Magnetization of small lead particles
classification
❄️ cond-mat.supr-con
cond-mat.mes-hallcond-mat.mtrl-sci
keywords
magnetizationgrainsleadsizeandersonbelowconsistentcriterion
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The magnetization of an ensemble of isolated lead grains of sizes ranging from below 6 nm to 1000 nm is measured. A sharp disappearance of Meissner effect with lowering of the grain size is observed for the smaller grains. This is a direct observation by magnetization measurement of the occurrence of a critical particle size for superconductivity, which is consistent with Anderson's criterion.
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