Comparison of the magnetic properties of Gd7T3 (T=Pd and Rh) single crystals

Application of the aspherical scattering formalism on the refinement of macromolecules

“…It was, however, difficult to interpret the experiment and we have subsequently improved the experimental procedure and instrumentation. After that, a quantitative agreement with the theoretical estimates has been observed for, for example, PrAl2 and DyAl2 [3]. In this presentation, the newly measured results on SmAl2 will be shown and discussed.…”

“…The understanding of the delicate interactions intra-and inter-clusters is crucial to permit in future the design of new magnetic interesting compounds. Wide investigations of the Gd7T3 (T = Rh, Pd) single crystals were performed [2,3]. They crystallize in Th7Fe3 type hexagonal structure with c/a=0.63.…”

“…Since the contribution of the molecule itself to optical activity of the crystal was estimated as relatively small, the predominating intermolecular effects were expected to be responsible for the high gyration tensor components. To get necessary information, charge density analysis was performed [3] using the program package XD [4] and low-temperature (80 K) X-ray diffraction data. The results of the topological analysis of ρ(r) at the bond critical points gave a quantitative description of the hydrogen bonds whereas the properties of charge density distribution enabled the derivation of atom volume polarizabilities [5,6] The conventional modelling of an X-ray diffraction experiment makes use of the "Independent Atom Model (IAM)", which ignores a priori electron density asphericities caused by the interaction of atoms.…”

Influence of Yttrium Substitution οn the Electronic Structure and Magnetic Moment οf Gd7-xYxPd3(x = 0, 1, 2, 3, 4)

“…The values of the saturation magnetic moment are higher than the value 7 µ B expected if only the Gd atoms would carry a magnetic moment. This enhancement indicates that also the Pd atoms carry a magnetic moment in [5,6] along the c axis, for Gd 6 YPd 3 the moment of 7.54 µ B for both the measured directions was found [6]. In the case of Gd 5 Y 2 Pd 3 the magnetization for both the axes attains practically the same value of 7.9 µ B [8].…”

“…RM 2 (M = Al, Co, Ni), MnFe(P 1−x As x ), Mn(As 1−x Sb x ) and La(Fe 13−x Si x ) were reported [1,2]. Canepa et al [3] found the magnetocaloric effect for polycrystalline Gd 7 Pd 3 and ferromagnetic transition determined at T C = 323 K. The magnetic properties and temperature dependences of the lattice parameters of Gd 7 T 3 (T = Rh and Pd) and Gd 7−x Y x Pd 3 (x = 1, 2, 4) single crystals have already been reported [4][5][6][7][8]. These compounds crystallized in the same crystal structure type (Th 7 Fe 3 ) with the same c/a ratio of 0.63.…”