AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA PHYSICA - Ediţia nr.1-2 din 2021 | |||||||
Articol: |
MAGNETIC PROPERTIES OF PrFe11Ti ALLOYS BY Co AND Zr DOPING. Autori: D. BENEA. |
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Rezumat: DOI: 10.24193/subbphys.2021.01 Published Online: 2021-12-30 Published Print: 2021-12-30 pp. 9-17 VIEW PDF FULL PDF Theoretical investigations on the electronic and magnetic properties (magnetic moments, magneto-crystalline anisotropy, exchange-coupling parameters) of the PrFe11-xCoxTi (x = 0 – 3) and Pr0.8Zr0.2Fe11Ti alloys are presented. Our calculations show that Co for Fe doping in PrFe11-xCoxTi maximize the calculated total magnetic moment and magnetocrystalline anisotropy energy (MAE) for x = 1. The calculated exchange-coupling parameters for the first neighbours of each Fe site (8i, 8j and 8f) show an increase by increasing the Co content suggesting higher Curie temperatures for Co doped PrFe11Ti-based alloys. On the other hand, the Zr for Y substitution in Pr1-yZryFe11Ti (y = 0 - 0.2) decreases MAE without a noticeable decrease of the calculated total magnetic moment. Zr doping has opposite effects on the exchange coupling parameters Jij for different spin pairs. As consequence, any significant changes of the Curie temperatures are predicted for Zr doped PrFe11Ti-based alloys in the investigated doping range. Keywords: A. ab-initio calculations; B. magneto-crystalline anisotropy; C. magnetization; D. rare earth magnets. |
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