Author: Tim Rausch
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Experimental and Theoretical Investigation of Heat Assisted Magnetic Recording
Author: Tim Rausch
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Theoretical Investigation of New Magnetic Recording Media Using an Energy Landscape Method
Author: Ru Zhu
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 83
Book Description
Magnetic material has played an important role in the information storage technology. We have worked out a phase diagram showing spin torque switching for perpendicular anisotropy media at nonzero temperature. A new area is predicted where the system can vibrate between precessional and parallel states quickly and therefore creates "telegraph" noise region. The result was later confirmed by a nanopillar experiment. The density of magnetic recording is restricted by the superparamagnetic limit. To overcome this limit people have used perpendicular recording to replace the traditional longitudinal recording and are working on other approaches to get over the superparamagnetic limit including heat assisted recording, patterned media and exchange coupled media. Anisotropy graded media provides an alternative solution to achieve high areal density while keeping the writing field relatively low and good thermal stability. A two-dimensional energy landscape of the switching of anisotropy graded media is calculated to give an intuitive way of understanding the switching, as well as a way to quantitatively calculate the switching rate by mapping the problem onto a one-dimensional Langevin random walk. Then an iterative algorithm of for finding the saddle point of the energy landscape, which we call barbell algorithm, is used to locate the saddle point and the whole switching trajectory.
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 83
Book Description
Magnetic material has played an important role in the information storage technology. We have worked out a phase diagram showing spin torque switching for perpendicular anisotropy media at nonzero temperature. A new area is predicted where the system can vibrate between precessional and parallel states quickly and therefore creates "telegraph" noise region. The result was later confirmed by a nanopillar experiment. The density of magnetic recording is restricted by the superparamagnetic limit. To overcome this limit people have used perpendicular recording to replace the traditional longitudinal recording and are working on other approaches to get over the superparamagnetic limit including heat assisted recording, patterned media and exchange coupled media. Anisotropy graded media provides an alternative solution to achieve high areal density while keeping the writing field relatively low and good thermal stability. A two-dimensional energy landscape of the switching of anisotropy graded media is calculated to give an intuitive way of understanding the switching, as well as a way to quantitatively calculate the switching rate by mapping the problem onto a one-dimensional Langevin random walk. Then an iterative algorithm of for finding the saddle point of the energy landscape, which we call barbell algorithm, is used to locate the saddle point and the whole switching trajectory.
Fabrication and Optical Investigation of Heat Assisted Magnetic Recording Devices
Author: Yunchuan Kong
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The Physics of Ultra-High-Density Magnetic Recording
Author: M.L. Plumer
Publisher: Springer Science & Business Media
ISBN: 9783540423706
Category : Science
Languages : en
Pages : 376
Book Description
Application-oriented book on magnetic recording, focussing on the underlying physical mechanisms that play crucial roles in medium and transducer development for high areal density disk drives.
Publisher: Springer Science & Business Media
ISBN: 9783540423706
Category : Science
Languages : en
Pages : 376
Book Description
Application-oriented book on magnetic recording, focussing on the underlying physical mechanisms that play crucial roles in medium and transducer development for high areal density disk drives.
Experimental and Theoretical Studies of Particulate Tape Medium Noise in High-density Magnetic Recording Systems
Author: Peng Luo
Publisher:
ISBN:
Category : Electromagnetic noise
Languages : en
Pages : 504
Book Description
Publisher:
ISBN:
Category : Electromagnetic noise
Languages : en
Pages : 504
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Book Description
Head-disk Interface Study for Heat Assisted Magnetic Recording (HAMR) and Plasmonic Nanolithography for Patterned Media
Author: Shaomin Xiong
Publisher:
ISBN:
Category :
Languages : en
Pages : 184
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 184
Book Description
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 1006
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 1006
Book Description
Plasmonics and its Applications
Author: Grégory Barbillon
Publisher: MDPI
ISBN: 3038979147
Category : Technology & Engineering
Languages : en
Pages : 196
Book Description
Plasmonics is a rapidly developing field that combines fundamental research and applications ranging from areas such as physics to engineering, chemistry, biology, medicine, food sciences, and the environmental sciences. Plasmonics appeared in the 1950s with the discovery of surface plasmon polaritons. Plasmonics then went through a novel propulsion in the mid-1970s, when surface-enhanced Raman scattering was discovered. Nevertheless, it is in this last decade that a very significant explosion of plasmonics and its applications has occurred. Thus, this book provides a snapshot of the current advances in these various areas of plasmonics and its applications, such as engineering, sensing, surface-enhanced fluorescence, catalysis, and photovoltaic devices.
