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VOLUME 70 (1999) | ISSUE 1 | PAGE 36
Piezomagnetism and stress induced paramagnetic Meissner effect in mechanically loaded high-Tc granular superconductors
PACS: 74.50.+r, 74.62.Fj, 74.80.Bj, 75.80.+q
Two novel phenomena in a weakly coupled granular superconductor under an applied stress are predicted based on recently suggested piezophase effect (a macroscopic quantum analog of the piezoelectric effect). Namely, we consider the existence of stress induced paramagnetic moment in zero applied magnetic field (piezomagnetism) and its influence on a low-field magnetization (leading to a mechanically induced paramagnetic Meissner effect). The conditions under which these effects can be experimentally measured in high-Tc granular superconductors are discussed.