as spinelectronics or fluxtronic, is an emerging technology exploiting both the intrinsicspin of the electron and its associated magnetic moment, in addition to its fundamental electronic charge, in solid-state devices.

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kosuri siva satyanarayana raju/BASIC PRINCIPLE OF SPINTRONICS

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kosuri siva satyanarayana raju/BASIC PRINCIPLE OF SPINTRONICS

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The word spintronics—

short for spin electronics—was coined in the 1990s to describe devices that take advantage of “spin,” a quantum-mechanical property of an electron that takes only two values: spin-up and spin-down. Spintronics research flowered following the discovery of the giant magnetoresistance (GMR) effect in the late 1980s. IBM Almaden Research Center researchers realized that GMR could be used to make more sensitive hard disk drive read heads.

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I read a article. this article is about applying spintronics in couplers.

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Gowtam/INTRODUCTION TO SPINTRONIC DEVICES. 

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Gowtam/INTRODUCTION TO SPINTRONIC DEVICES. 

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Introduction : Spintronics devices exploiting the spin of the electron [1-10] are prepared to revolutionise the electronics industry. The significance of this new generation device is faster memory and lower power consumption at low electron density.

The late 20th century has been considered as an era of microelectronics. However, the avalanche growth of microelectronics is a major threat to Moore’s law and spintronics may be a solution for it. From the first transistor to the signally powerful microprocessor in our recent computers, most electronic devices have employed circuits that express data as binary digits, or bits (1 and 0) represented by the existence or absence of electric charge. Unlike microelectronics, spintronics exploits spin (spin up ↑ and spin down ↓) of the electron to carry information between devices.

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roop sagar / Introduction about spintronic couplers

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roop sagar / Introduction about spintronic couplers

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A current in this coil, when combined with an on-chip GMR magnetic sensor separated by an insulating layer, can couple a signal across the insulator achieving galvanic isolation. Like the sensor, these components can be combined with other semiconductor functions to produce a very high-speed digital isolator.

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kosuri siva satyanarayana raju/INVENTION OF SPIN VALUE

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kosuri siva satyanarayana raju/INVENTION OF SPIN VALUE

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The invention of the spin valve
The first use of spin-valve sensors in hard disk drive read heads was in the IBM Deskstar 16GP Titan, which was released in 1997 with 16.8 GB of storage. In 2007, Hitachi, which bought IBM’s hard drive division in 2003, released the Deskstar 7K1000, the first 1 TB hard disk drive. Today, the Hitachi Deskstar 7K3000 provides up to 3 TB of storage

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we can build more state of the art spintronic devices with extraordinary properties. Extended research into application possibilities of any spintronic effects is therefore crucial to realise more advanced spintronic devices. These devices made huge impact on computer technology by enabling higher storage of information in hard drives and faster reading of data in random access memories.

The first successful application of MTJ was demonstrated in computer read head technology with Al2O3 barrier and MgO barrier MTJ. The magnetic recording density in hard disk drive increased (300-600 Gbit/Inch2) considerably in these devices [62-65]. Another application of MTJ is to develop magnetic random access memory (MRAM) devices. It has been claimed that MRAM can exceed the speed of SRAM (static RAM), density of DRAM (Dynamic RAM) and non-volatility of flash memory. In addition, the nano-dimension device has low power consumption and less heating. MRAM is an upgrade version of SRAM and DRAM where data is stored using spin instead of electrical charges. It overcomes one of the disadvantages of the conventional RAM, the loss of information by power failure.

Leading companies like IBM, Motorola, and Honeywell started the MRAM research in 1995 and they were supported by United States Defense Advanced Research Projects Agency (DARPA)

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roop sagar/application of spintronics in couplers

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roop sagar/application of spintronics in couplers

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Spintronics is a new field of research that studies and applies phenomenon that are dependent upon the spin of electrons.

Spin-dependent scattering of conduction electrons had been observed for some time, but the advent of improved thin-film vapor deposition systems resulted in the observations in

1988 of large magnetic field dependent changes in resistance of thin-film ferromagnetic/non-magnetic metallic multilayers. The change in resistance was much larger than previously observed changes in resistance due to magnetic field earning the phenomenon the name Giant Magnetoresistance (GMR). This discovery was closely followed in 1994 by the commercial introduction by NVE Corporation of magnetic sensors based on GMR materials. Intense research continues on a wide variety of new materials utilizing the phenomenon of spin-dependent conduction electron scattering as well as research understanding the phenomenon itself. Applications using GMR materials include magnetic field sensors, high-speed data couplers or isolators, and magnetic random access memory (MRAM).

The application of these to data couplers. It has been  argued that the largest application of nanotechnology to date is the use of GMR materials in read heads for  high-density magnetic data recording. The use of GMR read heads has allowed hard drives to reach recording densities of 100 GBy/in2 common today in laptop and desktop computers. We will discuss about couplers.

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kosuri siva satyanarayana raju/APPLICATIONS IN DATASTORAGE DEVICES

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kosuri siva satyanarayana raju/APPLICATIONS IN DATASTORAGE DEVICES

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INTRODUCTION: The discovery and application by IBM researcher Stuart Parkin and his colleagues of a “spin valve”—essentially the capability to alter the magnetic state of materials at the atomic level—changed the landscape of magnetic data storage by dramatically increasing storage capacity. This helped pave the way for some of today’s most popular devices and online applications.