NEW ABSOLUTE MAGNETIC MOMENT STANDARD REFERENCE MATERIAL FOR THE RECORDING INDUSTRY.A new Standard Reference Material (SRM (1) (Storage Resource Management) The management of the storage resources in an organization in order to avoid duplication of files and to determine space utilization across all servers. ) for use in calibrating the magnetometers used in the recording industry and research laboratories has been issued. Industry should find this SRM (SRM 762) more useful than the existing SRM (SRM 772a) because its geometry is similar to the sample shapes used for recording tape or hard disk samples, and it will eliminate the need for applying shape corrections for accurate measurements. Because the magnetic properties of metals depend on thermomechanical processing history and geometry as well as purity, the properties of the nickel disks used for this SRM were certified See certification. using the absolute magnetometer developed by NIST (National Institute of Standards & Technology, Washington, DC, www.nist.gov) The standards-defining agency of the U.S. government, formerly the National Bureau of Standards. It is one of three agencies that fall under the Technology Administration (www.technology. . The saturation saturation, of an organic compound saturation, of an organic compound, condition occurring when its molecules contain no double or triple bonds and thus cannot undergo addition reactions. moment of the new SRM (1.75 [mAm.sup.2] or 1.75 emu) is about half that of the old SRM which may be advantageous for some magnetometers. The new SRM is certified for applied fields between 280 kA/m and 4000 kA/m (3500 Oe and 50 000 Oe) and for temperatures between 280 K and 310 K. |
|
||||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion