Magnetostriction and thermal expansion of high T c magnetic superconductors REBa 2Cu 3O 7− x ( RE = Eu, Sm, Gd, Dy, Ho, Er, TmandY) Gd, Dy, Ho, Er, Tm and Y)

Abstract

Thermal expansion and magnetostriction measurements for REBa 2Cu 3O 7 −x superconductors are reported, up to 2.4 T and down to 3.8 K. Anisotropic striction is negligible, except for Dy and Ho compounds where is of single-ion origin. Volume striction displays similar order of magnitude and thermal variation, and it is weak (except for Dy compound) pointing to a “host” diamagnetic lattice origin.