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Low temperature measurements of the hard magnetic materials.

Number: pap. 24

Author(s) : GRIGORAS M., URSE M., CHIRIAC H., et al.

Summary

Hard magnetic materials can be used at low temperatures down to the spin reorientation temperature, Tsr, (eg. around 135 K for Nd-Fe-B). In order to extend the lower limit of usage it is desired to decrease the value of Tsr. This paper reports the influence of different additions and substitutions (Mo, Mo-Cu, Ce) on the hard magnetic properties and Tsr of Nd-Fe-B based films prepared by vacuum deposition. The influence of embedding mode (by alloying or stratification) of additions (i.e. MoCu) in the Nd-Fe-B thin film volume on hard magnetic properties Tsr was also studied. The Nd-Fe-B films with MoCu additions, embedded by stratification, present an increase of the coercive field up to 23.9 kOe and a decrease of Tsr down to 56 K, while Nd-Fe-B films with Ce substitution present a slight deterioration of the magnetic properties and a decrease of Tsr down to 97 K.

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Details

  • Original title: Low temperature measurements of the hard magnetic materials.
  • Record ID : 30018358
  • Languages: English
  • Source: 1st IIR International Conference of Cryogenics and Refrigeration Technology (ICCRT 2016). Proceedings: Bucharest, Romania, June 22-25, 2016.
  • Publication date: 2016/06/22
  • DOI: http://dx.doi.org/10.18462/IIR.ICCRT.2016.0024

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