• Keine Ergebnisse gefunden

The g Factors and Defect Structure of Orthorhombic Dy

N/A
N/A
Info
Herunterladen
Protected

Academic year: 2022

Aktie "The g Factors and Defect Structure of Orthorhombic Dy"

Copied!
1
0
0

Wird geladen.... (Jetzt Volltext ansehen)

Jetzt herunterladen ( 1 Seite )

Volltext

(1)

The g Factors and Defect Structure of Orthorhombic Dy

3+

Ions in CdF

2

Crystals

Hui-Ning Donga, Shao-Yi Wub, Wei-Dong Chenc, and Deng-Feng Lia,b

aInstitute of Applied Physics, Chongqing University of Posts and Telecommunications, Chongqing 400065, P. R. China

bDepartment of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China

cInstitute of Solid State Physics, Sichuan Normal University, Chengdu 610066, P. R. China Reprint requests to Dr. H.-N. D.; E-mail: donghn@cqupt.edu.cn

Z. Naturforsch. 61a, 87 – 90 (2006); received November 11, 2005

The electronic paramagnetic resonance g factors gx, gyand gzof an orthorhombic Dy3+center in CdF2are studied by the perturbation formulae of the g factors for a 4f9ion in orthorhombic symmetry.

In these formulae, the contributions to g factors due to J-mixing among the ground6H15/2, the first excited6H13/2and the second excited6H11/2states via crystal-field interaction, lead to admixtures among the states with the same J-value via spin-orbit coupling. In addition, the admixtures between the lowest Kramers doubletΓ γand other 20 Kramers doubletsΓx within the states6HJ(J=15/2, 13/2 and 11/2) via crystal-field and orbital angular momentum interactions are considered. In the above orthorhombic center, the impurity Dy3+is associated with co-doped crystals with alkali metal ions in the [110] axis. By analyzing the g factors, we find that the impurity Dy3+ion does not reside in the ideal Cd2+site but moves towards the co-doped alkali metal ion along the [110] direction by a displacement∆Z≈0.272 ˚A.

Key words: Crystal-Field Theory; Electron Paramagnetic Resonance; Superposition Model; Dy3+; CdF2.

Referenzen

Jetzt herunterladen ( PDF - 1 Seite - 9.39 KB )

ÄHNLICHE DOKUMENTE

UNIVERSITY OF TARTU FACULTY OF SCIENCE AND TECHNOLOGY INSTITUTE OF TECHNOLOGY

To understand guard cell physiology and the role of ABA in the plant response to low air humidity, defined as the Vapor Pressure Deficit (VPD) between plants and the atmosphere,

University of Tartu Faculty of Science and Technology Institute of Physics

In contrast, for J 0 /J 1, the system reduces to a 2D square lattice Heisenberg model, the ground state of which has long-range antiferromagnetic order and no spin gap (the N´

Department of Physics and Astronomy University of Heidelberg

As the same sensors will be used in the inner and outer detector layers, the exprint should also have a similar width as the inner detector layer exprints.. Due to the fact that

Department of Physics and Astronomy University of Heidelberg

All local static displacements found in layer 3 were smaller than 2 µm, as large as or smaller than the average amplitudes of flow induced vibrations in the module.. Thus the

Theoretical Investigations of the Defect Structure and the g Factors of a Tetragonal Ni

1.) The local distance ∆ Z , smaller than the host ∆ Z, can be illustrated by the modification of local struc- ture properties around the impurity Ni 3+ replacing the Ti 4+. Since

Theoretical Investigation of the EPR g-factors for Yb

c Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054,

Center Found from EPR Measurements in CaF

c Institute of Solid State Physics, Sichuan Normal University, Chengdu 610066, China. d Department of Applied Physics, University of Electronic Science and Technology of China,

Theoretical Investigations of the EPR g Factors for Er

a Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054,