TITLE

Inversion of Spin Levels in Ni[sup 2+] : Zn(BF[sub 4])[sub 2] · 6H[sub 2]O under Uniform Compression and the Effect of Transition Coincidence

AUTHOR(S)
Krygin, I. M.; Prokhorov, A. A.; Neılo, G. N.; Prokhorov, A. D.
PUB. DATE
December 2001
SOURCE
Physics of the Solid State;Dec2001, Vol. 43 Issue 12, p2242
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The electron paramagnetic resonance (EPR) spectra of Ni[sup 2+] ions substituting for Zn[sup 2+] ions in Zn(BF[sub 4])[sub 2] · 6H[sub 2]O crystals are studied over a wide range of temperatures under uniform compression. Measurements are performed in the X- and Q-bands. The parameter D, which characterizes the initial splitting, undergoes considerable variations with changes in temperature and pressure, whereas the g factor remains virtually unchanged. An increase in the temperature is accompanied by a nonlinear increase in D. Under uniform compression, the initial splitting varies linearly and the parameter D changes its sign at 3.5 kbar, which indicates inversion of the spin levels. The coincidence of the EPR lines associated with different transitions leads to the appearance of line-profile dips in the spectra due to cross-relaxation inside the spin system. © 2001 MAIK “Nauka / Interperiodica”.
ACCESSION #
7293034

 

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