Jahn-Teller EPA spectra of Cu2 + in MgSif6.6H20
| dc.creator | Rubins, R. S., Tello, Lucio N., De, Dilip Kumar, Black, T. D. | |
| dc.date | 1984 | |
| dc.date.accessioned | 2025-03-28T16:25:26Z | |
| dc.description | The 34 GHz EPR spectrum ofCu2+ in MgSiF6-6H20 showed a "static" Jahn-Teller effect at 4.2 K with two inequivalent Jahn- Teller sites per unit cell. The six axially symmetric sets of Cu2+ lines had their z axes parallel to the three tetragonal axes of two cubes, which were rotated by approximately 40" with respect to each other about a common (Ill) axis, which is the crystal c axis. The measured spin-Hamiltonian parameters at 4.2 K for each set of lines were g11 = 2.47 ± 0.01, g1 = 2.10 ± 0.01 , and lA 11 1 = (110 ± 3)X 10- 4 em- •. There was a gradual decrease in the anisotropy of the spectrum on warming the crystal, with a single, nearly isotropic line being observed above 220 K. At 270 K the spectrum had axial symmetry about the c axis with Kn = 2.23 ± 0.01 and g~ = 2.25 ± 0.01 . The temperature evolution of the spectrum was interpreted in terms of a Boltzmann distribution over inequivalent distorted Jahn-Teller configurations, with one potential well lowered by an amount L1:::::: I 05 em- 1 below the other two. | |
| dc.format | application/pdf | |
| dc.identifier | http://eprints.covenantuniversity.edu.ng/5403/ | |
| dc.identifier.uri | https://repository.covenantuniversity.edu.ng/handle/123456789/34730 | |
| dc.language | en | |
| dc.publisher | American Institute of Physics | |
| dc.subject | QC Physics | |
| dc.title | Jahn-Teller EPA spectra of Cu2 + in MgSif6.6H20 | |
| dc.type | Article |