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The paramagnetic, antiferromagnetic, and ferromagnetic states of the gadolinium-yttrium alloy system have been examined by microwave resonance techniques. The paramagnetic g values are found to be concentration dependent ranging from 1.96±0.03 in pure gadolinium to 2.13±0.05 in the 3.7% gadolinium alloy. The results, in particular the experimentally determined g shifts, are discussed in terms of the Yosida development of Zener's proposal that the coupling between d (or f) spins is brought about by exchange interaction with the polarized conduction electrons.
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Popplewell et al. (1963) studied this question.
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