Gd(3+)-Yb(3+) Exchange Interactions in LiYb(x)Y(1-x)F4 Single Crystals
Abstract
The evaluated Gd(3+) -Yb(3+) exchange interactions over the nearest and the next-nearest neighbors in LiYb(x)Y(1-x)F4 are found to increase in parabolic manner with x, the concentration of Yb(3+) ions. The Gd(3+) -Yb(3+) exchange interactions are sensitive to x in the range x = 0.6 - 1.0, while they are almost constant in the range x = 0.1 - 0.5. The estimated Gd(3+) -Yb(3+) exchange interaction constants, (J = J(sub nn) + J(sub nnn)), are in the range 0.5 - 2.8 GHz for x from 0.1 to 1, respectively. These exchange interaction constants are increased with lowering temperature. The results are comparable to those of estimated using the molecular-field model. The average Gd(3+) -Yb(3+) pair exchange interaction constant is determined to be 0.33 GHz in paramagnetically diluted LiYb(x)Y(1-x)F4 crystals.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2001
- Accession Number
- ADP011893
Entities
People
- Lucjan E. Misiak