Magnetic ordering of the R4Sb3 compounds (R = Pr, Nd, Sm) and of Pr2Nd2Sb3статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Magnetization and neutron diffraction studies have been performed on Pr4Sb3, Nd4Sb3, Sm4Sb3 and on the Nd2Pr2Sb3 solid solution (all cubic anti-Th3P4-type, Space group I43d, N. 220). Magnetization data on Sm4Sb3 reveal a ferromagnetic transition at TC = 168 K. The neutron diffraction study indicates a spincanted commensurate antiferromagnetic structure below TC = 37K and 52K for Pr4Sb3 and Pr2Nd2Sb3compounds, respectively; forNd4Sb3, onlowering the temperature first a ferromagnetic structure appears at TC = 77K which is followed below TC2 = 39K again by a spin-canted structure. At 2K the magnetic moments amount to 2.89 mB/Pr3+, 2.86 mB/(Pr0.5Nd0.5)3+ and 2.98 mB/Nd3+, respectively for Pr4Sb3, Pr2Nd2Sb3 and Nd4Sb3. The magnetic propagation vector is in all cases K = [0, 0, 0]. The canting increases when going from Nd4Sb3 over Nd2Pr2Sb3 to Pr4Sb3.