Nonsecular contribution to the decay of spin-echo signals of quadrupolar nuclei in magnetically ordered materials

Autor:	A. I. Gorbovanov, N. A. Sergeev, S. N. Polulyakh, V. N. Berzhanskii, G. N. Abelyashev
Rok vydání:	1999
Předmět:	Physics Ferromagnetism Condensed matter physics Spin polarization Solid-state physics Nuclear Theory Echo (computing) Quadrupole Spin echo General Physics and Astronomy Condensed Matter::Strongly Correlated Electrons Spin (physics) Spectral line
Zdroj:	Journal of Experimental and Theoretical Physics. 89:112-118
ISSN:	1090-6509 1063-7761
DOI:	10.1134/1.558961
Popis:	We analyze the influence of fluctuations of the nonsecular part of the spin Hamiltonian on the decay of ordinary and multiquantum signals of the two-pulse spin echo in a quadrupole spin system with an inhomogeneously broadened spectral line. Expressions are obtained for the rate of decay of an echo in the case of selective excitation of a signal from quadrupole nuclei with arbitrary spin. These expressions are then used to analyze the experimentally observed ordinary and multiquantum echo signals from quadrupole nuclei with spin I=3/2 (53Cr, 63Cu, and 65Cu) in ferromagnetic chromium chalcogenide spinels.
Databáze:	OpenAIRE
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