17 KB172 KB15 KB199820252002Coronado, EugenioGómez-García, Carlos J.Jagličić, ZvonkoLužnik, JankoMazej, ZoranPirnat, JanezTrontelj, Zvonkoštevilka:2letnik:498 stranistr. 221-228ISSN:1318-0207COBISSID:16807207URN:URN:NBN:SI:doc-MZD262WOenSlovensko kemijsko društvoActa chimica slovenicafluoridikobaltove spojinemagnetne lastnostimanganove spojineMagnetic study of paramagnetic compounds M(AsF6)2 (M = Co, Mn) and Co(AsF6)2.2L (L = AsF3, SbF3, SO2)| Magnetna študija paramagnetnih spojin M(AsF6)2 (M = Co, Mn) in Co(AsF6)2.2L (L = AsF3, SbF3, SO2)|DC magnetization measurements with a SQUID susceptometer have been performed on ?$Mn(AsF_6)_2$? ?$Co(AsF_6)_2$? and three ?$Co(AsF_6)_2$? compounds with different ligands ?$(AsF_3, SbF_3, SO_2$?. All samples demonstrate paramagnetic behaviour above 50 K. The measured Curie constants are compatible with ?$Mn^{+2}$? and ?$Co^{+2}$? ions. An addition, the samples with ?$Co$? atoms show magnetic ordering below 40 K. Investigation of arsenic NQR only in ?$Co(AsF_6)_2 \cdot 2AsF_3$?, reveals three lines: one near 122 MHz and two near 50 MHz. Relation of these spectral lines to the structure is obtained. Possible influence of paramagnetic ?$Co$? is examinedS pomočjo susceptometra na osnovi SQUIDa smo opravili meritve dc magnetizacije v ?$Mn(AsF_6)_2$? in v štirih spojinah ?$Co(AsF_6)_2$? z različnimi ligandi. Vsi vzorci se nad 50 K obnašajo paramagnetno. Izmerjene Curiejeve konstante ustrezajo ionom ?$Mn^{+2}$? in ?$Co^{+2}$?. Vzorci s ?$Co$? atomi izkazujejo poleg pretežnega paramagnetnega obnašanja pod 40 K tudi znake magnetnega urejanja. Meritev JKR arzena je samo v ?$Co(AsF_6)_2 \cdot 2AsF_3$? odkrila tri črte: eno v bližini 122 MHz in dve v bližini 50 MHz. Proučili smo zvezo tega spektra s kristalno strukturo in vpliv paramagnetnega ?$Co$?TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaSlovensko kemijsko društvo