IND_SEMINAR_D49..pptx its about spin a technician report

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1. Department of ECE SPINTRONICS Presented By: MALLULA SAITEJA (21EG104D49)

2. Department of ECE Introduction : • Spintronic , also known as spin electronics, is a field that focuses on manipulating and utilizing the intrinsic spin of electrons, in addition to their charge for electronic devices. • It explores the use of electron spin, in addition to charge, for information processing and storage, offering potential for faster, more energy-efficient devices . • Essentially, spintronics aims to revolutionize electronics by leveraging a fundamental property of electrons beyond just their charge.

3. Department of ECE SPINTRONICS :

4. Department of ECE SPINTRONICS : • Spintronic systems are most often realised in dilute magnetic semiconductors (DMS) and Heusler alloys. • Particular interest in the field of quantum computing. • In addition to charge state, electron spins are exploited as a further degree of freedom, with implications in the efficiency of data storage and transfer. • Information is stored (written) into spins as a particular spin orientation(up or down).

5. Department of ECE PRINCIPLE: • Utilizes the Bizarre property of spin of electron. • Intrinsic angular momentum is Spin. • Two arbitrary orientations and its magnitudes are ±h/2. • Directional and coherent motion of electron spin circulates a spin current, which will carry or transport information and control quantum spin in a spintronic device. • Superconductors can enhance central effects in spintronic such as magnetoresistance effects, spin lifetimes.

6. Department of ECE Why Spintronics ? Electronics Spintronics • Power Faliure Problem. • No Power Faliure. • "Boot Up" Waiting Problem. • No"Boot Up”Waiting. • More Power Consumption. • Less Power Consumption. • Less Compact, Normal Speed. • More Compact,Faster transfer • Cheaper. • Costlier.

7. Department of ECE APPLICATIONS: TMR – Tunnel Magnetoresistance. CPP-GMR - Current Perpendicular to Plane- Giant Magnetoresistance.

8. Department of ECE • Non-volatile spin-logic devices to enable scaling are being extensively studied. • Spin-transfer, torque-based logic devices that use spins and magnets for information processing have been proposed. • These devices are part of the ITRS exploratory road map. • For Storage media : Antiferromagnetic storage media have been studied as an alternative to ferromagnetism, especially since with antiferromagnetic material the bits can be stored as well as with ferromagnetic material.

9. Department of ECE SPINTRONICS DEVICES(LOGIC-BASED): • Logic-in memory applications are already in the development stage. • Read heads of magnetic hard drives are based on the GMR or TMR effect. • Tunnel magnetoresistance (TMR), where CPP transport is achieved by using quantum-mechanical tunneling of electrons through a thin insulator separating ferromagnetic layers. • Magnetic sensors can use the GMR effect.

10. Department of ECE SPINTRONICS DEVICES(METAL-BASED): • Spin-transfer torque, where a current of spin-polarized electrons is used to control the magnetization direction of ferromagnetic electrodes in the device. • Spin-wave logic devices carry information in the phase. Interference and spin-wave scattering can perform logic operations.

11. Department of ECE CONCLUSION: • Advantages of spintronic devices over the present electronic devices. • It replaces the present electronics era and provides high speed, huge size, compactness so on. • GMR is the base to switch from electronics to spintronics. • The magnetic field of the earth may affect the magnetic field inside the spin devices and cause errors.

12. Department of ECE REFERENCES: • https://en.wikipedia.org/wiki/Spintronics- Wikipedia. • Spintronics: A Spin-Based Electronics Vision for the Future- Sciencemag.org . • Wolf, S. A.; Chtchelkanova , A. Y.; Treger , D. M. (2006). "Spintronics-A retrospective and perspective". IBM Journal of Research and Development.

13. Department of ECE