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Noncontact thermoacoustic method to measure the magnetocaloric effect.

Author(s) : GOPAL B. R., CHAHINE R., FOLDEAKI M., BOSE T. K.

Type of article: Article

Summary

A sample with a periodically changing surface temperature induces exponentially decaying pressure waves which can be detected by a sensitive microphone. A magnetic material will exhibit a periodically changing surface temperature due to the magnetocaloric effect when subjected to a small alternating-current field superimposed over a direct-current field. Gadolinium has been used for calibration, and new results are presented for a gadolinium-dysprosium and a gadolinium-erbium alloy.

Details

  • Original title: Noncontact thermoacoustic method to measure the magnetocaloric effect.
  • Record ID : 1996-0672
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 66 - n. 1
  • Publication date: 1995/01
  • Document available for consultation in the library of the IIR headquarters only.

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