An analysis of the Pr contribution to the spin-reorientation phenomenon in PrCo sub 5

Journal Article · Fri Nov 15 04:00:00 EST 1991 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.350019· OSTI ID:5061730

Ma, B M; Kawai, T; Sankar, S G; Wallace, W E ^[1]

---

1. MEMS Department and Carnegie Mellon Research Institute Carnegie Mellon University, Pittsburgh, Pennsylvania (USA)

Spin-reorientation phenomenon in the PrCo{sub 5} compound has been analyzed over the temperature range 0 to 300 K using a Hamiltonian consisting of the crystal-field term and the 4{ital f}--3{ital d} exchange interaction. We have performed a careful analysis by including the second- and the fourth-order interaction terms to the crystal-field Hamiltonian. In general, the crystal-field {ital B}{sup 0}{sub 2} term favors the planar anisotropy while {ital B}{sup 0}{sub 4} term promotes an axial anisotropy. The combination of these two terms yield the off-axial anisotropy of the Pr sublattice. The magnitudes of {ital B}{sup 0}{sub 2} and {ital B}{sup 0}{sub 4} contribution are relatively strong at low temperatures and decrease considerably with increasing temperature. The contribution of the {ital B}{sup 0}{sub 2} term is more pronounced than that of the {ital B}{sup 0}{sub 4} term throughout the temperature range investigated. The competition between the off-axial anisotropy of Pr sublattice and the axial anisotropy of Co sublattice yields the spin-reorientation transition phenomenon in PrCo{sub 5} at 105 K.

• OSTI ID: 5061730
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 70:10; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
COBALT ALLOYS
COBALT BASE ALLOYS
CRYSTAL FIELD
INTERMETALLIC COMPOUNDS
LOW TEMPERATURE
MEDIUM TEMPERATURE
ORIENTATION
PRASEODYMIUM ALLOYS
RARE EARTH ALLOYS
SPIN ORIENTATION
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE