Heat Assisted Magnetic Recording for Areal Densities Beyond 1 Tbit/in2 PDF Download
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Author: Rabee Muhieddine Ikkawi
Publisher:
ISBN:
Category : Computer storage devices
Languages : en
Pages : 135
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Book Description
The magnetic recording industry is keeping up with the ultra high demand of high capacity hard drives by improving the areal recording densities of these devices. Such imposing advancement in utilization and performance is due to successive scaling in the geometrical dimensions of the device. This progression is truncated by the fundamental limit known as the superparamagnetic limit which occurs when bits of digital data are aggressively decreased that ambient heat demagnetizes them, leading to loss of the stored data.
Author: Rabee Muhieddine Ikkawi
Publisher:
ISBN:
Category : Computer storage devices
Languages : en
Pages : 135
Get Book Here
Book Description
The magnetic recording industry is keeping up with the ultra high demand of high capacity hard drives by improving the areal recording densities of these devices. Such imposing advancement in utilization and performance is due to successive scaling in the geometrical dimensions of the device. This progression is truncated by the fundamental limit known as the superparamagnetic limit which occurs when bits of digital data are aggressively decreased that ambient heat demagnetizes them, leading to loss of the stored data.
Author: Rabee Muhieddine Ikkawi
Publisher:
ISBN:
Category : Computer storage devices
Languages : en
Pages : 135
Get Book Here
Book Description
The magnetic recording industry is keeping up with the ultra high demand of high capacity hard drives by improving the areal recording densities of these devices. Such imposing advancement in utilization and performance is due to successive scaling in the geometrical dimensions of the device. This progression is truncated by the fundamental limit known as the superparamagnetic limit which occurs when bits of digital data are aggressively decreased that ambient heat demagnetizes them, leading to loss of the stored data.
Author: S. Krongelb
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 736
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Book Description
Author: Gaspare Varvaro
Publisher: CRC Press
ISBN: 9814669598
Category : Science
Languages : en
Pages : 528
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Book Description
Today magnetic recording is still the leading technology for mass data storage. Its dominant role is being reinforced by the success of cloud computing, which requires storing and managing huge amounts of data on a multitude of servers. Nonetheless, the hard-disk storage industry is presently at a crossroads as the current magnetic recording techno
Author: Ram K. Gupta
Publisher: CRC Press
ISBN: 1000640264
Category : Science
Languages : en
Pages : 480
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Book Description
A low-dimensional magnet is a key to the next generation of electronic devices. In some respects, low-dimensional magnets refer to nanomagnets (nanostructured magnets) or single-molecule magnets (molecular nanomagnets). They also include the group of magnetic nanoparticles, which have been widely used in biomedicine, technology, industries, and environmental remediation. Low-dimensional magnetic materials can be used effectively in the future in powerful computers (hard drives, magnetic random-access memory, ultra-low power consumption switches, etc.). The properties of these materials largely depend on the doping level, phase, defects, and morphology. This book covers various nanomagnets and magnetic materials. The basic concepts, various synthetic approaches, characterizations, and mathematical understanding of nanomaterials are provided. Some fundamental applications of 1D, 2D, and 3D materials are covered. This book provides the fundamentals of low-dimensional magnets along with synthesis, theories, structure-property relations, and applications of ferromagnetic nanomaterials. This book broadens our fundamental understanding of ferromagnetism and mechanisms for realization and advancement in devices with improved energy efficiency and high storage capacity.
Author: Jean-Yves Bigot
Publisher: Springer
ISBN: 3319077430
Category : Science
Languages : en
Pages : 361
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Book Description
This volume on Ultrafast Magnetism is a collection of articles presented at the international “Ultrafast Magnetization Conference” held at the Congress Center in Strasbourg, France, from October 28th to November 1st, 2013. This first conference, which is intended to be held every two years, received a wonderful attendance and gathered scientists from 27 countries in the field of Femtomagnetism, encompassing many theoretical and experimental research subjects related to the spins dynamics in bulk or nanostructured materials. The participants appreciated this unique opportunity for discussing new ideas and debating on various physical interpretations of the reported phenomena. The format of a single session with many oral contributions as well as extensive time for poster presentations allowed researchers to have a detailed overview of the field. Importantly, one could sense that, in addition to studying fundamental magnetic phenomena, ultrafast magnetism has entered in a phase where applied physics and engineering are playing an important role. Several devices are being proposed with exciting R&D perspectives in the near future, in particular for magnetic recording, time resolved magnetic imaging and spin polarized transport, therefore establishing connections between various aspects of modern magnetism. Simultaneously, the diversity of techniques and experimental configurations has flourished during the past years, employing in particular Xrays, visible, infra-red and terahertz radiations. It was also obvious that an important effort is being made for tracking the dynamics of spins and magnetic domains at the nanometer scale, opening the pathway to exciting future developments. The concerted efforts between theoretical and experimental approaches for explaining the dynamical behaviors of angular momentum and energy levels, on different classes of magnetic materials, are worth pointing out. Finally it was unanimously recognized that the quality of the scientific oral and poster presentations contributed to bring the conference to a very high international standard.
