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SM ISO690:2012 BELINSKI, Moisei. Inelastic neutron scattering, epr and spin chirality in spin-frustrated v3 and cu3 nanomagnets with dzialoshinsky-moriya exchange. In: Chemistry Journal of Moldova, 2009, nr. 1(4), pp. 103-110. ISSN 1857-1727. |
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Chemistry Journal of Moldova | ||||||
Numărul 1(4) / 2009 / ISSN 1857-1727 /ISSNe 2345-1688 | ||||||
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Pag. 103-110 | ||||||
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The inelastic neutron scattering (INS) and EPR transitions are considered for the spin-frustrated V3 and Cu3nanomagnets. It is shown that the DM exchange and distortions determine the Q dependence and redistribution of the intensities of the intra- and inter-doublet INS transitions in the 2(S=1/2) states as well as the intensities of the EPR transitions. The peculiarities of the INS and EPR spectra of the V3 ring of V15 quantum molecular magnet and EPR spectra of the V3 and Cu3 nanomagnets are described by the isosceles Heisenberg model with the DM exchange. Spin chirality and spin structure of the Cu3 and V3 nanomagnets with the Dzialoshinsky-Moriya (DM) exchange interaction are analyzed in the vector and scalar spin chirality models. The vector chirality model describes the field, orientation and deformation dependence of the spin chirality κn. The spin chirality is formed by the DM interaction and depends on the sign of the DM parameter Gz. The DM exchange and distortions determine the degree of chirality κn<1 in the isosceles clusters. |
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