Studies on magnetic susceptibility and specific heat for 6H-perovskite-type oxides Ba3LnIr2O9 (Ln=La, Nd, Sm–Yb)
作者： Yoshihiro Doi , Yukio Hinatsu
DOI: 10.1016/J.JSSC.2004.05.051
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摘要: Abstract Magnetic properties of the 6H-perovskite-type oxides Ba3LnIr2O9 (Ln=La and Nd: monoclinic; Ln=Sm–Yb: hexagonal symmetry) were investigated. For all title compounds, a specific heat anomaly was found at 5.3–17.4 K. At corresponding temperatures, magnetic susceptibilities show slight variation in its gradient. These anomalies suggest ordering moments (S=1/2) remaining Ir4.5+2O9 face-shared bioctahedra. In addition, Ln3+ ions onset antiferromagnetic around these temperatures. The Ba3NdIr2O9 only shows ferromagnetic behavior below 17.4 K with remnant magnetization 1.25 μB. This may be due to Nd3+ moments.
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