A systematic investigation was made of the structural and magnetic properties of CaB6 over a wide range of temperatures. Unlike conventional magnetic systems, the mechanism for magnetism in this compound appeared to be intimately connected to defects. Direct evidence was presented that introducing defects not only enhanced the magnetization but also increased the ordering temperature.

Defect Driven Magnetism in Calcium Hexaboride. S.E.Lofland, B.Seaman, K.V.Ramanujachary, N.Hur, S.W.Cheong: Physical Review B, 2003, 67[2], 020410 (3pp