Simultaneous measurements of both the conductivity and permeability are pre
sented using noninvasive methods based on inductive coupling. Explicit expr
essions for cylindrical and spherical geometries are derived. The technique
, especially relevant to liquids and solids in extreme environments, will a
lso be valuable for nanomaterials and other systems where external contacts
are difficult to establish. (C) 1999 American Institute of Physics. [S0003
-6951(99)02046-X].