Spin-Orientation Diagrams and Magnetic Anisotropy of Rare-Earth-Iron Ternary Cubic Laves Compounds

Journal Article · Tue May 01 04:00:00 EDT 1973 · Physical Review, B: Solid State

DOI:https://doi.org/10.1103/PhysRevB.7.4220· OSTI ID:4434953

Atzmony, U.; Dariel, M. P.; Bauminger, E. R.; Lebenbaum, D.; Nowik, I.; Ofer, S.

Directions of the easy magnetization in the Ho_xTb_1-xFe₂ , Ho_xEr_1-x Fe₂, Dy/sub x/Tb_1-xFe₂, Dy_xE_1-xFe₂/, and Ho_x Tm_1-xFe₂ systems were determined as a function of x and temperature by means of the Moessbaurr effect in ⁵⁷Fe. If the direction of magnetization of each system is described by a (x,T) spin-- orientation diagram, it is found that the (x,T) plane is divided into two or three regions, in each of which the direction of magnetization is along a different major crystal axis. Theoretical calculations based on the assumption that the magnetic crystalline anistropy is due to the anisotropy of the interaction between the 4f electrons of the rare-earth ions with the crystal fields reproduced the general features of the experimental results though small discrepancies remained. Taking into account an additional contribution to the anisotropy attributed to the Fe -- Fe interaction improved the agreement between the theoretical and experimental spin-orientation diagrams. From the theoretical fits to the experimental results a value of (--0.038 plus or minus parameters A₆/A₄. The transitions between the regions of the spin--orientation diagrams are not sharp. Possible reasons for the existence of the transition regions are discussed. (9 figures, 3 tables, 15 references) (auth)

• Research Organization: Nuclear Research Center, Negev, Israel
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-000979
• OSTI ID: 4434953
• Journal Information: Physical Review, B: Solid State, Journal Name: Physical Review, B: Solid State Journal Issue: 9 Vol. 7; ISSN 0556-2805; ISSN PRBMDO
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*IRON 57-- MOESSBAUER EFFECT
*IRON ALLOYS-- MAGNETIC PROPERTIES
ANISOTROPY
CRYSTAL FIELD
DYSPROSIUM ALLOYS-- ERBIUM ALLOYS
ERBIUM ALLOYS-- HOLMIUM ALLOYS
HOLMIUM ALLOYS-- TERBIUM ALLOYS
HOLMIUM ALLOYS-- THULIUM ALLOYS
INTERMETALLIC COMPOUNDS
LAVES PHASES
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
ORIENTATION
PHASE TRANSFORMATIONS
SPECTRA
SPIN DYSPROSIUM ALLOYS-- TERBIUM ALLOYS