二次元キラルフェリ磁性体の磁気構造
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概要
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A chiral molecule-based ferrimagnet, [Cr (CN)<SUB>6</SUB>][Mn (<I>S</I>)-pnH(H<SUB>2</SUB>O)](H<SUB>2</SUB>O), with <I>T</I><SUB>c</SUB>=38, was newly synthesized in order to investigate the effect on the magnetic structure of the chiral molecules. The magnetic structure was analyzed by the difference pattern between 50K and 4K with neutron powder diffractometer. Several magnetic reflections are clearly observed, but satellite peak from a long-period structure was not observed. From the intensity analysis of magnetic reflections, it was concluded that the magnetic space group (Shubnikov group) was P2<SUB>1</SUB>2<SUB>1</SUB>2<SUB>1</SUB>, and magnetic moments of Cr and Mn atoms were aligned antiparallel each other along the direction near the α-axis. Our result implies that the long-period magnetic structure, if exists, is not a helical structure but a conical one.