Search for superfluidity in hcp /sup 4/He

@inproceedings{Bishop1981SearchFS,
  title={Search for superfluidity in hcp /sup 4/He},
  author={D. J. Bishop and Paalanen and John D. Reppy},
  year={1981}
}
We have measured the moment of inertia of hcp /sup 4/He crystals from 25 mK to 2 K. With a precision of five parts in 10/sup 6/ we find no evidence for a nonclassical rotational inertia. This indicates that if a supersolid exists, it has a rho/sub s//rho of less than 5 x 10/sup -6/, a transition temperature of less than 25 mK, or a critical velocity of less than 5 ..mu..m/sec. 

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