نهى.نانو
02-24-2011, 11:18 PM
Center of Research Excellence in Nanotechnology (CENT)
Presents a Seminar
On
Nanowire Spintronics: Understanding and Controlling Magnetization Behaviour
by
Dr. Del Atkinson
Research Fellow and Reader in Physics
Department of Physics, Durham University, Durham, Dh1 3LE, UK
at
11: a.m. Tuesday
26 Rabi I, 1432H
1st March, 2011
Building 4, Room 125
ABSTRACT
Nanomagnets are individual structures of ferromagnetic materials with dimensions ranging from a few manometers to hundreds of nanometers. Applications include hard disk drives, solid-state magnetic memory (MRAM) and sensors.
For elongated lithographically patterned ferromagnetic nanowires the magnetization switching is incoherent, involving the formation of single magnetic domain walls that propagate through the nanostructure to reverse the magnetization. Such nanowires and domain wall processes have been proposed for applications in novel spintronic devices for sensors and memory technologies.
The study of such nanowires presents an opportunity to understand the fundamental physical behaviour of individual domain walls and to develop this understanding for the control of the propagation and pinning of domain walls in nanowires for future applications.
We will discuss the control of nucleation, propagation and pinning of individual domain walls in nanowires driven by both magnetic field and spin-polarized current in conventional nickel-iron alloys and go on to describe new work to locally tailor magnetic properties for spintronic applications by focused ion beam irradiation of bi-layered magnetic systems.
We will describe the fabrication of nanowire structures, the measurement of single wire magnetization behaviour (using MOKE and magneto resistance) as a function of field and spin-polarised current and include micro magnetic interpretations of the behaviour. The discussion of ion-beam control of magnetic behaviour will include structural analysis from X-ray reflectivity (XRR) and depth resolved X-ray fluorescence (XRF) using synchrotron radiation, supported by Monte-Carlo (SRIM and TRIDYN) simulations to understand the structural compositional changes resulting from irradiation.
All are welcome
مصدر الخبر: البريد الإلكتروني من د. زين يماني مدير مركز التميز البحثي لتقنية النانو في جامعة الملك فهد للبترول والمعادن.
Presents a Seminar
On
Nanowire Spintronics: Understanding and Controlling Magnetization Behaviour
by
Dr. Del Atkinson
Research Fellow and Reader in Physics
Department of Physics, Durham University, Durham, Dh1 3LE, UK
at
11: a.m. Tuesday
26 Rabi I, 1432H
1st March, 2011
Building 4, Room 125
ABSTRACT
Nanomagnets are individual structures of ferromagnetic materials with dimensions ranging from a few manometers to hundreds of nanometers. Applications include hard disk drives, solid-state magnetic memory (MRAM) and sensors.
For elongated lithographically patterned ferromagnetic nanowires the magnetization switching is incoherent, involving the formation of single magnetic domain walls that propagate through the nanostructure to reverse the magnetization. Such nanowires and domain wall processes have been proposed for applications in novel spintronic devices for sensors and memory technologies.
The study of such nanowires presents an opportunity to understand the fundamental physical behaviour of individual domain walls and to develop this understanding for the control of the propagation and pinning of domain walls in nanowires for future applications.
We will discuss the control of nucleation, propagation and pinning of individual domain walls in nanowires driven by both magnetic field and spin-polarized current in conventional nickel-iron alloys and go on to describe new work to locally tailor magnetic properties for spintronic applications by focused ion beam irradiation of bi-layered magnetic systems.
We will describe the fabrication of nanowire structures, the measurement of single wire magnetization behaviour (using MOKE and magneto resistance) as a function of field and spin-polarised current and include micro magnetic interpretations of the behaviour. The discussion of ion-beam control of magnetic behaviour will include structural analysis from X-ray reflectivity (XRR) and depth resolved X-ray fluorescence (XRF) using synchrotron radiation, supported by Monte-Carlo (SRIM and TRIDYN) simulations to understand the structural compositional changes resulting from irradiation.
All are welcome
مصدر الخبر: البريد الإلكتروني من د. زين يماني مدير مركز التميز البحثي لتقنية النانو في جامعة الملك فهد للبترول والمعادن.