Magnetic hyperfine interactions in GdAl 3
作者： N. G. Ruggiero , D. C. Cook , A. S. Edelstein
DOI: 10.1007/BF02396113
关键词: RKKY interaction 、 Hyperfine structure 、 Antiferromagnetism 、 Gadolinium 、 Hexagonal lattice 、 Mössbauer spectroscopy 、 Magnetic structure 、 Field (physics) 、 Condensed matter physics 、 Chemistry
摘要: We have studied the magnetic hyperfine interactions in GdAl3 using155Gd Mossbauer spectroscopy between temperatures of 4K and 90K. Previous studies on shown that antiferromagnetic ordering occurs at 18K, a fit susceptibility to 1/(T-θp) yields θp value −89K. The large ratio TN is indicative frustration competing ferro-and interactions, which may be due combination oscillatory nature RKKY interaction geometry hexagonal lattice. Our show saturation field Gd site −24.0 T, with moments lying basal plane. efg gadolinium 2.55(1)×1017V cm−2 considerably larger than predicted by point charge calculation. This difference indicate there conduction electron contribution. A helical structure has been calculated from theory.
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