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  • 1 ICTAC Committee for Standardization Magnetic Task Group 1409 South Way Court Salem SC 29676 USA 1409 South Way Court Salem SC 29676 USA
  • | 2 TA Instruments 109 Lukens Dr. New Castle DE 19720 USA 109 Lukens Dr. New Castle DE 19720 USA
  • | 3 Huddersfield University Queensgate Hudersfield HD1 3DH UK Hudersfield HD1 3DH UK
  • | 4 Hiroshima University Chemistry Laboratory, Faculty of School Education Hgashi-Hiroshima 739-8524 Japan Hgashi-Hiroshima 739-8524 Japan
  • | 5 N. Shore Col of Sony Inst Atsugi, Kanagawa 243-8501 Japan Atsugi, Kanagawa 243-8501 Japan
  • | 6 Rigaku Co Ltd Akishima 196-8666 Japan Akishima 196-8666 Japan
  • | 7 Mettler Toledo 130 Executive Dr., Suite 2A Newark DE 19702 USA 130 Executive Dr., Suite 2A Newark DE 19702 USA
  • | 8 Fed. Institute Mat. Res. Testing Rudower Ch. 5 12489 Berlin Germany Rudower Ch. 5 12489 Berlin Germany
  • | 9 Tokyo Met. University Minami-Osawa Hachioji, Tokyo 192-0397 Japan Minami-Osawa Hachioji, Tokyo 192-0397 Japan
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Abstract  

Magnetic transition temperatures, Tc, are measured by simultaneous TM/DTA for Alumel, cobalt, nickel, and three alloys of Ni and Co. The observed values of Tc are corrected using the values for the melting temperatures of pure metals used to define the International Temperature Scale. These corrections are based on the simultaneous melting of these pure metals alongside, but separate from, the magnetic sample. Nine investigators, using a wide variety of instrumentation, have made these measurements utilizing a standard protocol. The results are compared for several heating rates. It is planned to make these same magnetic materials ultimately available to the public for calibration of temperature of their TG instruments.

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