IIR document

Complex behaviour of magnetization and magnetocaloric effect in low magnetic field in the vicinity of magnetic phase transitions.

Author(s) : ZVEREV V. I., TISHIN A. M.

Summary

The new method of finding the precise value of temperature at which MCE reaches its maximum is proposed. It's based on the solving of variational maximum problem as regards integral equation for MCE. Also it was experimentally shown that the MCE maximum point shifts towards higher temperatures in low magnetic fields. So the general character of MCE maximum point behaviour is determined i.e. while the magnetic field increases the MCE maximum point shifts towards higher temperatures from the approximate point in the case of zeroth-magnetic field. According to this we offer to consider the MCE maximum point not as a constant but as function of magnetic field. Two complex temperature-field dependences of magnetization based on such an approach are received. The question of the explicit character of this function stays open and should be solved experimentally.

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Pages: 2009-3

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Details

  • Original title: Complex behaviour of magnetization and magnetocaloric effect in low magnetic field in the vicinity of magnetic phase transitions.
  • Record ID : 2009-1618
  • Languages: English
  • Source: 3rd International Conference on Magnetic Refrigeration at Room Temperature
  • Publication date: 2009/05/11

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