RF electrodynamics in small particles of oxides - a review

Abstract

RF electrodynamics, particularly, the low field rf absorption in small superconducting and manganite particles is reviewed and compared with their respective bulk counterparts. Experimental and theoretical aspects of the small particle electrodynamical response which is qualitatively different as compared to its bulk form, at least in the high-T superconducting YBa2Cu3O7-x (YBCO) cuprate superconductor and in the CMR manganite family members are discussed. Attention is focused on fascinating new phenomena like rf power induced "anomalous rf absorption" in the small particle system of YBCO and room temperature "Colossal Magneto Impedance" (CMI) in the micron size particles of manganites occurs, illustrating rich physics and paving way for new device applicaitons