RF Electrodynamics in Small Particles ofOxides—A Review

摘要

RF electrodynamics, particularly, the low field rf absorption in smallsuperconducting and manganite particles is reviewed and compared with their respective bulkcounterparts. Experimental and theoretical aspects of the small particle electrodynamicalresponse which is qualitatively different as compared to its bulk form, atleast in the high-T,superconducting YBa_2Cu_3O_(7-x)(YBCO) cuprate superconductor and in the CMR manganitefamily members are discussed. We focus attention on fascinating new phenomena like rf powerinduced '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 applications.