Abstract
The magnetostriction (MS) of REBa2Cu3O7−δ (RE=Y, Nd, Eu, Gd, Ho, Er, Yb) is reported as a function of magnetic field and temperature forH<5 T and 1.5<T<40 K. With nonmagnetic rare earths the MS is small and a linear function of the field atH>1 T. The MS is much larger when the rare earth carries a magnetic moment, as usual, but the volume MS observed with moment carrying REBa2Cu3O7−δ is larger than that of nonsuperconducting intermetalics. This effect is explained by the shielding currents which are induced by the 4f magnetic moments in the superconducting CuO-lattice. The thermal expansion of GdBa2Cu3O7−δ shows a large peak at the ordering temperature of 2.2 K in both the superconducting and the nonsuperconducting samples.
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Zieglowski, J., Blumenröder, S., Freimuth, A. et al. Magnetostriction of REBa2Cu3O7-δ . Z. Physik B - Condensed Matter 71, 429–436 (1988). https://doi.org/10.1007/BF01313928
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DOI: https://doi.org/10.1007/BF01313928