Naslov
Magnetic interactions in hexanuclear cluster compounds of niobium and tantalum

Autori
Perić, Berislav ; Planinić, Pavica ; Cordier, Stéphane ; Gautier, Régis ; Požek, Miroslav ; Bosiočić, Marko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstract Book / - Trogir, 2011, O-27

Skup
2nd Workshop on Recent Advances in Broad-Band Solid-State NMR of Correlated Electronic Systems

Mjesto i datum
Trogir, Hrvatska, 04.09.2011. - 09.09.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
magnetic interactions; clusters; niobium; tantalum

Sažetak
Octahedral hexanuclear clusters of Mo, W, Nb and Ta draw attention in the solid state research due to interesting phenomena they exert such as superconductivity at high critical fields and specific thermoelectric properties. Nb and Ta halide clusters, with the [M6L12]n+ structural unit exist in three different oxidation states (n = 2, 3 or 4). Magnetic interactions between paramagnetic clusters (n = 3) have been noticed experimentally some time ago, whereas the role of bridging atoms (L) has been revealed using 19F ssNMR spectroscopy only 5 years ago [1]. More recently, a model of Heisenberg antiferromagnet (H = 􀀀Jåi ; j Si
Sj) has been proposed for several Ta6 halide cluster compounds [2]. Symmetry of the lattice determines the onset of an unusual long-range ordering. Usefulness of broad-band ssNMR and NQR spectroscopies in the investigation of these phase transitions will be discussed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA