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Bruce Gurney
Bruce Alvin Gurney (8 July 1957 – 20 October 2023) was an American physicist responsible for pioneering advances in magnetic recording. In particular, he was central to the development of the giant magnetoresistance (GMR) sensors first used in hard disk drives in 1997. Education and career Bruce Gurney was born in Oregon, USA, but grew up and was educated in San Diego, California. He attended the Will C. Crawford High School. He received a B.S. in physics from Caltech in 1979 and an M.S. in physics from Cornell in 1982. He completed a Ph.D. at Cornell on surface science in 1987. In 1987, Gurney joined IBM in San Jose working on thin-film deposition and characterization. He was a coinventor on the original spin-valve (GMR) patent. In 1991, Gurney moved to the IBM Almaden Research Center where he oversaw the transfer of spin-valve technology into development and into manufacturing. Gurney continued to lead research efforts on advanced read heads as the IBM Hard disk drive, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregon
Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of its eastern boundary with Idaho. The 42nd parallel north, 42° north parallel delineates the southern boundary with California and Nevada. The western boundary is formed by the Pacific Ocean. Oregon has been home to many Indigenous peoples of the Americas, indigenous nations for thousands of years. The first European traders, explorers, and settlers began exploring what is now Oregon's Pacific coast in the early to mid-16th century. As early as 1564, the Spanish expeditions to the Pacific Northwest, Spanish began sending vessels northeast from the Philippines, riding the Kuroshio Current in a sweeping circular route across the northern part of the Pacific. In 1592, Juan de Fuca undertook detailed mapping a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hard Disk Drive
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating hard disk drive platter, platters coated with magnetic material. The platters are paired with disk read-and-write head, magnetic heads, usually arranged on a moving actuator arm, which read and write data to the platter surfaces. Data is accessed in a random-access manner, meaning that individual Block (data storage), blocks of data can be stored and retrieved in any order. HDDs are a type of non-volatile storage, retaining stored data when powered off. Modern HDDs are typically in the form of a small disk enclosure, rectangular box. Hard disk drives were introduced by IBM in 1956, and were the dominant secondary storage device for History of general-purpose CPUs, general-purpose computers beginning in the early 1960s. HDDs maintained this position into the modern er ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fellows Of The IEEE
, the Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines. The IEEE has a corporate office ... (IEEE) has 7,236 members designated Fellow, each of whom is associated with at least one of the 41 societies under the IEEE. The Fellow grade of membership is the highest level of membership, and cannot be applied for directly by the member – instead the candidate must be nominated by others. This grade of membership is conferred by the IEEE board of directors in recognition of a high level of demonstrated extraordinary accomplishment. * Aerospace and Electronic Systems Society – List of fellows * Antennas & Propagation Society – List of fellows * IEEE Broadcast Technology Society – List of fellows * Circuits and Systems Society – List of fellows * Communica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain View, California
Mountain View is a city in Santa Clara County, California, United States, part of the San Francisco Bay Area. Named for its views of the Santa Cruz Mountains, the population was 82,376 at the 2020 United States census, 2020 census. Mountain View was integral to the early history and growth of Silicon Valley, and is the location of many high technology companies. In 1956, William Shockley established Shockley Semiconductor Laboratory in Mountain View, the first company to develop silicon semiconductor devices in Silicon Valley. Mountain View houses the headquarters of many of the world's largest technology companies, including Google and Alphabet Inc., Unicode Consortium, Intuit, Applied Intuition, NASA Ames Research Center, and former or existing headquarters for NortonLifeLock, Symantec, 23andMe, LinkedIn, Samsung, Quora and Synopsys. History The fertile land between the Santa Cruz Mountains and the shores of the southern San Francisco Bay once supported multiple village ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer History Museum
The Computer History Museum (CHM) is a computer museum in Mountain View, California. The museum presents stories and artifacts of Silicon Valley and the Information Age, and explores the Digital Revolution, computing revolution and its impact on society. History The museum's origins date to 1968 when Gordon Bell began a quest for a historical collection and, at that same time, others were looking to preserve the Whirlwind (computer), Whirlwind computer. The resulting ''Museum Project'' had its first exhibit in 1975, located in a converted coat closet in a Digital Equipment Corporation, DEC lobby. In 1978, the museum, now ''The Digital Computer Museum'' (TDCM), moved to a larger DEC lobby in Marlborough, Massachusetts and opened to the public in September 1979. Maurice Wilkes presented the first lecture at TDCM in 1979 – the presentation of such lectures has continued to the present time. TDCM incorporated as ''The Computer Museum, Boston, The Computer Museum'' (TCM) in 1982. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christopher Bajorek
Christopher Henry Bajorek (born November 26, 1943) is a data storage engineer noted for his leadership in developing and implementing magnetoresistive sensors into magnetic stripe readers, tape drives and hard disk drives. Early life and education Christopher Henry Bajorek was born in Tel Aviv, Mandatory Palestine, on November 26, 1943. His parents were George L. H. (POW Kolyma, Russia, 1940–42) and Rosalia (Lipka) B. (POW Kazakhstan, Russia, 1940–42); He married Janet Fullmer in 1965. They have two children: Peter C. and Jennifer L. Bajorek attended Pasadena City College before transferring to the California Institute of Technology, Pasadena, California, where he received a Bachelor of Science (B.S.) degree in 1967, a Master of Science (M.S.), in electrical engineering (EE) in 1968; and a Ph.D. in electrical engineering in 1972 all from Caltech. He now resides in Los Gatos, California. Career Bajorek joined IBM Yorktown in 1971 becoming part of the research effort led ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bernard Dieny
