Drastic Change of Magnetic Interactions and Hysteresis through Site-Preferential Ru/Ir Substitution in Sc2FeRu5-xIrxB2

作者：Hermus Martin; Yang Minghui; Gruener Daniel; DiSalvo Francis J; Fokwa Boniface P T^*

来源：Chemistry of Materials, 2014, 26(5): 1967-1974.

DOI：10.1021/cm500237h

The quinary members of the complex boride series Sc2FeRu5-xIrxB2 were synthesized by arc melting the elements and characterized by powder and single-crystal X-ray diffraction as well as metallographic and energy-dispersive X-ray analyses. The use of a 4d/5d mixture allows distinguishing these elements with X-ray diffraction methods, thus enabling the study of site preference and its influence on the magnetic properties. The magnetic measurements reveal several changes of magnetic ordering within the series: from antiferromagnetism (Sc2FeRu5B2) to ferromagnetism (Sc2FeRuIr4B2) and finally to metamagnetism (Sc2FeIr5B2). Within the quinary series, the magnetic moments continuously increase with increasing amounts of Ir in one (8j) of two possible Wyckoff sites. The members with x = 2 and 3 represent the first hard magnetic borides of transition metals.

• 出版日期2014-3-11