Publisher: MDPI
ISBN: 3038979147
Category : Technology & Engineering
Languages : en
Pages : 196
Book Description
Plasmonics is a rapidly developing field that combines fundamental research and applications ranging from areas such as physics to engineering, chemistry, biology, medicine, food sciences, and the environmental sciences. Plasmonics appeared in the 1950s with the discovery of surface plasmon polaritons. Plasmonics then went through a novel propulsion in the mid-1970s, when surface-enhanced Raman scattering was discovered. Nevertheless, it is in this last decade that a very significant explosion of plasmonics and its applications has occurred. Thus, this book provides a snapshot of the current advances in these various areas of plasmonics and its applications, such as engineering, sensing, surface-enhanced fluorescence, catalysis, and photovoltaic devices.
Nanomaterials for Spectroscopic Applications
Author: Kaushik Pal
Publisher: CRC Press
ISBN: 1000368270
Category : Technology & Engineering
Languages : en
Pages : 295
Book Description
This book provides an overview of key current developments in the synthetic strategy of functional novel nanomaterials in various spectroscopic characterizations and evaluations and highlights possible future applications in nanotechnology and materials science. It illustrates the wide-ranging interest in these areas and provides a background to the later chapters, which address the novel synthesis of high-yield nanomaterials and their biomaterials, graphene, polymeric nanomaterials, green nanomaterials, green polyester, liquid crystal electro-optic switching applications, nanobiotechnology, transition metal oxides, response characteristics of exclusive spectroscopic investigation as well as electron microscopic study, flexible and transparent electrodes, optoelectronics, nanoelectronics, smart displays, switchable device modulation, health care, energy storage, solar/fuel cells, environmental and plant biology, social, ethical, and regulatory implications of various aspects of green nanotechnology, as well as significant foreseeable spectroscopic applications of key functional nanomaterials. Given appropriate regulation for and research on the topics covered, commercial production of manufactured novel composite materials can be realized. Furthermore, the many discoveries highlighted in the book can modulate spectroscopic performances with technical excellence in multidisciplinary research of high competence.
Publisher: CRC Press
ISBN: 1000368270
Category : Technology & Engineering
Languages : en
Pages : 295
Book Description
This book provides an overview of key current developments in the synthetic strategy of functional novel nanomaterials in various spectroscopic characterizations and evaluations and highlights possible future applications in nanotechnology and materials science. It illustrates the wide-ranging interest in these areas and provides a background to the later chapters, which address the novel synthesis of high-yield nanomaterials and their biomaterials, graphene, polymeric nanomaterials, green nanomaterials, green polyester, liquid crystal electro-optic switching applications, nanobiotechnology, transition metal oxides, response characteristics of exclusive spectroscopic investigation as well as electron microscopic study, flexible and transparent electrodes, optoelectronics, nanoelectronics, smart displays, switchable device modulation, health care, energy storage, solar/fuel cells, environmental and plant biology, social, ethical, and regulatory implications of various aspects of green nanotechnology, as well as significant foreseeable spectroscopic applications of key functional nanomaterials. Given appropriate regulation for and research on the topics covered, commercial production of manufactured novel composite materials can be realized. Furthermore, the many discoveries highlighted in the book can modulate spectroscopic performances with technical excellence in multidisciplinary research of high competence.