Abstract
We have succeeded in growth of large high-quality single crystals of SmBaMn 2 O 6 and measured their magnetism and electrical transport properties. The temperature dependence of the magnetization and resistivity exhibits anomalies at ∼375 and ∼200 K. The anomalies accompany hystereses and can be assigned to ordering and rearrangement transitions of charge and orbital of Mn ions, respectively. A broad peak in magnetic susceptibility at 250 K observed for pulverized samples is strongly suppressed in the case of single crystal. Magnetic susceptibility for a magnetic field parallel to the a -axis shows a kink at 175 K, below which a magnetic anisotropy emerges. The result indicates an antiferromagnetic transition of the Mn spin moments below the charge and orbital rearrangement transition, disagreeing with previous studies of polycrystalline samples.
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