Electron Paramagnetic Resonance of Manganese (II) in Hexagonal Zinc Oxide and Cadmium Sulfide Single Crystals

Doped Semiconductor Nanocrystals: Synthesis, Characterization, Physical Properties, and Applications

“…The axial zero-field splitting parameter for Mn 2þ in ZnO is only D ¼ À2.36 Â 10 À2 cm À1 , for example (143,144). Although tetrahedral Co 2þ also has no orbital angular momentum in its ground state ( 4 A 2 ), the proximity of the 4 T 2 (F) excited state gives rise to a larger zero-field splitting (e.g., D ¼ þ5.5 cm À1 in ZnO) (145), and the Brillouin function fails outside of the Curie region of high temperatures and small fields.…”

Zinc-Vacancy–Donor Complex: A Crucial Compensating Acceptor in ZnO

“…The obtained spinHamiltonian parameters are summarized in Table I. The spectrum of the reference sample contains two EPR signals that can be attributed to Mn 2þ [18] and a shallow donor, Al Zn 0 [19]. The Mn 2þ signal is present in all the studied samples before and after irradiation with the same concentration.…”

Efficient Auger Charge-Transfer Processes in ZnO

“…The third term is related to the fine structure splitting for S > ½ with the fine structure tensor D. The obtained spin-Hamiltonian parameters of the monitored EPR signals are summarized in Table I. The first EPR signal consists of six equidistant lines with equal intensity, implying a resolved hyperfine interaction with a nucleus with I ¼ 5=2, centered around g ¼ 2.0016, that can be attributed to a Mn 2þ ion substituting for Zn [39]. The second EPR signal consists of five lines with different intensities centered at g ¼ 2.006.…”