Study of the Negative Magnetization Phenomenon in NBu_4[Fe^<II>Fe^<III>(ox)_3]

概要

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Temperattrre and rzuagnetic field dependerat un;tgtaetization stttdies of' ferrinaagneticNBtr.j [Fe"Fe"'(ox)3] ?xre presented, xvlaicla deunonstrate that tlae rnegative utaagraetizatior'n phe-notaaenon in the field-cooled nxode, observed onlv in ztaagr'?etic fields lower tlaan 5 kOe and attenaperatures below' 30 K. The absoltrte valtre of' tlae ferrinaagnetic satturattion uauatgnetization isO.07#.B, estiranated frotaa tl'xe field dependezuce of' the field-cooled taaagnetizattion at 5 K. which isonly the 77 of the theoretically expected xzaltre art O K. A tnagnetic field depetndence of thecoraapensation teuaaperattrre as well as a teraaperattrre dejcendeuace of coraapensating magnetic fieldare observed. The Iaysteresis ctrrve at 5 K trnder field-cooled tnode trrader l k0e r?aagnetic fieldshows a negative center off'-set indicating tlae preserace of laxrge axrrisotropy ira tlae uaaaterial at IOXVtetaaperattrres. The raaemory of' Blue field-cooling procedttre canraot be destroyed Icy a magneticfield of 55 kOe.
社団法人日本物理学会の論文
1999-05-15