IEEE Magnetics Society Santa Clara Valley Chapter

The objective of the Santa Clara Valley Chapter of the IEEE Magnetics Society is to sponsor local seminars and publicize conferences, workshops and other information of interest to the Society's local members and technical people in the area of applied magnetics.

Upcoming Meetings:   September October Please note that starting in September 2008, the chapter meetings will begin at 7:30 PM (Cookies, Converstation and Pizza too at 7 PM) [ Click here for a PDF version of this announcement ] [ Click here for abstracts of past meetings: | 2006 | 2007 | 2008 | ( 200K )  ] [ Chapter officers and contacts - click here ]

 

IEEE and IDEMA links:
IEEE Magnetics Society	[ Bay Area e-GRID ]	[ Santa Clara Valley Section ]

[ San Francisco Section ]	[Oakland / East Bay Section]	[ IDEMA ] Diskcon 2008 information	[ Magnetic Disk Heritage Center ]

 

 

Tuesday, September 9th, 2008  Western Digital, 1710 Automation Parkway, San Jose,CA Directions and Map Cookies, Conversation & Pizza too at 7:00 P.M.  Presentation at 7:30 P.M. A BRIEF HISTORY OF MAGNETIC TAPE RECORDING AT AMPEX - 1944 to 1962 by John M. Leslie and Jay McKnight Abstract This talk covers the History of Magnetic tape recording at Ampex Corporation from its inception in 1944 to 1962. It includes highlights of: (1) what led a small motor manufacturer to become a major producer of magnetic tape recorders and an industry leader for decades; (2) development of the Ampex 200A; (3) the Model 300, which became the backbone of both the audio and data recording industries; (4) the Model 350 which became the workhorse of many radio and recording studios; (5) multi-channel recorders for widescreen theater productions; and (6) development of the Ampex VR-1000 videotape recorder that revolutionized the television broadcast industry. The paper also includes comments on the equalization characteristics used in Ampex’s audio and data recorders. It closes with a look back at events that slowed the momentum of the "glory years" of Ampex.

Biography John M. Leslie  Born 1921, in Springfield, MO.  BSEE (‘49, Berkeley)  MSME (‘63, Stanford)  EME (‘65, Stanford) Military 1942-46   U.S. Navy Ampex Corp. 1948-62   Rising from Subcontractor   to Vice President and General Manager Stanford Univ. 1963-65   Associate Professor (acting)   in Mechanical Engineering Hewlett Packard 1966-69   Manager of Engineering Pemtek Corp. 1970-76   Part owner and Vice President of Engineering United Scientific Corp 1976-81   Senior Vice President of Engineering,   President of Analytical Instruments Tracor Xray 1981-84   Vice President and General Manager Retirement     Wonderful time with our    5 children, their spouses, 13 grandchildren Contact: johnmleslie@msn.com

Biography John G. (Jay) McKnight  Born 1931 in Seattle, Washington  BS in Elec. Eng. from Stanford University in 1952 Ampex Corp 1952-72   Served in the magnetic recording research group,   stereo tape and professional audio division Magnetic Reference Lab.   Co-founder (1973), president since 1975. Mr. McKnight has published over 60 papers on the theory and practice of magnetic recording, and audio engineering (see bibliography at http://home.flash.net/%7Emrltapes/jmbibsub.pdf).  In 1973/74 he was a member of Judge Sirica's "Advisory Panel on White House Tapes" ('The Watergate Tapes').   Mr. McKnight has been very actively serving the Audio Engineering Society (AES): He is Fellow, President (1978/79), Honorary Member (1979), member of the AES Journal Review Board (1960 - 2007), Governor 4 times, Standards Committee Chairman (1971 - 74), Publications Policy Committee Chairman (1977/78), Historical Committee Chairman (1999 - 2006), and now Chair Emeritus of that Committee.  He has been a member of several standards committees on audio engineering and magnetic recording.  He received the AES’s Publication Award (1982), AES Award (1971), Board of Governors Award (1990) and the AES Distinguished Service Medal Award (10/2008) for extraordinary service to the Society and contributions to the advancement of knowledge in magnetic recording over a period of more than 50 years.  He is IEEE senior member, IEEE Magnetics Society member, "IRE (IEEE) Professional Group on Audio" member (1953 - 70). Contact: jaymck@flash.net

 

 

Tuesday, October 14th, 2008  Western Digital, 1710 Automation Parkway, San Jose,CA Directions and Map Cookies, Conversation & Pizza too at 7:00 P.M.  Presentation at 7:30 P.M. Turbulent Transitions and Frustrated States: Some Issues in Reversal by Dr. R Stamps University of Western Australia Abstract A trend over the last few decades in many areas of science and technology has been to modify and control material properties through careful choice of dimensions. A key feature of such endeavors is to create useful physical properties governed by surfaces and interfaces. Important length scales in magnetic metals are spin diffusion, which ranges from angstroms to nanometers, and exchange lengths, which can be on the order of several nanometers. Advanced techniques now allow us to create structures on these length scales in three dimensions. This is a remarkable achievement because it often represents true atomic level engineering, and is based on years of detailed study of thin films and multi-layers. A rich wealth of fascinating phenomena has emerged from studies of these types of constrained geometry structures within the contexts of high speed magnetization reversal and magnetic domain stability. This lecture will provide an introduction to essential concepts, illustrate examples of new physics, and present some challenging, unanswered questions. Topics will include examples of frustration in exchange bias systems and analogies to spin glasses; control of nonlinear processes in patterned magnetic structures and parametric processes incurred during high speed reversal; pinned and viscous domain wall motion in ultra-thin films and nanowires; and electronic and spin wave transport through domain walls. These examples will illustrate reversal processes and domain stability issues relevant for a wide variety of magnetic device applications, including concepts being explored for novel spin logic schemes.

Biography Robert Stamps Robert Stamps received BS and MS degrees from the University of Colorado, and a PhD in Physics from Colorado State University. He has taught at the University of Colorado, Ohio State University, and has been with the University of Western Australia since 1997 where he is now Associate Professor in Physics. Dr Stamps has held a Humbolt Junior Fellowship at RWTH Aachen, CNRS Professorial Fellowships (Strasbourg and Orsay), CNR Fellowship (Florence), a University of Paris VII Visiting Professorship, and received a Faculty Excellence in Teaching award in 2001. His work on exchange bias and magnetization dynamics featured in his tenure as the 2004 Wohlfarth Lecturer. Professor Stamps has published over 140 papers on a range of topics in magnetism, including linear and nonlinear dynamics of magnetic and ferroelectric nanostructures, frustrated spin systems and spin glasses, inelastic light scattering and ferromagnetic resonance, spin electronics and domain wall dynamics in constrained geometries and random systems. He is a member of the IOP, Australian AIP, and IEEE Magnetics Society, chair of the 2007 MML Symposium, and currently serves on the advisory editorial board of the Journal of Magnetism and Magnetic Materials. Contact: Robert Stamps, School of Physics M013, Univ of Western Australia, 35 Stirling Highway, Crawley WA 6018, Australia Tel: (+61) 8 6488 3794, Fax: (+61) 8 6488 1014 e-mail: :stamps@physics.uwa.edu.au More information: http://www.physics.uwa.edu.au/about/research/condensed

IEEE Santa Clara Valley Magnetics Section: Officers for 2008