We have observed a softening of the Young's modulus accompanied by an increase in the internal friction, when the dc bias exceeds the threshold for nonlinear conduction in the spin-density-wave state of (TMTSF)&PF6. No field dependence of the elasticity is detected above the spin-density-wave transition near 12 K. The results are reminiscent of effects associated with the depinning of charge-density waves, except that here, the extrinsic coupling to the lattice may have profound effects on the dynamics of the system.
Synopsis:We present an overview of the design, development and current status of the cryogenic sys tem for the 45-T Hybrid superconducting magnet system.
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