Influence of Al substitution on the structure and Co-sublattice magnetocrystalline anisotropy of Gd{sub 2}Co{sub 17} compounds

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.119258· OSTI ID:530000

Cheng, Z; Shen, B; Zhang, J; Liang, B; Guo, H ^[1]; Kronmueller, H ^[2]

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1. State Key Laboratory of Magnetism, Institute of Physics Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, Peoples Republic of (China)
2. Max-Planck-Institute fuer Metallforschung, Institut fuer Physik, Heisenbergstrasse 1, D-70569 Stuttgart (Germany)

The structure and magnetic properties of Gd{sub 2}Co{sub 17{minus}x}Al{sub x} compounds were investigated. All samples have a rhombohedral Th{sub 2}Zn{sub 17}-type structure and the replacement of Co by Al results in an approximately linear increase in the unit cell volumes at a rate of 8.2 {Angstrom}{sup 3}/Al. The Curie temperature decreases monotically with the increase of Al concentration. On the basis of magnetization curves at the compensation temperature, the intersublattice-molecular-field coefficient, n{sub RT}, and the RT exchange-coupling constant J{sub RT} have been determined. It is noteworthy that the substitution of Al has a significant effect on the magnetocrystalline anisotropy of the Co sublattice, and changes the easy magnetization direction of Gd{sub 2}Co{sub 17{minus}x}Al{sub x} compounds from the basal plane to the c axis. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 530000
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 70; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
COBALT ALLOYS
CRYSTAL STRUCTURE
CURIE POINT
EXCHANGE INTERACTIONS
FERROMAGNETIC MATERIALS
GADOLINIUM ALLOYS
MAGNETIC MOMENTS
MAGNETIZATION