Author: Hartmut Zabel
Publisher: Springer
ISBN: 3642320422
Category : Science
Languages : en
Pages : 279
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Book Description
Nanomagnetism and spintronics is a rapidly expanding and increasingly important field of research with many applications already on the market and many more to be expected in the near future. This field started in the mid-1980s with the discovery of the GMR effect, recently awarded with the Nobel prize to Albert Fert and Peter Grünberg. The present volume covers the most important and most timely aspects of magnetic heterostructures, including spin torque effects, spin injection, spin transport, spin fluctuations, proximity effects, and electrical control of spin valves. The chapters are written by internationally recognized experts in their respective fields and provide an overview of the latest status.
Author: Zheng Cui
Publisher: Springer
ISBN: 3319393618
Category : Technology & Engineering
Languages : en
Pages : 442
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Book Description
This second edition of Nanofabrication is one of the most comprehensive introductions on nanofabrication technologies and processes. A practical guide and reference, this book introduces readers to all of the developed technologies that are capable of making structures below 100nm. The principle of each technology is introduced and illustrated with minimum mathematics involved. Also analyzed are the capabilities of each technology in making sub-100nm structures, and the limits of preventing a technology from going further down the dimensional scale. This book provides readers with a toolkit that will help with any of their nanofabrication challenges.
Author: Gayanath Fernando
Publisher: Elsevier
ISBN: 0080559689
Category : Technology & Engineering
Languages : en
Pages : 241
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Book Description
Thin Metallic multilayer films have become an important part in today's computer technology. The giant magnetoresistance (GMR) effect, which plays a central role here, was discovered in the late 1980s. This can be essentially described as the effect of a magnetic field on the electron transport leading to significant changes in the resistance. Other aspects of multilayers systems, such as stability, growth, confinement are also addressed. Theoretical and experimental methods used in such work are described in some detail, with special emphasis on density functional and spin density functional theories. Magnetic anisotropy in thin films is also discussed while addressing unresolved issues and new results from exchange-bias experiments. - Discusses the GMR effect - What makes multilayers interesting and useful? - What are the latest discoveries in this field? - Simple insights in to the physics behind multilayers - Novel concepts at small length scales - Theoretical and experimental background
Author: S. N. Piramanayagam
Publisher: John Wiley & Sons
ISBN: 0470501006
Category : Computers
Languages : en
Pages : 348
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Book Description
A timely text on the recent developments in data storage, from a materials perspective Ever-increasing amounts of data storage on hard disk have been made possible largely due to the immense technological advances in the field of data storage materials. Developments in Data Storage: Materials Perspective covers the recent progress and developments in recording technologies, including the emerging non-volatile memory, which could potentially become storage technologies of the future. Featuring contributions from experts around the globe, this book provides engineers and graduate students in materials science and electrical engineering a solid foundation for grasping the subject. The book begins with the basics of magnetism and recording technology, setting the stage for the following chapters on existing methods and related research topics. These chapters focus on perpendicular recording media to underscore the current trend of hard disk media; read sensors, with descriptions of their fundamental principles and challenges; and write head, which addresses the advanced concepts for writing data in magnetic recording. Two chapters are devoted to the highly challenging area in hard disk drives of tribology, which deals with reliability, corrosion, and wear-resistance of the head and media. Next, the book provides an overview of the emerging technologies, such as heat-assisted magnetic recording and bit-patterned media recording. Non-volatile memory has emerged as a promising alternative storage option for certain device applications; two chapters are dedicated to non-volatile memory technologies such as the phase-change and the magnetic random access memories. With a strong focus on the fundamentals along with an overview of research topics, Developments in Data Storage is an ideal reference for graduate students or beginners in the field of magnetic recording. It also serves as an invaluable reference for future storage technologies including non-volatile memories.
