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Robin T. Macaluso Satoru Nakatsuji B. Carter Zachary Fisk 《Journal of solid state chemistry》2005,178(11):3547-3553
Single crystals of Ce2PdGa12 have been synthesized in Ga flux and characterized by X-ray diffraction. This compound crystallizes in the tetragonal P4/nbm space group, Z=2 with lattice parameters of and . It shows strongly anisotropic magnetism and orders antiferromagnetically at TN∼11 K. A field-induced metamagnetic transition to the ferromagnetic state is observed below TN. Structure-property relationships with the related heavy-fermion antiferromagnet CePdGa6 are discussed. 相似文献
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Gd4Co2Mg3 (Nd4Co2Mg3 type; space group P2/m; a=754.0(4), b=374.1(1), c=822.5(3) pm and β=109.65(4)° as unit cell parameters) was synthesized from the elements by induction melting in a sealed tantalum tube. Its investigation by electrical resistivity, magnetization and specific heat measurements reveals an antiferromagnetic ordering at TN=75(1) K. Moreover, this ternary compound presents a metamagnetic transition at low critical magnetic field (Hcr=0.93(2) T at 6 K) and exhibits a magnetic moment of 6.3(1) μB per Gd-atom at 6 K and H=4.6 T. Due to this transition the compound shows a moderate magnetocaloric effect; at 77 K the maximum of the magnetic entropy change is ΔSM=−10.3(2) J/kg K for a field change of 0-4.6 T. This effect is compared to that reported previously for compounds exhibiting a magnetic transition in the same temperature range. 相似文献
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Single crystals of Tb4MGa12 (M=Pd, Pt) have been synthesized. The isostructural compounds crystallize in the cubic space group , with Z=2 and lattice parameters: a=8.5940(5) and 8.5850(3) Å for Tb4PdGa12 and Tb4PtGa12, respectively. The crystal structure consists of corner-sharing MGa6 octahedra and TbGa3 cuboctahedra. Magnetic measurements suggest that Tb4PdGa12 is an antiferromagnetic metamagnet with a Néel temperature of 16 K, while the Pt analog orders at TN=12 K. 相似文献
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