Bernard Dieny is a research scientist and an entrepreneur. He is Chief Scientist at SPINTEC (Spintronics and Technology of Components), a CEA/CNRS/UGA research laboratory that he co-founded in 2002 in Grenoble, France. He is also co-founder of two startup companies: Crocus Technology on MRAM and magnetic sensors in 2006 and EVADERIS on circuits design in 2014. Dieny has published over 480 papers and has 77 patents awarded. His main research interests center around magnetism and spin electronics, including spintronics phenomena, spintronic materials and applications, particularly memory (MRAM) devices, interfacial magnetism, perpendicular magnetic anisotropy, hybrid CMOS/magnetic technology, magnetic recording technology and magnetic biotechnologies. He received two advanced research grants from the European Research Council (ERC) focused on the design, fabrication and evaluation of ultra-low power and multifunctional spintronic circuits particularly suitable for the Internet of T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Recording
Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads. Magnetic storage media, primarily hard disks, are widely used to store computer data as well as audio and video signals. In the field of computing, the term ''magnetic storage'' is preferred and in the field of audio and video production, the term ''magnetic recording'' is more commonly used. The distinction is less technical and more a matter of preference. Other examples of magnetic storage media include floppy disks, magnetic tape, and magnetic stripes on credit cards. History Magnetic storage in the form of wire recording—audio recording on a wire—was publicized by Oberlin Smith in the Sept 8, 1888 issue of ''Electrical World''. Smith had previously filed a patent in September ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giant Magnetoresistance
Giant magnetoresistance (GMR) is a quantum mechanics, quantum mechanical magnetoresistance effect observed in multilayers composed of alternating ferromagnetic and non-magnetic conductive layers. The 2007 Nobel Prize in Physics was awarded to Albert Fert and Peter Grünberg for the discovery of GMR, which also sets the foundation for the study of spintronics. The effect is observed as a significant change in the electrical resistance depending on whether the magnetization of adjacent ferromagnetic layers are in a parallel or an Antiparallel (electronics), antiparallel alignment. The overall resistance is relatively low for parallel alignment and relatively high for antiparallel alignment. The magnetization direction can be controlled, for example, by applying an external magnetic field. The effect is based on the dependence of electron scattering on spin orientation. The main application of GMR is in magnetic field sensors, which are used to read data in hard disk drives, biosens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fellow Of The Institute Of Electrical And Electronics Engineers
, the Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines. The IEEE has a corporate office ... (IEEE) has 7,236 members designated Fellow, each of whom is associated with at least one of the 41 societies under the IEEE. The Fellow grade of membership is the highest level of membership, and cannot be applied for directly by the member – instead the candidate must be nominated by others. This grade of membership is conferred by the IEEE board of directors in recognition of a high level of demonstrated extraordinary accomplishment. * Aerospace and Electronic Systems Society – List of fellows * Antennas & Propagation Society – List of fellows * IEEE Broadcast Technology Society – List of fellows * Circuits and Systems Society – List of fellows * Communica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bit-patterned Media
Patterned media (also known as bit-patterned media or BPM) is a potential future hard disk drive technology to record data in magnetic islands (one bit per island), as opposed to current hard disk drive technology where each bit is stored in within a continuous magnetic film. The islands would be patterned from a precursor magnetic film using nanolithography. It is one of the proposed technologies to succeed perpendicular recording due to the greater storage densities it would enable. BPM was introduced by Toshiba in 2010. Comparison with existing HDD technology In existing hard disk drives, data is stored in a thin magnetic film. This film is deposited so that it consists of isolated (weakly exchange coupled) grains of material of around diameter. One bit of data consists of around that are magnetized in the same direction (either "up" or "down", with respect to the plane of the disk). One method of increasing storage density has been to reduce the average grain volume. However ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spin-transfer Torque
Spin-transfer torque (STT) is an effect in which the orientation of a magnetic layer in a magnetic tunnel junction or spin valve can be modified using a spin-polarized current. Charge carriers (such as electrons) have a property known as spin which is a small quantity of angular momentum intrinsic to the carrier. An electric current is generally unpolarized (consisting of 50% spin-up and 50% spin-down electrons); a spin polarized current is one with more electrons of either spin. By passing a current through a thick magnetic layer (usually called the “fixed layer”), one can produce a spin-polarized current. If this spin-polarized current is directed into a second, thinner magnetic layer (the “free layer”), the angular momentum can be transferred to this layer, changing its orientation. This can be used to excite oscillations or even flip the orientation of the magnet. The effects are usually seen only in nanometer scale devices. Spin-transfer torque memory Spin-tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
