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The occurrence and nature of low-energy excitations associated with two-level tunneling systems in the metallic glass Pd0.775{Si}0.165Cu0.060 annealed to various levels of relaxation in the amorphous state and into crystalline phases have been studied by ultrasonics. In one of the crystalline phases the same density of two-level systems was found as in the amorphous phase.
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Cibuzar et al. (1984) studied this question.
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