Scientists and engineers are most familiar with single-crystal or polycrystialline field-responsive materials res-ponses typically occurring while the materials remain in the solid state. These materials demonstrate dramatic changes in their rheological properties including yield stress, loss and storage moduli etc. in response to an externally applied electric or magnetic field are known as electrorheological fluid (ERF) or magnetorheological (MRF), respectively. ERF and MRF exhibit a very fast, reversible transition from a free-flowing liquid state to a solid like state. This behavior is often described as Bing-ham plastic characteristics having shear modulus and yield stress dependent on external field that must be overcome to initiate gross material deformation or flow. The majority of the electrorheological fluids (ERF) are