Magnetic properties of R ions in R Co sub 5 compounds ( R =Pr, Nd, Sm, Gd, Tb, Dy, Ho, and Er)
- Department of Physics, Jilin University, Changchun 130023, Jilin, People's Republic of China (CN)
The values of the {ital R}-Co exchange field {ital H}{sub ex} and the crystalline-electric-field parameters {ital A}{sub {ital n}}{sup {ital m}} at the rare-earth ({ital R}) site in {ital R}Co{sub 5} ({ital R}=Pr, Nd, Sm, Gd, Tb, Dy, Ho, and Er) and Y{sub 1{minus}{ital x}}Nd{sub {ital x}}Co{sub 5} ({ital x}=0.5, 0.6, 0.8, and 1.0) compounds are evaluated by a comparison of calculations with a series of experiments. The experiments provide the following data: temperature dependence of spontaneous magnetization of the compounds and magnetic moment of the rare-earth ion, magnetization curves along the crystallographic axes, and temperature dependence of the easy direction of magnetization. The anisotropies of the {ital R}-Co exchange interaction and the magnetic moment of the Co sublattice are taken into account in the calculation. The {ital R}-Co exchange field {ital H}{sub ex} decreases monotonically across the rare-earth series from Pr to Er. For PrCo{sub 5}, the value of {ital A}{sub 2}{sup 0} is much smaller than those of the other compounds, which suggests valence fluctuations for the Pr ion. For Y{sub 1{minus}{ital x}}Nd{sub {ital x}}Co{sub 5} and SmCo{sub 5}, the absolute value of {ital A}{sub 2}{sup 0} decreases with increasing temperature.
- OSTI ID:
- 5694715
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Vol. 43:10; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
Similar Records
Spin-reorientation phenomenon in pseudobinary (Pr sub 1 minus x R sub x )Co sub 5 compounds (R=Sm, Gd, Dy, Tb, Ho, and Er) as determined by ac susceptibility measurements
Magnetic properties of rare-earth borides with composition R(FeCo)/sub 4/ B