Premium
EPR and Optical‐Absorption Studies of Cu 2+ ‐Doped Mg(CH 3 COO) 2 · 4H 2 O Single Crystal
Author(s) -
Misra Sushil K.,
Wang Chunzheng
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221540124
Subject(s) - electron paramagnetic resonance , tetragonal crystal system , analytical chemistry (journal) , ion , doping , absorption spectroscopy , crystallography , single crystal , chemistry , tetrahydrate , crystal structure , materials science , nuclear magnetic resonance , optics , physics , optoelectronics , organic chemistry , chromatography
X‐band EPR measurements on a single crystal of Cu 2+ ‐doped magnesium acetate tetrahydrate, Mg(CH 3 COO) 2 · 4H 2 O, are made at 295, 77, and 4.2 K. The Cu 2+ spin‐Hamiltonian parameters are evaluated, at all these temperatures, from the EPR line positions by means of a rigorous leastsquares fitting method. The principal values of the g 2 and A 2 tensors indicate that the local symmetry of the Cu 2+ ion, in the host lattice of Mg(CH 3 COO) 2 · 4H 2 O crystal, is tetragonal. The room‐temperature optical‐absorption spectrum, recorded in the 190 to 820 nm wavelength range, is exploited to study the crystal‐field and charge‐transfer transitions of the Cu 2+ ion. On the other hand, both the room‐temperature optical‐absorption and EPR data are used to estimate the core polarization contribution (K) and the molecular‐orbital coefficients for the Cu 2+ ion doping Mg(CH 3 COO) 2 · 4H 2 O.