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2000 | 97 | 5 | 767-770
Article title

Crystal-Field Origin of the Giant Magnetocrystalline Anisotropy of PrRu_{2}Si_{2}

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EN
Abstracts
EN
PrRu_{2}Si_{2} shows ferromagnetism below 14 K with the ordered moment of 2.7μ_{B}. It exhibits an enormous magnetic anisotropy at 4.2 K with the anisotropy field of about 400 T. We have attrributed the magnetism of PrRu_{2}Si_{2} to the Pr^{3+} ions. Thus we performed calculations of the fine electronic structure of the Pr^{3+} ion in the tetragonal symmetry, relevant to PrRu_{2}Si_{2}, taking into account crystal-field and inter-site exchange interactions. Our calculations reproduce well the zero-temperature moment, the single-crystalline magnetization curves, and giant anisotropy field as 400 T. The magnetocrystalline-anisotropy energy K_{1} of 59 J/cm^{3} is the largest known anisotropy - the anisotropy energy of the Nd_{2}Fe_{14}B supermagnet amounts to 12.5 J/cm^{3} only. Unfortunately, this giant anisotropy is confined to low temperatures only which prohibits its technical applications in the permanent-magnet industry.
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Contributors
author
  • Institute of Physics, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
  • Center for Solid State Physics, św. Filip 5, 31-150 Kraków, Poland
author
  • Center for Solid State Physics, św. Filip 5, 31-150 Kraków, Poland
author
  • Institute of Physics, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
  • Center for Solid State Physics, św. Filip 5, 31-150 Kraków, Poland
References
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bwmeta1.element.bwnjournal-article-appv97z509kz
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