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The specific heat of alumel and chromel alloys near their magnetic transitions

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
243
Identifiers
DOI: 10.1016/s0925-8388(96)02366-3
Keywords
  • Alumel-Chromel
  • Specific Heat
  • Magnetic Transitions
  • Alloys
Disciplines
  • Physics

Abstract

Abstract We report the results of specific heat measurements at zero magnetic field and normal pressure on chromel (90%Ni10%Cr) and alumel (95%Ni2%Mn2%Al) alloys using high-resolution a.c. calorimetry. We find a large anomaly in the specific heat at 225 K (for chromel) and at 463 K (for alumel), which is associated with the transition of each alloy into a ferromagnetic ordering when they are cooled below their corresponding Curie points. The experimental data for both alloys are compared with previously reported specific heat data of pure Ni Near T c, and for both alloys a critical behavior quite similar to Ni is found.

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