in this work we report synthesis and magnetic characterization of cobalt doped zno nanoparticles (with different percent of doped cobalt oxide). synthesis of the materials was carried out at room temperature by polyacrylamide-gel method, using zink sulfate and cobalt nitrate as source materials, acrylamide as monomer and n,n-methylene bisacrylamide as a lattice reagent. characterization of the ...

Spintronics is a rapidly emerging field of science and technology that will most likely have a significant impact on the future of all aspects of electronics as we continue to move into the 21st century. Conventional electronics are based on the charge of the electron. Attempts to use the other fundamental property of an electron, its spin, have given rise to a new, rapidly evolving field, know...

Electron spin attractsmuch attention as an alternative to the electron charge degree of freedom for low-power reprogrammable logic and non-volatile memory applications. Silicon appears to be the perfect material for spin-driven applications. Recent progress and challenges regarding spin-based devices are reviewed. An order of magnitude enhancement of the electron spin lifetime in silicon thin f...

Scanning Electron Microscopy with Polarization Analysis (SEMPA) provides high resolution (10 nm) magnetization images simultaneously with, but independent of, the topography. Such information is very useful in studying spintronics devices as illustrated by three examples: 1) exchange coupling of magnetic layers, 2) spin-transfer switching in magnetic nanowires, and 3) the ferromagnetic metal-se...

Spintronics is a new paradigm for electronics which utilizes the electron's spin in addition to its charge for device functionality. It is a rapidly emerging field of science and technology that will most likely have a significant impact on the future of all aspects of electronics as we continue to move into the 21st century. The primary areas for potential applications are information storage,...

ZnO is a very promising material for spintronics applications, with many groups reporting room-temperature ferromagnetism in films doped with transition metals during growth or by ion implantation. In films doped with Mn during pulsed laser deposition (PLD), we find an inverse correlation between magnetization and electron density as controlled by Sn-doping. The saturation magnetization and coe...

Spintronics, which manipulate spins but not electron charge, are highly valued as energy and thermal dissipationless systems. A variety of materials are challenging the realization of spintronic devices. Among those, graphene, a carbon mono-atomic layer, is very promising for efficient spin manipulation and the creation of a full spectrum of beyond-CMOS spin-based nano-devices. In the present a...

Y. Acremann, X. W. Yu, A. A. Tulapurkar, A. Scherz, V. Chembrolu, J. A. Katine, M. J. Carey, H. C. Siegmann, and J. Stöhr PULSE Institute, Stanford Linear Accelerator Center, Menlo Park, California 94025, USA Department of Applied Physics, Stanford University, Stanford, California 94305, USA Stanford Synchrotron Radiation Laboratory, Menlo Park, California 94025, USA Hitachi Global Storage Tech...

Silicon, the main material of microelectronics, is attractive for extending the functionality of MOSFETs by using the electron spin. However, spin lifetime decay in the siliconon-insulator transistor channel is a potential threat to spindriven devices using silicon. We predict a giant enhancement of the electron spin lifetime in silicon thin films by applying uniaxial mechanical stress. The adv...