Abstract
Bulk Bi(0.5)Sr(0.5)Fe(0.5)Cr(0.5)O(3) (BSFCO) is a new compound comprising the R3c structure. The structural, magnetic property and exchange bias (EB) details are investigated. The material was in the super-paramagnetic (SP) state at room temperature. Exchange bias usually occurs at the boundary between different magnetic states after field cooling (H(FC)) acts on the sample. Here the result shows that changing H(FC) from 1 to 6 T reduces the H(EB) value by 16% at 2 K at the same time. Meanwhile, H(EB) diminishes as the ferromagnetic layer thickness increases. The variation of (the thickness of ferromagnetic layer) t(FM) with the change of H(FC) leads to the tuning of H(EB) by H(FC) in BSFCO bulk. These effects are obviously different from the phenomenon seen in other oxide types.