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

• Authors: R. Michalski , Z. Ropka , R. Radwański
• Languages of publication: 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.

Keywords

EN

71.70.-d; 71.20.Eh

Discipline

• 71.70.-d: Level splitting and interactions(see also 73.20.-r Surface and interface electron states; 75.30.Et Exchange and superexchange interactions)
• 71.20.Eh: Rare earth metals and alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 5
• Pages: 767-770

Dates

published

2000-05

Contributors

author

R. Michalski

• Institute of Physics, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
• Center for Solid State Physics, św. Filip 5, 31-150 Kraków, Poland

author

Z. Ropka

• Center for Solid State Physics, św. Filip 5, 31-150 Kraków, Poland

author

R. Radwański

• Institute of Physics, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
• Center for Solid State Physics, św. Filip 5, 31-150 Kraków, Poland

Identifiers

DOI

10.12693/APhysPolA.97.767